Common use of Drawbar couplings Clause in Contracts

Drawbar couplings. The requirements of paragraphs 3.1. to 3.6. of this annex are applicable to all drawbar couplings of Class C50. Additional requirements which shall be fulfilled by standard drawbar couplings of Classes C50-1 to C50-6 are given in paragraph 3.7. of this annex. 3.1. Performance requirements - All drawbar couplings shall be able to satisfy the tests stated in Annex 6, paragraph 3.3. 3.2. Suitable drawbar eyes - Class C50 drawbar couplings shall be compatible with all Class D50 drawbar eyes and couplings with the specified characteristics. 3.3. Jaw Class C50 drawbar couplings shall have a jaw which is designed such that the appropriate drawbar eye is guided into the coupling. If the jaw, or a part supporting the jaw, can pivot about the vertical axis, it shall establish itself automatically in the normal position and with the coupling pin open, be effectively restrained in this position to give satisfactory guidance for the drawbar eye during the coupling procedure. If the jaw, or a part supporting the jaw, can pivot about the horizontal transverse axis, the joint providing the rotation capability shall be restrained in its normal position by a locking torque. The torque shall be sufficient to prevent a force of 200 N acting vertically upwards on the top of the jaw producing any deflection of the joint from its normal position. The locking torque shall be greater than that created by operation of the hand lever described in paragraph 3.6. of this annex. It shall be possible to bring the jaw to its normal position manually. A jaw that pivots about the horizontal transverse axis is only approved for bearing mass, S, of up to 50 kg and a V-value of up to 5 kN. If the jaw, or a part supporting the jaw, is pivoted about the longitudinal axis, the rotation shall be restrained by a locking torque of at least 100 Nm. The minimum required size of the jaw depends on the D value of the coupling: D value ≤ 18 kN - width 150 mm, height 100 mm D value > 18 kN ≤ 25 kN - width 280 mm, height 170 mm D value > 25 kN - width 360 mm, height 200 mm The external corners of the jaw may be radiused. Smaller jaws are permitted for Class C50-X drawbar couplings if their use is restricted to centre axle trailers up to 3.5 tonnes maximum permissible mass or if the use of a jaw from the above table is impossible due to technical reasons and if, furthermore, there are special circumstances such as visual aids for ensuring safe execution of the automatic coupling procedure and if the field of application is restricted in the approval according to information given by the coupling manufacturer in the communication form shown in Annex 1. 3.4. Minimum articulation of the coupled drawbar eye The drawbar eye, when coupled to a drawbar coupling but not fitted to a vehicle, shall have the degrees of articulation given below. If part of the articulation is provided by a special joint (Class C50-X drawbar couplings only), the field of application, given in the communication form shown in Annex 1, shall be restricted to the cases stated in Annex 7, paragraph 1.3.8. 3.4.1. ±90° horizontally about the vertical axis from the longitudinal axis of the vehicle - see Figure 5. Figure 5 3.4.2. ±20° vertically about the transverse axis from the horizontal plane of the vehicle - see Figure 6. Figure 6 3.4.3. ±25° axial rotation about the longitudinal axis from the horizontal plane of the vehicle - see Figure 7. Figure 7 3.5. Locking to prevent inadvertent uncoupling: In the closed position the coupling pin shall be locked by two positive mechanical engagement locking devices each of which shall remain effective should the other fail. The closed and locked position of the coupling shall be clearly indicated externally by a mechanical device. It shall be possible to verify the position of the indicator by feel, for example, in the dark. The mechanical indication device shall indicate the engagement of both locking devices (an AND condition). However, it is sufficient for the engagement of only one locking device to be indicated if, in this situation, engagement of the second locking device is an inherent feature of the design. 3.6. Opening devices 3.6.1. Hand levers Hand levers shall be of a design suitable for easy use with the end rounded off. The coupling shall not have any sharp edges or points of possible pinching near the hand lever which could result in injury during operation of the coupling. The force needed to release the coupling, measured without the drawbar eye, shall not exceed 250 N perpendicular to the hand lever along the line of operation. 