Ball Bearings Catalog - Timken

D
A
•
Ball BeaRIngs
IDLER PULLEY UNITS
• A pressed-steel pulley and a Timken precision ball bearing
with rubber seals are combined to make a self-contained unit.
• Two pulley designs are available. One for V-belts and another
for the backs of V-belts. Both are made for A, B, C and D
section belts.
• A chain idler is available that is identical in construction to
the flat idler, with the addition of an assembled rubber “tire”
(part number A-10927). The rubber “tire” cushions the chain,
preventing undue wear on the pulley surface or chain.
• Idler pulley units feature a Timken single-row radial ball
bearing with an inner ring extended on both sides. This
provides clearance for abutting parts and greater support on
the shaft.
• Contact-type rubber seals assure positive retention for
lubricant and full protection against dirt, dust and foreign
matter.
TO ORDER, SPECIFY PULLEY NUMBER. Example: 008-10853 Idler Pulley.
D136 TIMKEN PRODUCTS CATALOG
• All units are non-relubricatable. Special features include
smoothly rolled-over edges, eliminating belt chafing and
scuffing. The “weep holes” on the rivet circle allow water
drainage when the pulley is mounted in a horizontal position.
Pulley α Bearing Bore D A D1 W Belt Pitch Dia. Wt.
Number Included Number d A B C
Angle Degrees Section Section Section
v IDLERS
mm mm mm mm mm mm mm mm kg
in. in. in. in. in. in. in. in. lbs.
006-11520A (1) 32 WS3NPP3 10.01 / 9.78 76.2 19 12.45 63.5 0.145
0.394 / 0.385 3 3 /4 .049 2 1 /2 0.32
10874 (2) 34 203NPP 17.000 / 16.993 101.6 22.2 12.7 92.1 0.417
0.6693 / 0.6690 4 7 /8 0.5 3 5 /8 0.92
010-10874 34 203KRR2 16.13 / 16.26 101.6 22.2 12.7 92.1 0.435
0.635 / 0.640 4 7.8 0.5 3 5 /8 0.96
008-10482 32 203KRR5 13.08 / 12.95 128.6 31.8 22.15 95.2 114.3 0.572
0.515 / 0.510 5 1 /16 1 1 /4 0.872 3 3 /4 4 1 /2 1.26
010-10482 32 203KRR2 16.13 / 16.26 128.6 31.8 22.15 95.2 114.3 0.558
0.635 / 0.640 5 1 /16 1 1 /4 0.872 3 3 /4 4 1 /2 1.23
008-10853 32 203KRR5 13.08 / 12.95 185.7 31.8 22.15 152.4 171.4 1.134
0.515 / 0.510 7 5 /16 1 1 /4 0.872 6 6 3 /4 2.5
010-10853 32 203KRR2 16.13 / 16.26 185.7 31.8 22.15 152.4 171.4 1.12
0.635 / 0.640 7 5 /16 1 1 /4 0.872 6 6 3 /4 2.47
FLAT IDLERS
006-11581A (1) 10 WS3NPP3 10.01 / 9.78 92.1 30.6 76.2 22.2 0.259
0.394 / 0.385 3 5 /8 1 7 /32 3 7 /8 0.57
008-10601 10 203KRR5 13.08 / 12.95 117.5 36.5 101.6 25.4 0.503
0.515 / 0.510 4 5 /8 1 7 /16 4 1 1.11
010-10601 10 203KRR2 16.13 / 16.26 117.5 36.5 101.6 25.4 0.49
0.635 / 0.640 4 5 /8 1 7 /16 4 1 1.08
008-10483 10 203KRR5 13.08 / 12.95 158.8 36.5 139.7 25.4 0.803
0.515 / 0.510 6 1 /4 1 7 /16 5 1 /2 1 1.77
010-10483 10 203KRR2 16.13 / 16.26 158.8 36.5 139.7 25.4 0.789
0.635 / 0.640 6 1 /4 1 7 /16 5 1 /2 1 1.74
008-10650 50 203KRR5 13.08 / 12.95 158.8 36.5 139.7 25.4 0.785
0.515 / 0.510 6 1 /4 1 7 /16 5 1 /2 1 1.73
010-10650 50 203KRR2 16.13 / 16.26 158.8 41.3 139.7 25.4 0.771
0.635 / 0.640 6 1 /4 1 7 /16 5 1 /2 1 1.7
008-11515 10 203KRR5 13.08 / 12.95 222.2 35.7 203.2 25.4 1.238
0.515 / 0.510 8 3 /4 1 13 /32 8 1 2.73
010-11515 10 203KRR2 16.13 / 16.26 222.2 35.7 203.2 25.4 1.225
0.635 / 0.640 8 3 /4 1 13 /32 8 1 2.7
008-10731 10 203KRR5 13.08 / 12.95 222.2 48.4 203.2 38.1 1.488
0.515 / 0.510 8 3 /4 1 29 /32 8 1 1 /2 3.38
010-10731 10 203KRR2 16.13 / 16.26 222.2 48.4 203.2 38.1 1.474
0.635 / 0.640 8 3 /4 1 29 /32 8 1 1 /2 3.25
CHAIN IDLERS
008-10927 10 203KRR5 13.08 / 12.95 117.5 36.5 111.1 25.4 0.576
0.515 / 0.510 4 5 /8 1 7 /16 4 3 /8 1 1.27
010-10927 10 203KRR2 16.13 / 16.26 117.5 36.5 111.1 25.4 0.562
0.635 / 0.640 4 5 /8 1 7 /16 4 3 /8 1 1.24
(1) Inner ring width 13.891 mm - 13.764 mm; .5469’’ - .5419’’ (2) 12 mm Inner ring width .4724’’ - .4674’’
PITCH
DIA.
BELT
.720
α
W
A
V - IDLER
Idler Pulley Units
d D
D1
.720
α
W
A
FLAT - IDLER
d
D
D1
.720
α
W
A
CHAIN - IDLER
d
D