Universal joints. As easy as that.

Transcription

1 Universal joints As easy as that.

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3 ontents Introduction Product portfolio 4-5 For precise power transmission in any situation 7 Universal joints overview 8 S-series 9 Universal joints S 10 Universal joints SA 11 G-series/H-series 12 Universal joints G/B 13 Universal joints G/GB 14 Universal joints GA/GBA 15 Universal joints GR 18 Universal joints H/HB 19 Universal joints H/HB 20 Universal joints HA/HBA 21 Universal joints HR 24 Universal joints X 25 Universal joints X 26 Universal joints XA 27 Protective sleeves 28 lamping hu 29 lamping hu L2 30 Selection criteria application of diagrams 31 Selection diagram S-G 32 Selection diagram H 33 Mounting instructions 34 3

4 Product portfolio rive elements are our world. 4

5 Electromagnetically actuated clutches and rakes Shaft couplings Locking assemlies Belt drives Torque limiters Universal joints Linear motion 5

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7 For precise power transmission in any situation. Universal joints enale torque transmission etween drives and outputs that are located at a distance from each other. Spatial angular deflection and changes in axial length are compensated to ensure functionality. ifferent versions as well as individually adapted products, if required ensure the optimum specifications for your application. 7

8 Overview Needle earing Sliding ushes Stainless steel Max. 1,000 min -1 Max. 4,000 min -1 Max. 45 Max. 90 Telescopic Page S 10 High-precision universal joints for maximum duraility SA 11 G/GB* 13 Up to 1,000 min -1 with wear-resistant anti-friction ushes. Maintenance-free. G/GB* 14 GA/GBA* 15 GR 18 H/HB* 19 Up to 4,000 min -1 with roller earers with lurication for life. Maintenance-free. H/HB* 20 HA/HBA* 21 HR 24 X 25 Stainless steel non-corrosive X 26 XA 27 M Protective sleeve resistant to acid, oil, luricants, dust, moisture. For frequent and fast mounting and applications with virations. L2 30 Key to types = doule joint A = telescopic R = with quick release X = in stainless steel 1 = with clamping screw without nut 2 = with clamping screw and nut * According to IN 808/7551 esign with reduced outside diameter 8

9 Universal joints S-series S-series S-series universal joints are highly precise and durale. Integrated forked elements guarantee maximum duraility. The sophisticated design, highquality materials and modern production methods ensure that our universal joints relialy fulfil your requirements. For components that are sujected to heavy use, special case-hardened rni steel is used. In order to ensure efficient processing (ores, grooves, locking thread, etc.), the internal hus (6) and external sleeves (2) are produced from unhardened construction steel. A characteristic feature of this series is that no shaft journals or olts are used. This is a particular advantage in case of impact loads, high torque or changes in direction. The four forks (5) and the roust journals are produced from a single piece. This guarantees a very compact central element. (3) The journals are connected to the hardened earing surface of the forks. The mode of operation of the journals and earing surface increases the effectiveness and power/torque transmission of the universal joint, even under the toughest conditions. To avoid deflection, the forked elements are made as small as possile. Lurication channels are integrated into the hollow space in the central element to allow grease to flow from the grease feed regulator on the exterior (4) to the exterior to the journals. The grease reservoir in the central element ensures permanent lurication. The sealed design prevents grease from leaking and contaminants from intruding. The recommended maximum speed is 1,000 min -1. 9

10 Universal joints S-series S High-quality S-series joints. Basic element and forked element from a single piece of rni steel, case-hardened. HR >= 60, Rm >= 1,964 N/mm 2 Hardened rni steel HR 60 High load capacity, durale. Preluricated, with integrated lurication system. Maximum angle: 45 Maximum speed: 1,000 min -1 Special versions on request. Z Z L2 Z Z Z = ore area esign esign esign Weight [kg] Type d L2 a 01S 01S S 02S S 03S S 1 03S S 04S S 1 04S S 05S S 1 05S S 1S S 1 1S S 2S S 1 2S S 3S S 1 3S S 4S S 1 4S S 5S S 1 5S S 6S S 1 6S

