Classical Timing Belt Pulleys - Cross & Morse

1 INDEX BACKNEXT Tel +44 121 360 0155 Fax +44 121 325 1079 Email FEClassical Timing belt Pulleys have evenly spaced grooves cut in their periphery, to make correct, positive engagement with themating teeth of the belt . Cross & Morse Pulleys are manufactured with involute groove form to enable the teeth to enter and leavethe pulley with negligible friction and minimum are available in a number of stock widths and large selection of numbers of teeth to provide maximum versatility in driveselection. Pulleys for 3/8 pitch L , and 1/2 pitch H , drives are available with pilot bore for reworking to customers requirementsor with taper bush for the complete off the shelf drive.

2 All Pulleys are precision manufactured to close tolerances to ensure concentric running, and it is important when reworking stock Pulleys to accurately locate on the outside diameter to of non-standard widths or numbers of teeth can be supplied to order, or alternately teeth can be cut on customers Pulleys are manufactured in good quality steel except for larger Pulleys where cast iron is used (1/5 pitch XL are also availablein aluminium. Generally Pulleys up to 48 teeth are supplied with two flanges to retain the Timing belt . These flanges are accuratelymachined, pressed onto the pulley bodies and retained by spin rivetting.)

3 Dimensions over and between flanges for standard Pulleys are indicated below. The dimension over the flanges is generally the same as recommended width of tooth for unflanged Pulleys . ApproxWeightkgRimDiameterNClassical Timing belt PulleysCatalogue Pitch Pulleys for 3/8 Wide Belts. Ref. XL037 belt SizeBelt Width WidthEF min.(1/5 ) XLXL0373/8 (3/8 ) L(1/2 ) HStandard Pulleys for XL (1/5 pitch) dimensions in 1 Type 2 Type 1 FPulley Types available in both steel and aluminium. For steel add C to part number, for aluminium add L.

4 32 Timing belt Catalogue_Cross + Morse 13/12/2010 17:52 Page 32 INDEX BACKNEXT 33 Tel +44 121 360 0155 Fax +44 121 325 1079 Email LFdMAdpdoType 1 FMaterial: SteelType 2 Material: Cast IronWebs have lightening holesType 2 FMaterial: Cast IronWebs have lightening 1919191919191919191919191919191919191919 1919191919191919283030303032323232323232 3232323232323232323232324242424220242828 3436364040404545555858585870707070707070 75757575 Bore Pulleys for L Series Timing BeltsPulley TypesThe Pulley types referred to in tables are as drawings below.

5 Suffix F indicates pulley has flanges. Pulley below dividing line in tables are manufactured in cast iron. Std. Pulleys can be reworked tocustomers bore and Pitch Pulleys for 1/2 wide Belts. Ref. Pitch Pulleys for 3/4 wide Belts. Ref. 2525252525252525252525252525252525252525 2525252525252525383838383838383838383838 3838383838383838383838384545454520242828 3436364040404545555558585858707070707070 75757575 Pitch Pulleys for 1 wide Belts. Ref. 1012131415161718192021222324252627283032 36404448607284961F1F1F1F1F1F1F1F1F1F1F1F 1F1F1F1F1F1F1F1F1F2F2F2F2222 All dimensions in mm.

6 Other sizes of Pulleys can be supplied on short delivery. All Pulleys can be supplied finish bored and keywayed. Parallel bore Pulleys can be machined and fitted with bearings for idler Pulleys . When using Pulleys as inside idlers itis recommended that number of teeth of idler should be more than that of smaller drive belt Catalogue_Cross + Morse 13/12/2010 17:52 Page 33 INDEX BACKNEXT Tel +44 121 360 0155 Fax +44 121 325 1079 Email P14H100P16H100P18H100P19H100P20H100P21H1 00P22H100P24H100P26H100P28H100P30H100P32 H100P36H100P40H100P44H100P48H100P60H100P 72H100P84H100P96H100P120H100dMAdpdoLFNLF dMAdpdoType 1 FMaterial: SteelType 2 Material.

7 Cast IronFLdodpNdM sizes of Pulleys can be supplied on short delivery. All dimensions in Pulleys can be supplied finish bored and Bore Pulleys for H Series Timing Pitch Pulleys for 1 Wide Belts. Ref. Pitch Pulleys for 11/2 Wide Belts. Ref. 4545454545454545454545454545505050555560 6045455560626568728080808080808090901001 00120120 5858585858585858585858585858586565656565 65 Pitch Pulleys for 2 Wide Belts. Ref. 7070707070707070707070707070707575757575 75 Pitch Pulleys for 3 Wide Belts.

8 Ref. TypesThe pulley types referred to intables are as drawings suffix F indicates pulley has flanges. Pulleys below dividing line in tables are in Cast iron, and ofspoked design. Std. Pulleys can be reworked tocustomers bore and 2 FMaterial: Cast Iron34 Timing belt Catalogue_Cross + Morse 13/12/2010 17:52 Page 34 INDEX BACKNEXT 35 Tel +44 121 360 0155 Fax +44 121 325 1079 Email LANdodpFFdpdoMNLdpdoF/LAPulley TypesPulley types referred to in tables are as drawings below. The suffix F indicates pulleyhas flanges.

9 Pulleys belowdividing line in tables aremanufactured in cast iron. Types 7, 10 & 12 when in cast iron have lightening InstallationCorrect and accurate installation of Timing Drives is essential. Pulley alignment and shaft parallelism is very important as misalignment ofthe drive will cause unequal loading across the belt width and edge wear of belt on flanges. Pulley alignment can be checked by placing astraight edge against the outside edge of the Pulleys and adjusting so contact made evenly across both shaft should be located within a rigid framework, as any distortion under load could result in a reduction of centre distance which willcause jumping of belt on pulley teeth.

10 If idlers are used they must be locked firmly into position after correct belt tensioning. Refer to page 10 for additional information on drive Bore Pulleys for L Series Timing Pitch Pulleys for 1/2 wide Belts. Ref. Pitch Pulleys for 3/4 wide Belts. Ref. Pitch Pulleys for 1 wide Belts. Ref. dimensions in mm. For Taper Bush dimensions refer page 25. dpdoMAFLType 9 FType 8 FType 7 Type 5 FTiming belt Catalogue_Cross + Morse 13/12/2010 17:53 Page 35 INDEX BACKNEXT Tel +44 121 360 0155 Fax +44 121 325 1079 Email Taper Bore Pulleys for H Series Timing Pitch Pulleys for 1 wide Belts.