3.6.2. Remote Control For installations with remote control, paragraph 13.3.6. of Annex 5 applies. 3.7. Special requirements for standard drawbar couplings of Classes C50-1 to C50-6: 3.7.1. The swivel motion of the drawbar eye about the transverse axis shall be achieved through the spherical shape of the coupling pin (and not by means of a joint); 3.7.2. Tensile and compressive shock loads along the longitudinal axis due to the clearance between the coupling pin and the drawbar eye shall be attenuated by spring and/or damping devices (except Class C50-1). 3.7.3. The dimensions shall be as given in Figure 8 and Table 4. 3.7.4. The couplings shall be suitable and tested for the characteristic values given in Table 5. Figure 8 Table 4 Dimensions of standard drawbar couplings (mm), see Figure 8 Class C50-1 C50-2 C50-3 C50-4 C50-5 C50-6 C50-7 Remarks e1 83 83 120 140 160 160 ±0.5 e2 56 56 55 80 100 100 ±0.5 d1 -- 54 74 84 94 94 maximum d2 10.5 10.5 15 17 21 21 H13 f 110 110 155 180 200 200 +6.0 -0 g 85 85 90 120 140 140 ±3.0 a 100 170 200 200 200 200 +20.0 -0 b 150 280 360 360 360 360 +20.0 -0 c 20 20 24 30 30 30 maximum h 150 190 265 265 265 265 maximum l1 -- 150 250 300 300 300 maximum l2 150 300 330 330 330 330 maximum l3 100 160 180 180 180 180 ±20.0 T -- 15 20 35 35 35 maximum Table 5 Minimum characteristic values for standard drawbar couplings Class C50-1 C50-2 C50-3 C50-4 C50-5 C50-6 C50-7 D 18 25 70 100 130 190 190 Dc 18 25 50 70 90 120 130 S 200 250 650 900 1,000 1,000 1,000 V 12 10 18 25 35 50 75 D = D value (kN) Dc = D value (kN) for centre axle trailer applications S = Static vertical load on coupling (kg) V = V value (kN)

Drawbar couplings. The requirements of paragraphs 3.1. to 3.6. of this annex are applicable to all drawbar couplings of Class C50. Additional requirements which shall be fulfilled by standard drawbar couplings of Classes C50-1 to C50-6 are given in paragraph 3.7. of this annex. 3.1. Performance requirements - All drawbar couplings shall be able to satisfy the tests stated in Annex 6, paragraph 3.3. 3.2. Suitable drawbar eyes - Class C50 drawbar couplings shall be compatible with all Class D50 drawbar eyes and couplings with the specified characteristics. 3.3. Jaw Class C50 drawbar couplings shall have a jaw which is designed such that the appropriate drawbar eye is guided into the coupling. If the jaw, or a part supporting the jaw, can pivot about the vertical axis, it shall establish itself automatically in the normal position and with the coupling pin open, be effectively restrained in this position to give satisfactory guidance for the drawbar eye during the coupling procedure. If the jaw, or a part supporting the jaw, can pivot about the horizontal transverse axis, the joint providing the rotation capability shall be restrained in its normal position by a locking torque. The torque shall be sufficient to prevent a force of 200 N acting vertically upwards on the top of the jaw producing any deflection of the joint from its normal position. The locking torque shall be greater than that created by operation of the hand lever described in paragraph 3.6. of this annex. It shall be possible to bring the jaw to its normal position manually. A jaw that pivots about the horizontal transverse axis is only approved for bearing mass, S, of up to 50 kg and a V-value of up to 5 kN. If the jaw, or a part supporting the jaw, is pivoted about the longitudinal axis, the rotation shall be restrained by a locking torque of at least 100 Nm. The minimum required size of the jaw depends on the D value of the coupling: D value ≤ 18 kN - width 150 mm, height 100 mm D value > 18 kN ≤ 25 kN - width 280 mm, height 170 mm D value > 25 kN - width 360 mm, height 200 mm The external corners of the jaw may be radiused. Smaller jaws are permitted for Class C50-X drawbar couplings if their use is restricted to centre axle trailers up to 3.5 tonnes maximum permissible mass or if the use of a jaw from the above table is impossible due to technical reasons and if, furthermore, there are special circumstances such as visual aids for ensuring safe execution of the automatic coupling procedure and if the field of application is restricted in the approval according to information given by the coupling manufacturer in the communication form shown in Annex 1. 