11 Telescopic universal joints S-series SA High-quality S-series joints. Min. and max. lengths on request. Lmin > = Lmax + 2 L2 + B 2 2 Hardened rni steel HR 60 Stroke X > = Lmax - 2 L2 - B 2 Z B X Z Z Z Z = ore area L2 Welle Shaft L2 Lmin Lmax Lmin Lmax x = Stroke Type d L2 on request on request B a Shaft 01SA SW 8 02SA SW 10 03SA x 14 Z6 04SA x 16 Z6 05SA x 16 Z6 1SA x 20 Z6 2SA x 22 Z6 3SA x 25 Z6 4SA x 28 Z6 5SA x 32 Z6 6SA x 38 Z8 11

12 Universal joints with sliding ushes or needle earings In accordance with IN 808 With sliding ushes G With needle ushes H G-series G-series Universal joints comprise a forked element, central element and two joint elements with a forked head. Four wear-resistant ushes are integrated etween the journals of the forked element and the ores in the forks. The four ushes have lurication openings and a lurication reservoir. The sealed design prevents luricants from leaking and contaminants from intruding. This guarantees you maintenance-free operation and life-long lurication. The G-series is especially suited for low to medium speeds and the occurrence of peak loads and impact loads. It operates very smoothly and has a low friction factor. All joint surfaces are hardened and polished. The maximum operating angle is 45 for single joints and 90 for doule joints. The speed limitation for the G-series is 1,000 min -1. H-series H-series universal joints comprise a forked element, central element and two joint elements with a forked head. Four wear-resistant ushes are integrated etween the journals of the forked element and the ores in the forks. The four needle earing ushes have lurication openings and a lurication reservoir. The sealed design prevents luricants from leaking and contaminants from intruding. This guarantees you maintenance-free operation and life-long lurication. The H-series is especially suited for high speeds with low torque operates very smoothly and has a low friction factor. All joint surfaces are hardened and polished. The maximum operating angle is 45 for single joints and 90 for doule joints. The speed limitation for the H-series is 4,000 min-1. 12

13 Standard universal joints G-series G Wear-resistant slide ushes made of case-hardened steel. Roust, precise and versatile. For a wide range of applications. Maximum angle: 45 Maximum speed: 1,000 min -1 G according to IN 808 GB according to IN 808/7551 GB universal joints are universal joints with a reduced external diameter. Our experienced technicians are availale to dimension them for you. Special versions on request. Q SW L2 esign esign esign esign Weight [kg] Type d L2 a Q SW 01G 01G G 1 01G G 2Q G 02G G 1 02G G 2Q G 03G G 1 03G G 2Q G 04G G 1 04G G 2Q G 05G G 1 05G G 2Q G 1G G 1 1G G 2Q G 2G G 1 2G G 2Q G 3G G 1 3G G 2Q G 4G G 1 4G G 2Q G 5G G 1 5G G 2Q G 6G G 1 6G G 2Q G1 6G G1 1 6G G1 2Q G 7G G 1 7G * * * G 8G G 1 8G * * * 4.6 9G 9G G 1 9G * * * GB 03GB GB 1 03GB GB 2Q GB 04GB GB 1 04GB GB 2Q GB 1GB GB 1 1GB GB 2Q GB 3GB GB 1 3GB GB 2Q GB 5GB GB 1 5GB GB 2Q GB 6GB GB 1 6GB GB 2Q GB 8GB GB 1 8GB * * * 2.9 * On request 13

14 Standard doule universal joints G-series G Wear-resistant slide ushes made of case-hardened steel. Roust, precise and versatile. For a wide range of applications. Maximum angle: 90 Maximum speed: 1,000 min -1 G according to IN 808 GB according to IN 808/7551 GB universal joints are universal joints with a reduced external diameter. Our experienced technicians are availale to dimension them for you. Special versions on request. Q SW L4 L3 esign esign esign esign Weight [kg] Type d L3 L4 a Q SW 01G 01G G 1 01G G 2Q G 02G G 1 02G G 2Q G 03G G 1 03G G 2Q G 04G G 1 04G G 2Q G 05G G 1 05G G 2Q G 1G G 1 1G G 2Q G 2G G 1 2G G 2Q G 3G G 1 3G G 2Q G 4G G 1 4G G 2Q G 5G G 1 5G G 2Q G 6G G 1 6G G 2Q G1 6G G1 1 6G G1 2Q G 7G G 1 7G * * * G 8G G 1 8G * * * 7.2 9G 9G G 1 9G * * * 12 03GB 03GB GB 1 03GB GB 2Q GB 04GB GB 1 04GB GB 2Q GB 1GB GB 1 1GB GB 2Q GB 3GB GB 1 3GB GB 2Q GB 5GB GB 1 5GB GB 2Q GB 6GB GB 1 6GB GB 2Q GB 8GB GB 1 8GB * * * 4.3 * On request 14

