CHAIN TENSIONER - MANUAL TYPE
U.S. TSUBAKI STOCK SPROCKETS
HOW TO ORDER
IDLER SPROCKETS - BALL BEARING TYPE
Proper chain tension is necessary to obtain acceptable chain life. Tensioners are designed to adjust the slack that is needed and develops as chains operate on a daily basis. Tensioners contribute to efficient, quiet operation of the drive assembly.
How to Order Code: Example Model # for Ball Bearing Idler Sprockets
35
BB 20H
Selection Code:
Suggested Chain Size
Manual Tensioner Model #
Roller Chain Pitch Size
Idler Type
Number of Teeth
35
0-B
35: 3/8" Pitch (example pitch size)
40, 41
0-B or 1-B
BB : Ball Bearing Idler
20H : 20 Teeth - Hardened
E
50 60 80
1-B 1-B 2-B 2-B 2-B 3-B 3-B 3-B
Ball Bearing Idler Sprocket with Hardened Teeth
All dimensions in inches unless noted.
100 120 140 160 200
ANSI Chain #
# of Teeth
Outside Diameter
HUB Type
Nominal Tooth Width (W)
Wt. Lbs. 0.38 0.52 0.53 0.75 0.78 0.76 1.06 1.50
Sprocket #
LTB Bore Dia.
35 40 40 50 50 60 60 80
35BB20H 40BB17H 40BB18H 50BB15H 50BB17H 60BB13H 60BB15H 80BB12H
20 17 18 15 17 13 15 12
2.600 2.970 3.140 3.320 3.720 3.510 3.980 4.360
C C C C C C C C
0.168 0.284 0.284 0.343 0.343 0.459 0.459 0.575
0.720 0.720 0.720 0.720 0.720 0.720 0.720 0.610
0.638 0.638 0.638 0.638 0.638 0.638 0.638 0.750
LTB
STYLES
1/2"
1"
Manual Tensioner
W
Note: Bore tolerance for 35BB20H - 60BB15H is 0.638" - 0.643". These often utilize a 5/8" bolt to secure.
Bore tolerance for 80BB12H is 0.750" - 0.755". This size will often use a 3/4" bolt to secure.
2G
1/4" ALEMITE
GREASE PORT
HARD & GROUND IDLER SHAFT
D
ADJUSTING SCREW
F (ADJUSTABLE) C
K
M
A
All dimensions in inches unless noted.
Model Number
Wt. Lbs.
LTB
A B C D E
F
G 2G H J
K L M P
Ball Bearing Idler Sprocket Radial Load Capacity in Pounds
0-B 5.875 1.500 5.250 0.500 1.000 2.500 0.281 0.375 2.813 1.313 1.375 1.250 0.375 0.750 1.00 1-B 9.000 2.000 8.125 0.875 1.750 4.500 0.344 0.500 4.000 1.625 1.750 1.500 0.500 1.000 2.50 2-B 13.000 3.000 11.875 1.125 1.875 6.000 0.563 0.750 5.688 2.156 2.875 2.000 0.625 1.500 6.00 3-B 14.000 4.000 12.625 1.750 3.125 6.000 0.563 0.750 6.250 2.188 3.250 2.000 0.750 2.000 12.00
R.P.M.
50 100 300 500 750 1000 1200 1500 1800 2400 2600 3000 3600 4000 4500 5000
Description
650 515 357 300 265 240 225 208 195 179 173 155 156 151 143 140 1630 1290 895 755 665 600 565 523 493 447 434 415 - - - -
35BB20H-60BB13H
80BB12H
Ratings shown above are based on an average bearing life of 2500 hours.
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