3.4. Minimum articulation of the coupled drawbar eye The drawbar eye, when coupled to a drawbar coupling but not fitted to a vehicle, shall have the degrees of articulation given below. If part of the articulation is provided by a special joint (Class C50-X drawbar couplings only), the field of application, given in the communication form shown in Annex 1, shall be restricted to the cases stated in Annex 7, paragraph 1.3.8. 3.4.1. ±90° horizontally about the vertical axis from the longitudinal axis of the vehicle - see Figure 5. Figure 5 3.4.2. ±20° vertically about the transverse axis from the horizontal plane of the vehicle - see Figure 6. Figure 6 3.4.3. ±25° axial rotation about the longitudinal axis from the horizontal plane of the vehicle - see Figure 7. Figure 7 3.5. Locking to prevent inadvertent uncoupling: In the closed position the coupling pin shall be locked by two positive mechanical engagement locking devices each of which shall remain effective should the other fail. The closed and locked position of the coupling shall be clearly indicated externally by a mechanical device. It shall be possible to verify the position of the indicator by feel, for example, in the dark. The mechanical indication device shall indicate the engagement of both locking devices (an AND condition). However, it is sufficient for the engagement of only one locking device to be indicated if, in this situation, engagement of the second locking device is an inherent feature of the design. 3.6. Opening devices 3.6.1. Hand levers Hand levers shall be of a design suitable for easy use with the end rounded off. The coupling shall not have any sharp edges or points of possible pinching near the hand lever which could result in injury during operation of the coupling. The force needed to release the coupling, measured without the drawbar eye, shall not exceed 250 N perpendicular to the hand lever along the line of operation. 3.6.2. Remote Control For installations with remote control, paragraph 13.3.612.3.6. of Annex 5 applies. 3.7. Special requirements for standard drawbar couplings of Classes C50-1 to C50-6: 3.7.1. The swivel motion of the drawbar eye about the transverse axis shall be achieved through the spherical shape of the coupling pin (and not by means of a joint); 3.7.2. Tensile and compressive shock loads along the longitudinal axis due to the clearance between the coupling pin and the drawbar eye shall be attenuated by spring and/or damping devices (except Class C50-1). 3.7.3. The dimensions shall be as given in Figure 8 and Table 4. 3.7.4. The couplings shall be suitable and tested for the characteristic values given in Table 5. Figure 8 Table 4 Dimensions of standard drawbar couplings (mm), see Figure 8 Class C50-1 C50-2 C50-3 C50-4 C50-5 C50-6 C50-7 Remarks e1 83 83 120 140 160 160 ±0.5 e2 56 56 55 80 100 100 ±0.5 d1 -- 54 74 84 94 94 maximum d2 10.5 10.5 15 17 21 21 H13 f 110 110 155 180 200 200 +6.0 -0 g 85 85 90 120 140 140 ±3.0 a 100 170 200 200 200 200 +20.0 -0 b 150 280 360 360 360 360 +20.0 -0 c 20 20 24 30 30 30 maximum h 150 190 265 265 265 265 maximum l1 -- 150 250 300 300 300 maximum l2 150 300 330 330 330 330 maximum l3 100 160 180 180 180 180 ±20.0 T -- 15 20 35 35 35 maximum Table 5 Minimum characteristic values for standard drawbar couplings Class C50-1 C50-2 C50-3 C50-4 C50-5 C50-6 C50-7 D 18 25 70 100 130 190 190 Dc 18 25 50 70 90 120 130 S 200 250 650 900 1,000 1,000 1,000 V 12 10 18 25 35 50 75 D = D value (kN) Dc = D value (kN) for centre axle trailer applications S = Static vertical load on coupling (kg) V = V value (kN)

Drawbar couplings. The requirements of paragraphs 3.1. to 3.6. of this annex are applicable to all drawbar couplings of Class C50. Additional requirements which shall be fulfilled by standard drawbar couplings of Classes C50-1 to C50-6 are given in paragraph 3.7. of this annex. 3.1. Performance requirements - All drawbar couplings shall be able to satisfy the tests stated in Annex 6, paragraph 3.3. 3.2. Suitable drawbar eyes - Class C50 drawbar couplings shall be compatible with all Class D50 drawbar eyes and couplings with the specified characteristics. 