15 Standard telescopic universal joints G-series GA G-series joints with wear-resistant slide ushes. Maximum angle: 90 Maximum speed: 1,000 min -1 GA according to IN 808 GAB according to IN 808/7551 Large range of lengths for each size. Lmin > = Lmax + 2 L2 + B 2 2 Stroke X > = Lmax - 2 L2 - B 2 B X Q 1 SW L2 Welle Shaft L2 Lmin Lmax Lmin Lmax x = Stroke Type d L2 on request on request B a Q SW 1 Shaft 01GA SW 8 02GA SW 8 03GA x 14 Z6 04GA x 16 Z6 05GA x 16 Z6 1GA x 20 Z6 2GA x 22 Z6 3GA x 25 Z6 4GA x 28 Z6 5GA x 32 Z6 6GA x 38 Z8 7GA * * x 42 Z8 8GA * * x 48 Z8 9GA * * x 54 Z8 03GBA SW 8 04GBA x 14 Z6 1GBA x 16 Z6 3GBA x 20 Z6 5GBA x 25 Z6 6GBA x 32 Z6 8GBA * * x 42 Z8 * On request 15

16 Standard telescopic universal joints G-series GA G-series joints with wear-resistant slide ushes. Maximum angle: 90 Maximum speed: 1,000 min -1 Large range of lengths for each size. 1 L2 Welle Shaft L2 Lmin Lmax esign Weight [kg] Type d L2 Lmin Lmax Stroke a 1 Shaft 03GA1 03GA x 14 Z GA15 03GA x 14 Z GA2 03GA x 14 Z GA25 03GA x 14 Z GA1 04GA x 16 Z GA15 04GA x 16 Z GA2 04GA x 16 Z GA23 04GA x 16 Z GA26 04GA x 16 Z GA29 04GA x 16 Z GA32 04GA x 16 Z GA1 05GA x 16 Z GA15 05GA x 16 Z GA18 05GA x 16 Z GA2 05GA x 16 Z GA23 05GA x 16 Z GA26 05GA x 16 Z GA29 05GA x 16 Z GA32 05GA x 16 Z GA35 05GA x 16 Z

17 Standard telescopic universal joints G-series GA esign Weight [kg] Type d L2 Lmin Lmax Stroke a 1 Shaft 1GA1 1GA x 20 Z GA15 1GA x 20 Z GA2 1GA x 20 Z GA23 1GA x 20 Z GA26 1GA x 20 Z GA29 1GA x 20 Z GA32 1GA x 20 Z GA35 1GA x 20 Z GA1 2GA x 22 Z GA15 2GA x 22 Z GA18 2GA x 22 Z GA2 2GA x 22 Z GA23 2GA x 22 Z GA26 2GA x 22 Z GA29 2GA x 22 Z GA1 3GA x 25 Z GA15 3GA x 25 Z GA18 3GA x 25 Z GA2 3GA x 25 Z GA23 3GA x 25 Z GA26 3GA x 25 Z GA29 3GA x 25 Z GA05 4GA x 28 Z GA1 4GA x 28 Z GA15 4GA x 28 Z GA2 4GA x 28 Z6 3 4GA23 4GA x 28 Z GA26 4GA x 28 Z GA1 5GA x 32 Z GA15 5GA x 32 Z GA2 5GA x 32 Z GA23 5GA x 32 Z GA26 5GA x 32 Z GA29 5GA x 32 Z GA32 5GA x 32 Z GA1 6GA x 38 Z GA15 6GA x 38 Z GA18 6GA x 38 Z GA2 6GA x 38 Z GA23 6GA x 38 Z GA26 6GA x 38 Z GA29 6GA x 38 Z

