Sprocket Catalog - U.S. Tsubaki, Inc.

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U.S. TSUBAKI SPROCKETS Idler Sprockets—Ball Bearing Ball Bearing Idler Sprocket Hardened Teeth Dimensions are in inches unless otherwise indicated. No. Catalog List Chain Wt. Teeth Number Price Size O.D. B L W Lbs. 20 17 18 15 17 13 15 12 35BB20 40BB17 40BB18 50BB15 50BB17 60BB13 60BB15 80BB12 $55.20 55.60 56.80 58.20 60.00 65.40 70.00 97.00 NOTE: 638 Dim. is + .005; 750 Dim. is + .005-.000. 35 40 40 50 50 60 60 80 2.60 2.97 3.14 3.32 3.72 3.51 3.98 4.36 .638 .638 .638 .638 .638 .638 .638 .750 .72 .72 .72 .72 .72 .72 .72 .61 .168 .284 .284 .343 .343 .459 .459 .575 .38 .52 .53 .75 .78 .76 1.06 1.50 Radial Load Capacity in Lbs. at Various Speeds (Outer Race Rotating) Sprocket No. RPM 50 100 300 500 750 1000 1200 35BB20—60BB13 80BB12 LOAD LOAD 650 1630 515 1290 357 895 300 755 265 665 240 600 225 565 Sprocket No. 35BB20—60BB13 80BB12 RPM 1500 1800 2400 2600 3000 3600 4000 LOAD 208 195 179 173 155 156 151 LOAD 523 493 447 434 415 — — Sprocket No. 35BB20—60BB13 RPM 4500 5000 LOAD 143 140 Ratings shown above are based on an average bearing life of 2,500 hours. 74
Sprocket Engineering Information Sprocket Terminology Sprocket Hardening Sprocket Tooth Dimensions Sprocket Formulas & Standard Keyways Sprocket Pitch Diameter Constants Speed Ratios Sprocket Diameters Sprocket Terminology Hub Type Hub type refers to the core of the sprocket. Each of the three standard hub types is designed for a specific need. • Type A has no hub extension and must be mounted on a flange, hub, or other holding device. • Type B has a hub extension on one side and is usually found on small or medium-size sprockets. • Type C has hub extensions on both sides and is usually found on large-diameter sprockets. Number of Teeth The number of teeth on a sprocket is determined by chain pitch and size. Larger sprockets, which have more teeth, generally last longer than smaller sprockets because wearing action is distributed over a greater area. Double-pitch sprockets, which have two teeth per chain pitch, also obtain longer wear life because only half the teeth engage with the chain per revolution. An odd number of teeth will engage with the chain only every other revolution, essentially doubling sprocket life. Periodically advance one tooth to obtain the same effect on double-pitch sprockets with an even tooth count. Maximum Bore Diameter The bore must be large enough to accommodate the shaft while maintaining sufficient hub wall thickness for proper strength. Length Thru Bore (LTB) Length thru bore, or hub thickness, must accommodate a keyway long enough to withstand shear stress from the shaft. Pitch Diameter The diameter of the pitch circle that passes through the center of the pin as the chain engages with the sprocket. Outside Diameter The diameter measured from the tip of one sprocket tooth directly across to the tip of the corresponding sprocket tooth. Bottom Diameter The diameter measured from the seating curve at the bottom of one sprocket tooth space directly across to the seating curve at the bottom of the corresponding sprocket tooth space. Caliper Diameter For sprockets with an odd number of teeth, measured from the seating curve at the bottom of one sprocket tooth space across to the seating curve at the bottom of the sprocket tooth space nearly opposite. TYPE A TYPE B TYPE C 75
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U.S. Tsubaki, Inc. Power Transmissi
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U.S. Tsubaki Sprockets Total qualit
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No. 25 1/ 4 ” Pitch — Stainless
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No. 35 3/ 8 ” Pitch — Finished
Page 9 and 10:
No. 35 3/ 8 ” Pitch — Multiple
Page 11 and 12:
No. 35 3/ 8 ” Pitch — QD ® Dim
Page 13 and 14:
No. 40 1/ 2 ” Pitch — Finished
Page 15 and 16:
No. 40 1/ 2 ” Pitch — Multiple
Page 17 and 18:
No. 40 1/ 2 ” Pitch — TAPER-LOC
Page 19 and 20:
No. 50 5/ 8 ” Pitch — Plain Bor
Page 21 and 22:
No. 50 5/ 8 ” Pitch — Stainless
Page 23 and 24: No. 50 5/ 8 ” Pitch — TAPER-LOC
Page 25 and 26: No. 50 5/ 8 ” Pitch — QD ® Dim
Page 27 and 28: No. 60 3/ 4 ” Pitch — Finished
Page 29 and 30: No. 60 3/ 4 ” Pitch — Multiple
Page 31 and 32: No.60 3/ 4 ” Pitch — TAPER-LOCK
Page 33 and 34: No. 80 1” Pitch — Plain Bore Di
Page 35 and 36: No. 80 1” Pitch — Stainless Ste
Page 37 and 38: No. 80 1” Pitch — TAPER-LOCK ®
Page 39 and 40: No. 80 1” Pitch — QD ® Dimensi
Page 41 and 42: No. 100 1 1 ⁄4” Pitch — Multi
Page 43 and 44: No. 100 1 1 ⁄4” Pitch — QD ®
Page 47 and 48: No.120 1 1 ⁄2” Pitch — QD ®
Page 51 and 52: No.140 1 3 ⁄4” Pitch — QD ®
Page 53 and 54: No. 160 2” Pitch — Multiple Str
Page 55 and 56: No. 180 2 1 ⁄4” Pitch — Plain
Page 57 and 58: No. 240 3” Pitch — Plain Bore S
Page 59 and 60: Double Pitch Sprockets Conveyor or
Page 61 and 62: Double Pitch Sprockets Conveyor or
Page 63 and 64: Double Single Sprockets 40 Double S
Page 65 and 66: Double Single TAPER-LOCK ® 40 Doub
Page 67 and 68: QD ® Weld-on Hubs Dimensions are i
Page 69 and 70: TAPER-LOCK ® Bushings TAPER-LOCK B
Page 71 and 72: QD ® Bushings Dimensions are in in
Page 73: Idler Sprockets—Chain Tensioners
Page 77 and 78: Sprocket Tooth Dimensions Sprocket
Page 79 and 80: Sprocket Pitch Diameter Constants T
Page 81 and 82: 81 Sprocket Diameters No. of Teeth
Page 83 and 84: Sprocket Diameters RS120 1 1 ⁄2
Page 85 and 86: Terms and Conditions of Sale PRICE-
Page 87 and 88: When you need made-to-order... U.S.
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Sprocket Catalog - U.S. Tsubaki, Inc.

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