3.3. Jaw Class C50 drawbar couplings shall have a jaw which is designed such that the appropriate drawbar eye is guided into the coupling. If the jaw, or a part supporting the jaw, can pivot about the vertical axis, it shall establish itself automatically in the normal position and with the coupling pin open, be effectively restrained in this position to give satisfactory guidance for the drawbar eye during the coupling procedure. If the jaw, or a part supporting the jaw, can pivot about the horizontal transverse axis, the joint providing the rotation capability shall be restrained in its normal position by a locking torque. The torque shall be sufficient to prevent a force of 200 N acting vertically upwards on the top of the jaw producing any deflection of the joint from its normal position. The locking torque shall be greater than that created by operation of the hand lever described in paragraph 3.6. of this annex. It shall be possible to bring the jaw to its normal position manually. A jaw that pivots about the horizontal transverse axis is only approved for bearing mass, S, of up to 50 kg and a V-V- value of up to 5 kN. If the jaw, or a part supporting the jaw, is pivoted about the longitudinal axis, the rotation shall be restrained by a locking torque of at least 100 Nm. The minimum required size of the jaw depends on the D value of the coupling: D value ≤ 18 kN - width 150 mm, height 100 mm D value > 18 kN ≤ 25 kN - width 280 mm, height 170 mm D value > 25 kN - width 360 mm, height 200 mm The external corners of the jaw may be radiused. Smaller jaws are permitted for Class C50-X drawbar couplings if their use is restricted to centre axle trailers up to 3.5 tonnes maximum permissible mass or if the use of a jaw from the above table is impossible due to technical reasons and if, furthermore, there are special circumstances such as visual aids for ensuring safe execution of the automatic coupling procedure and if the field of application is restricted in the approval according to information given by the coupling manufacturer in the communication form shown in Annex 1. 3.4. Minimum articulation of the coupled drawbar eye The drawbar eye, when coupled to a drawbar coupling but not fitted to a vehicle, shall have the degrees of articulation given below. If part of the articulation is provided by a special joint (Class C50-X drawbar couplings only), the field of application, given in the communication form shown in Annex 1, shall be restricted to the cases stated in Annex 7, paragraph 1.3.8. 3.4.1. ±90° horizontally about the vertical axis from the longitudinal axis of the vehicle - see Figure 5. Figure 5 3.4.2. ±20° vertically about the transverse axis from the horizontal plane of the vehicle - see Figure 6. Figure 6 3.4.3. ±25° axial rotation about the longitudinal axis from the horizontal plane of the vehicle - see Figure 7. Figure 7 3.5. Locking to prevent inadvertent uncoupling: In the closed position the coupling pin shall be locked by two positive mechanical engagement locking devices each of which shall remain effective should the other fail. The closed and locked position of the coupling shall be clearly indicated externally by a mechanical device. It shall be possible to verify the position of the indicator by feel, for example, in the dark. The mechanical indication device shall indicate the engagement of both locking devices (an AND condition). However, it is sufficient for the engagement of only one locking device to be indicated if, in this situation, engagement of the second locking device is an inherent feature of the design. 3.6. Opening devices 3.6.1. Hand levers Hand levers shall be of a design suitable for easy use with the end rounded off. The coupling shall not have any sharp edges or points of possible pinching near the hand lever which could result in injury during operation of the coupling. The force needed to release the coupling, measured without the drawbar eye, shall not exceed 250 N perpendicular to the hand lever along the line of operation. 3.6.2. Remote Control For installations with remote control, paragraph 13.3.612.3.6. of Annex 5 applies. 3.7. Special requirements for standard drawbar couplings of Classes C50-1 to C50-6: 3.7.1. The swivel motion of the drawbar eye about the transverse axis shall be achieved through the spherical shape of the coupling pin (and not by means of a joint); 3.7.2. Tensile and compressive shock loads along the longitudinal axis due to the clearance between the coupling pin and the drawbar eye shall be attenuated by spring and/or damping devices (except Class C50-1). 3.7.3. The dimensions shall be as given in Figure 8 and Table 4. 