18 a JS Standard universal joints with quick release G-series GR S W G-series universal joints with quick release for quick and easy mounting/ dismounting. Maximum angle: 45 Maximum speed: 1,000 min -1 f S W Y R= e /2 e f Y L2 f esign esign Type d L2 Y e f a SW 02GR GR GR 1SW 8 03GR (8)* 03GR GR 1SW 10 (9.06)* 04GR (10.5)* 04GR GR 1SW 12 (11.15)* 05GR GR GR 1SW 14 1GR GR GR 1SW 16 2GR GR GR 1SW 18 3GR GR GR 1SW 20 4GR GR GR 1SW 22 5GR GR GR 1SW 25 6GR GR GR 1SW 30 * Values in rackets are optional measurements 18

19 Universal joints for high speeds with needle earings H-series H H-series joints for high speeds with needle earings that are luricated for life. Maintenance-free! Precise and versatile, smooth and even operation. Suitale for a wide range of applications. Maximum angle: 45 Maximum speed: 4,000 min -1 H according to IN 808 HB according to IN 808/7551 HB universal joints are universal joints with a reduced external diameter. Our experienced technicians are availale to dimension them for you. Special versions on request. Q SW L2 esign esign esign esign Weight [kg] Type d L2 a Q SW 03H 03H H 1 03H H 2Q H 04H H 1 04H H 2Q H 05H H 1 05H H 2Q H 1H H 1 1H H 2Q H 2H H 1 2H H 2Q H 3H H 1 3H H 2Q H 4H H 1 4H H 2Q H 5H H 1 5H H 2Q H 6H H 1 6H H 2Q H1 6H H1 1 6H H1 2Q H 7H H 1 7H * * * H 8H H 1 8H * * * 4.6 9H 9H H 1 9H * * * HB 04HB HB 1 04HB HB 2Q HB 1HB HB 1 1HB HB 2Q HB 3HB HB 1 3HB HB 2Q HB 5HB HB 1 5HB HB 2Q HB 6HB HB 1 6HB HB 2Q HB 8HB HB 1 8HB * * * 2.9 * On request 19

20 oule universal joints for high speeds with needle earings H-series H H-series joints for high speeds with needle earings that are luricated for life. Maintenance-free! Precise and versatile, smooth and even operation. Suitale for a wide range of applications. Maximum angle: 90 Maximum speed: 4,000 min -1 H according to IN 808 HB according to IN 808/7551 HB universal joints are universal joints with a reduced external diameter. Our experienced technicians are availale to dimension them for you. Special versions on request. Q SW L4 L3 esign esign esign esign Weight [kg] Type d L3 L4 a Q SW 03H 03H H 1 03H H 2Q H 04H H 1 04H H 2Q H 05H H 1 05H H 2Q H 1H H 1 1H H 2Q H 2H H 1 2H H 2Q H 3H H 1 3H H 2Q H 4H H 1 4H H 2Q H 5H H 1 5H H 2Q H 6H H 1 6H H 2Q H1 6H H1 1 6H H1 2Q H 7H H 1 7H * * * H 8H H 1 8H * * * 7.2 9H 9H H 1 9H * * * 12 04HB 04HB HB 1 04HB HB 2Q HB 1HB HB 1 1HB HB 2Q HB 3HB HB 1 3HB HB 2Q HB 5HB HB 1 5HB HB 2Q HB 6HB HB 1 6HB HB 2Q HB 8HB HB 1 8HB * * * 4.3 * On request 20

21 Telescopic universal joints for high speeds H-series HA H-series joints for high speeds with needle earings that are luricated for life. Maintenance-free! Maximum angle: 90 Maximum speed: 4,000 min -1 HA according to IN 808 HBA according to IN 808/7551 Lmin > = Lmax + 2 L2 + B 2 Stroke X > = Lmax - 2 L2 - B 2 B X Q 1 SW L2 Welle Shaft L2 Lmin Lmax Lmin Lmax x = Stroke Type d L2 on request on request B a Q SW 1 Shaft 03HA x 14 Z6 04HA x 16 Z6 05HA x 16 Z6 1HA x 20 Z6 2HA x 22 Z6 3HA x 25 Z6 4HA x 28 Z6 5HA x 32 Z6 6HA x 38 Z8 7HA * * x 42 Z8 8HA * * x 48 Z8 9HA * * x 54 Z8 04HBA x 14 Z6 1HBA x 16 Z6 3HBA x 20 Z6 5HBA x 25 Z6 6HBA x 32 Z6 8HBA * * x 42 Z8 * On request 21

22 Telescopic universal joints for high speeds H-series HA H-series joints for high speeds with needle earings that are luricated for life. Maintenance-free! Large range of lengths for each size. 1 L2 Welle Shaft L2 Lmin Lmax esign Weight [kg] Type d L2 Lmin Lmax Stroke a 1 Shaft 03HA1 03HA x 14 Z HA15 03HA x 14 Z HA2 03HA x 14 Z HA25 03HA x 14 Z HA1 04HA x 16 Z HA15 04HA x 16 Z HA2 04HA x 16 Z HA23 04HA x 16 Z HA26 04HA x 16 Z HA29 04HA x 16 Z HA32 04HA x 16 Z HA1 05HA x 16 Z HA15 05HA x 16 Z HA18 05HA x 16 Z HA2 05HA x 16 Z HA23 05HA x 16 Z HA26 05HA x 16 Z HA29 05HA x 16 Z HA32 05HA x 16 Z HA35 05HA x 16 Z

23 Telescopic universal joints for high speeds H-series HA esign Weight [kg] Type d L2 Lmin Lmax Stroke a 1 Shaft 1HA1 1HA x 20 Z HA15 1HA x 20 Z HA2 1HA x 20 Z HA23 1HA x 20 Z HA26 1HA x 20 Z HA29 1HA x 20 Z HA32 1HA x 20 Z HA35 1HA x 20 Z HA1 2HA x 22 Z HA15 2HA x 22 Z HA18 2HA x 22 Z HA2 2HA x 22 Z HA23 2HA x 22 Z HA26 2HA x 22 Z HA29 2HA x 22 Z HA1 3HA x 25 Z HA15 3HA x 25 Z HA18 3HA x 25 Z HA2 3HA x 25 Z HA23 3HA x 25 Z HA26 3HA x 25 Z HA29 3HA x 25 Z HA05 4HA x 28 Z HA1 4HA x 28 Z HA15 4HA x 28 Z HA2 4HA x 28 Z6 3 4HA23 4HA x 28 Z HA26 4HA x 28 Z HA1 5HA x 32 Z HA15 5HA x 32 Z HA2 5HA x 32 Z HA23 5HA x 32 Z HA26 5HA x 32 Z HA29 5HA x 32 Z HA32 5HA x 32 Z HA1 6HA x 38 Z HA15 6HA x 38 Z HA18 6HA x 38 Z HA2 6HA x 38 Z HA23 6HA x 38 Z HA26 6HA x 38 Z HA29 6HA x 38 Z

24 Universal joints with quick release H-series HR G-series universal joints with quick release for quick and easy mounting/ dismounting. S W Maximum angle: 45 Maximum speed: 1,000 min -1 f S W Y R= e /2 f e f Y L2 esign esign Type d L2 Y e f a SW 03HR (8)* 03HR HR 1SW 10 (9.06)* 04HR (10.5)* 04HR HR 1SW 12 (11.15)* 05HR HR HR 1SW 14 1HR HR HR 1SW 16 2HR HR HR 1SW 18 3HR HR HR 1SW 20 4HR HR HR 1SW 22 5HR HR HR 1SW 25 6HR HR HR 1SW 30 * Values in rackets are optional measurements 24

25 Stainless steel joints X-series X Non-corrosive Maximum angle: 45 Special versions on request. Q SW L2 esign Weight [kg] Type d L2 a Q SW 01X 01X X 02X X 03X X 04X X 1X X 3X X 5X X 6X

26 Stainless steel doule universal joints X-series X Non-corrosive Maximum angle: 90 Special versions on request. Q SW L4 L3 esign Weight [kg] Type d L3 L4 a Q SW 01X 01X X 02X X 03X X 04X X 1X X 3X X 5X X 6X

27 Telescopic stainless steel universal joints X-series XA Non-corrosive Material: AISI 304 EN Min. and max. lengths and special versions on request. Q B X 1 SW L2 Welle Shaft L2 Lmin Lmax Lmin Lmax x = Stroke Type d L2 on request on request B a Q SW 1 Shaft 03XA x 14 Z6 04XA x 16 Z6 1XA x 20 Z6 3XA x 25 Z6 5XA x 32 Z6 6XA x 38 Z8 27

28 Protective sleeves M The protective sleeves are made of a special neoprene compound and are resistant to acid, oil, luricants, dust and moisture. The protective sleeves are filled with grease to ensure permanent lurication. A B Type A B * 01M M M M /26 05M /29 1M M /37 3M M /47 5M /52 6M * Universal joints external diameter 28