3.7.4. The couplings shall be suitable and tested for the characteristic values given in Table 5. Figure 8 Table 4 Dimensions of standard drawbar couplings (mm), see Figure 8 Class C50-1 C50-2 C50-3 C50-4 C50-5 C50-6 C50-7 Remarks e1 83 83 120 140 160 160 ±0.5 e2 56 56 55 80 100 100 ±0.5 d1 -- 54 74 84 94 94 maximum d2 10.5 10.5 15 17 21 21 H13 f 110 110 155 180 200 200 +6.0 -0 g 85 85 90 120 140 140 ±3.0 a 100 170 000 000 000 200 200 200 200 +20.0 -0 b 150 280 360 360 360 360 +20.0 -0 c 20 20 24 30 30 30 maximum h 150 190 265 265 265 265 maximum l1 -- 150 250 300 300 300 maximum l2 150 300 330 330 330 330 maximum l3 100 160 180 180 180 180 ±20.0 T -- 15 20 35 35 35 maximum Table 5 Minimum characteristic values for standard drawbar couplings Class C50-1 C50-2 C50-3 C50-4 C50-5 C50-6 C50-7 D 18 25 70 100 130 190 190 Dc 18 25 50 70 90 120 130 S 200 250 650 900 1,000 1,000 1,000 V 12 10 18 25 35 50 75 D = D value (kN) Dc = D value (kN) for centre axle trailer applications S = Static vertical load on coupling (kg) V = V value (kN)

Drawbar couplings. The requirements of paragraphs 3.1. to 3.6. of this annex are applicable to all drawbar couplings of Class C50. Additional requirements which shall be fulfilled by standard drawbar couplings of Classes C50-1 to C50-6 are given in paragraph 3.7. of this annex. 3.1. Performance requirements - All drawbar couplings shall be able to satisfy the tests stated in Annex 6, paragraph 3.3. 3.2. Suitable drawbar eyes - Class C50 drawbar couplings shall be compatible with all Class D50 drawbar eyes and couplings with the specified characteristics. 3.3. Jaw Class C50 drawbar couplings shall have a jaw which is designed such that the appropriate drawbar eye is guided into the coupling. If the jaw, or a part supporting the jaw, can pivot about the vertical axis, it shall establish itself automatically in the normal position and with the coupling pin open, be effectively restrained in this position to give satisfactory guidance for the drawbar eye during the coupling procedure. If the jaw, or a part supporting the jaw, can pivot about the horizontal transverse axis, the joint providing the rotation capability shall be restrained in its normal position by a locking torque. The torque shall be sufficient to prevent a force of 200 N acting vertically upwards on the top of the jaw producing any deflection of the joint from its normal position. The locking torque shall be greater than that created by operation of the hand lever described in paragraph 3.6. 3.6 of this annex. It shall be possible to bring the jaw to its normal position manually. A jaw that pivots about the horizontal transverse axis is only approved for bearing mass, S, of up to 50 kg and a V-V- value of up to 5 kN. If the jaw, or a part supporting the jaw, is pivoted about the longitudinal axis, the rotation shall be restrained by a locking torque of at least 100 Nm. The minimum required size of the jaw depends on the D value of the coupling: D value ≤ 18 kN - width 150 mm, height 100 mm D value > 18 kN ≤ # 25 kN - width 280 mm, height 170 mm D value > 25 kN - width 360 mm, height 200 mm The external corners of the jaw may be radiused. Smaller jaws are permitted for Class C50-X drawbar couplings if their use is restricted to centre axle trailers up to 3.5 tonnes maximum permissible mass or if the use of a jaw from the above table is impossible due to technical reasons and if, furthermore, there are special circumstances such as visual aids for ensuring safe execution of the automatic coupling procedure and if the field of application is restricted in the approval according to information given by the coupling manufacturer in the communication form shown in Annex 1. 3.4. Minimum articulation of the coupled drawbar eye The drawbar eye, when coupled to a drawbar coupling but not fitted to a vehicle, shall have the degrees of articulation given below. If part of the articulation is provided by a special joint (Class C50-X drawbar couplings only), the field of application, given in the communication form shown in Annex 1, shall be restricted to the cases stated in Annex 7, paragraph 1.3.8. 