29 lamping hu Type The clamping hu version is perfectly suited for frequent and fast mounting. lamping hus are also used for applications with virations. The connection is acklash-free. Suitale for simple and length-adjustale joints and doule joints in the G and H-series. Affixed with a clamping screw without a nut. Special versions on request. M T M Type d a M T Ta* [Nm] M M M M M M M M M M M M * Max. tightening torque of clamping screw 29

30 lamping hu Type L2 L2 The clamping hu version is perfectly suited for frequent and fast mounting. lamping hus are also used for applications with virations. The connection is acklash-free. E F Suitale for simple and length-adjustale joints and doule joints in the G and H-series. Affixed with a clamping screw and nut. Special versions on request. E F T R d J 0-0,2 E F Y S Type d a F T E J R Y Ta* [Nm] S IN L ø M5 = 9 17 x 14 Z9 2L ø M5 = 9 18 x 15 Z10 3L ø M5 = 9 20 x 17 Z12 5L ø M6 = x 22 Z14 * Max. tightening torque of clamping screw 30

31 Selection criteria Application of diagrams S G H If two unaligned shafts are connected with a simple universal joint and a shaft rotates with uniform angular speed, the other shaft will move nonuniformly. This non-uniformity also known as cardan error leads to angular acceleration/deceleration in the form of sine-like oscillations. The size of the cardan error depends on the operating angle. Simple universal joints are only used where a non-uniform rotational motion is permitted. Rotational motion, it is necessary to use either two identical joints opposite each other at the same angles, or a doule joint. The irregularities caused y the first joint are compensated for y the second joint. The doule joint has a shorter mounting length. Application of diagrams The selection of universal joints does not only depend on the largest torque that has to e transmitted various operating conditions such as angles, speeds, impact load etc. must also e taken into account. Our diagrams displayed on the following pages serve to make an initial, approximate calculation of the universal joint size needed and to provide you with calculation guidelines. 31

32 Application of diagrams S G The dimensioning of the universal joints is carried out in accordance with the drive power or the drive torque, taking account of the operating angle and the corresponding correction factor. Torque [Nm] = 9,550 x power [kw] / speed [min -1 ] M[Nm] 200 P[kW] Joint shaft size Nm alculation example 1: rive power: 0.65 kw Operating speed: 230 min -1 Operating angle 10 orrection factor Nm M = 9,550 x 0.65 / 230 x 1 = 27 Nm 20 Torque corresponds to size alculation example 2: P2 P rive power: 0.65 kw Operating speed: 230 min -1 Operating angle 30 orrection factor 2.2 M = 9,550 x 0.65 / 230 x 2.2 = 59.4 Nm Torque corresponds to size 1 Our technicians will e happy to help you dimension universal joints with with a reduced external diameter n[min -1] Angle orrection factor

33 Application of diagrams H The dimensioning of the universal joints is carried out in accordance with the drive power or the drive torque, taking account of the operating angle and the corresponding correction factor. Torque [Nm] = x power [kw] / speed[min -1 ] M[Nm] 200 P[kW] Nm alculation example 1: rive power: 5.5 kw Operating speed: 2300 min -1 Operating angle 10 orrection factor 1 Joint shaft size ,8 0,6 0,5 0,04 P2 P Nm M = 9,550 x 5.5 / 2,300 x 1 = 23 Nm Torque corresponds to size 05 alculation example 2: rive power: 5.5 kw Operating speed: 2,300 min -1 Operating angle 25 orrection factor 1.4 M = 9,550 x 5.5 / 2,300 x 1.4 = 32 Nm Torque corresponds to size 1 Our technicians will e happy to help you dimension universal joints with a reduced external diameter. 03 0,03 0,02 0, n[min -1] Angle orrection factor

34 Mounting instructions Right Wrong Forked head alignment When using two single joints, the alignment of the internal forks must e taken into account. With lengthadjustale shafts, it must also e ensured that the arrow markings line up. Identical angles The operating angles of the universal joints must e identical. Parallel position The shafts must only e positioned in parallel or symmetrically. In order to avoid damage, the pin ores must not e drilled level with the forks. Support The shaft earings should e positioned as close as possile to the joints. 34

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36 Suject to technical alterations.