3.4.1. ±90° horizontally about the vertical axis from the longitudinal axis of the vehicle - see Figure 5. Figure 5 3.4.2. ±20° vertically about the transverse axis from the horizontal plane of the vehicle - see Figure 6. Figure 6 3.4.3. ±25° axial rotation about the longitudinal axis from the horizontal plane of the vehicle - see Figure 7. Figure 7 3.5. Locking to prevent inadvertent uncoupling: In the closed position the coupling pin shall be locked by two positive mechanical engagement locking devices each of which shall remain effective should the other fail. The closed and locked position of the coupling shall be clearly indicated externally by a mechanical device. It shall be possible to verify the position of the indicator by feel, for example, in the dark. The mechanical indication device shall indicate the engagement of both locking devices (an AND condition). However, it is sufficient for the engagement of only one locking device to be indicated if, in this situation, engagement of the second locking device is an inherent feature of the design. 3.6. Opening devices 3.6.1. Hand levers Hand levers shall be of a design suitable for easy use with the end rounded off. The coupling shall not have any sharp edges or points of possible pinching near the hand lever which could result in injury during operation of the coupling. The force needed to release the coupling, measured without the drawbar eye, shall not exceed 250 N perpendicular to the hand lever along the line of operation. 3.6.2. Remote Control For installations with remote control, paragraph 13.3.6. of Annex 5 applies. 3.7. Special requirements for standard drawbar couplings of Classes C50-1 to C50-6: 3.7.1. The swivel motion of the drawbar eye about the transverse axis shall be achieved through the spherical shape of the coupling pin (and not by means of a joint); 3.7.2. Tensile and compressive shock loads along the longitudinal axis due to the clearance between the coupling pin and the drawbar eye shall be attenuated by spring and/or damping devices (except Class C50-1). 3.7.3. The dimensions shall be as given in Figure 8 and Table 4. 3.7.4. The couplings shall be suitable and tested for the characteristic values given in Table 5. Figure 8 Table 4 Dimensions of standard drawbar couplings (mm), see Figure 8 Class C50-1 C50-2 C50-3 C50-4 C50-5 C50-6 C50-7 Remarks e1 83 83 120 140 160 160 ±0.5 e2 56 56 55 80 100 100 ±0.5 d1 -- 54 74 84 94 94 maximum d2 10.5 10.5 15 17 21 21 H13 f 110 110 155 180 200 200 +6.0 -0 g 85 85 90 120 140 140 ±3.0 a 100 170 200 200 200 200 +20.0 -0 b 150 280 360 360 360 360 +20.0 -0 c 20 20 24 30 30 30 maximum h 150 190 265 265 265 265 maximum l1 -- 150 250 300 300 300 maximum l2 150 300 330 330 330 330 maximum l3 100 160 180 180 180 180 ±20.0 T -- 15 20 35 35 35 maximum Table 5 Minimum characteristic values for standard drawbar couplings Class C50-1 C50-2 C50-3 C50-4 C50-5 C50-6 C50-7 D 18 25 70 100 130 190 190 Dc 18 25 50 70 90 120 130 S 200 250 650 900 1,000 1,000 1,000 V 12 10 18 25 35 50 75 D = D value (kN) Dc = D value (kN) for centre axle trailer applications S = Static vertical load on coupling (kg) V = V value (kN)

Drawbar couplings. The requirements of paragraphs 3.1. to 3.6. of this annex are applicable to all drawbar couplings of Class C50. Additional requirements which shall be fulfilled by standard drawbar couplings of Classes C50-1 to C50-6 are given in paragraph 3.7. of this annex. 3.1. Performance requirements - All drawbar couplings shall be able to satisfy the tests stated in Annex 6, paragraph 3.3. 3.2. Suitable drawbar eyes - Class C50 drawbar couplings shall be compatible with all Class D50 drawbar eyes and couplings with the specified characteristics. 3.3. Jaw Class C50 drawbar couplings shall have a jaw which is designed such that the appropriate drawbar eye is guided into the coupling. If the jaw, or a part supporting the jaw, can pivot about the vertical axis, it shall establish itself automatically in the normal position and with the coupling pin open, be effectively restrained in this position to give satisfactory guidance for the drawbar eye during the coupling procedure. If the jaw, or a part supporting the jaw, can pivot about the horizontal transverse axis, the joint providing the rotation capability shall be restrained in its normal position by a locking torque. The torque shall be sufficient to prevent a force of 200 N acting vertically upwards on the top of the jaw producing any deflection of the joint from its normal position. The locking torque shall be greater than that created by operation of the hand lever described in paragraph 3.6. of this annex. It shall be possible to bring the jaw to its normal position manually. A jaw that pivots about the horizontal transverse axis is only approved for bearing mass, S, of up to 50 kg and a V-value of up to 5 kN. If the jaw, or a part supporting the jaw, is pivoted about the longitudinal axis, the rotation shall be restrained by a locking torque of at least 100 Nm. The minimum required size of the jaw depends on the D value of the coupling: D value ≤ 18 kN - width 150 mm, height 100 mm D value > 18 kN ≤ 25 kN - width 280 mm, height 170 mm D value > 25 kN - width 360 mm, height 200 mm The external corners of the jaw may be radiused. Smaller jaws are permitted for Class C50-X drawbar couplings if their use is restricted to centre axle trailers up to 3.5 tonnes maximum permissible mass or if the use of a jaw from the above table is impossible due to technical reasons and if, furthermore, there are special circumstances such as visual aids for ensuring safe execution of the automatic coupling procedure and if the field of application is restricted in the approval according to information given by the coupling manufacturer in the communication form shown in Annex 1. 3.4. Minimum articulation of the coupled drawbar eye The drawbar eye, when coupled to a drawbar coupling but not fitted to a vehicle, shall have the degrees of articulation given below. If part of the articulation is provided by a special joint (Class C50-X drawbar couplings only), the field of application, given in the communication form shown in Annex 1, shall be restricted to the cases stated in Annex 7, paragraph 1.3.8. 3.4.1. ±90° horizontally about the vertical axis from the longitudinal axis of the vehicle - see Figure 5. Figure 5 3.4.2. ±20° vertically about the transverse axis from the horizontal plane of the vehicle - see Figure 6. Figure 6 3.4.3. ±25° axial rotation about the longitudinal axis from the horizontal plane of the vehicle - see Figure 7. Figure 7 3.5. Locking to prevent inadvertent uncoupling: In the closed position the coupling pin shall be locked by two positive mechanical engagement locking devices each of which shall remain effective should the other fail. The closed and locked position of the coupling shall be clearly indicated externally by a mechanical device. It shall be possible to verify the position of the indicator by feel, for example, in the dark. The mechanical indication device shall indicate the engagement of both locking devices (an AND condition). However, it is sufficient for the engagement of only one locking device to be indicated if, in this situation, engagement of the second locking device is an inherent feature of the design. 3.6. Opening devices 3.6.1. Hand levers Hand levers shall be of a design suitable for easy use with the end rounded off. The coupling shall not have any sharp edges or points of possible pinching near the hand lever which could result in injury during operation of the coupling. The force needed to release the coupling, measured without the drawbar eye, shall not exceed 250 N perpendicular to the hand lever along the line of operation. 3.6.2. Remote Control For installations with remote control, paragraph 13.3.6123.3.6. of Annex 5 applies. 3.7. Special requirements for standard drawbar couplings of Classes C50-1 to C50-6: 3.7.1. The swivel motion of the drawbar eye about the transverse axis shall be achieved through the spherical shape of the coupling pin (and not by means of a joint); 3.7.2. Tensile and compressive shock loads along the longitudinal axis due to the clearance between the coupling pin and the drawbar eye shall be attenuated by spring and/or damping devices (except Class C50-1). 3.7.3. The dimensions shall be as given in Figure 8 and Table 4. 3.7.4. The couplings shall be suitable and tested for the characteristic values given in Table 5. Figure 8 Table 4 Dimensions of standard drawbar couplings (mm), see Figure 8 Class C50-1 C50-2 C50-3 C50-4 C50-5 C50-6 C50-7 Remarks e1 83 83 120 140 160 160 ±0.5 e2 56 56 55 80 100 100 ±0.5 d1 -- 54 74 84 94 94 maximum d2 10.5 10.5 15 17 21 21 H13 f 110 110 155 180 200 200 +6.0 -0 g 85 85 90 120 140 140 ±3.0 a 100 170 200 200 200 200 +20.0 -0 b 150 280 360 360 360 360 +20.0 -0 c 20 20 24 30 30 30 maximum h 150 190 265 265 265 265 maximum l1 -- 150 250 300 300 300 maximum l2 150 300 330 330 330 330 maximum l3 100 160 180 180 180 180 ±20.0 T -- 15 20 35 35 35 maximum Table 5 Minimum characteristic values for standard drawbar couplings Class C50-1 C50-2 C50-3 C50-4 C50-5 C50-6 C50-7 D 18 25 70 100 130 190 190 Dc 18 25 50 70 90 120 130 S 200 250 650 900 1,000 1,000 1,000 V 12 10 18 25 35 50 75 D = D value (kN) Dc = D value (kN) for centre axle trailer applications S = Static vertical load on coupling (kg) V = V value (kN)