Table of Tolerances
(timing pulleys • timing pulley stock • flanges)
TIMING PULLEYS O.D. TOLERANCES
.0816” PITCH (40 DP) +.000 -.003
2mm, 3mm, 5mm, .080”, 1/5”, 3/8” PITCH
0” – 1.000” O.D. +.002 -.000
1.001” – 2.000” O.D. +.003 -.000
2.001” – 4.000” O.D. +.004 -.000
4.001” – 7.000” O.D. +.005 -.000
7.001” – 12.000” O.D. +.006 -.000
12.001” – 20.000” O.D. +.007 -.000
20.000” AND UP O.D. +.008 -.000
LATERAL RUN OUT TOLERANCE
.001 T.I.R. PER INCH OF PULLEY DIA. (.020 MAX.)
BORE TOLERANCES
0” – 1.000” +.001 -.000
1.001” – 2.000” +.0015 -.000
2.001” – 3.000” +.002 -.000
3.001” AND UP +.0025 -.000
TIMING PULLEY STOCK O.D. TOLERANCES
.0816” PITCH (40 DP) +.000 -.003
2mm, 3mm, 5mm, .080”, 1/5”, 3/8” PITCH
0” – 1.000” O.D. +.002 -.000
1.001” – 2.000” O.D. +.003 -.000
2.001” – 4.000” O.D. +.004 -.000
4.000” – 7.000” O.D. +.005 -.000
ECCENTRICITY TOLERANCE
(PULLEY BORE TO O.D.)
0” – 8.000” .004
T.I.R. 8.000” AND UP
.0005 T.I.R. PER INCH OF PULLEY DIA. (NOT TO EXCEED O.D. TOLERANCE)
FLANGE TOLERANCES
OVERALL FORMED PITCH I.D. O.D. THICKNESS
.080 ±.003 ±.015 ±.010
.0816 ±.003 ±.015 ±.010
(40 DP) 2mm ±.003 ±.015 ±.010
3mm ±.003 ±.015 ±.010
5mm ±.003 ±.015 ±.010
1/5” ±.003 ±.015 ±.010 3/8” ±.005 ±.015 ±.010
1/5” PITCH
URETHANE KEVLAR CORD
BREAKING STRENGTH: 2500 LBS. PER INCH OF WIDTH
TEMPERATURE RANGE: 0°F TO 180°F
LENGTH TOLERANCE: CENTER DISTANCE TOLERANCE ± .020”
WIDTH TOLERANCE: ± .020” FOR BELTS 1/16”– 4” WIDE
3/8” PITCH
URETHANE KEVLAR CORD
BREAKING STRENGTH: 3000 LBS. PER INCH OF WIDTH
TEMPERATURE RANGE: 0°F TO 180°F
LENGTH TOLERANCE: CENTER DISTANCE TOLERANCE ± .020”
WIDTH TOLERANCE: ± .020” FOR BELTS 1/16”– 4” WIDE
1/5” PITCH
Neoprene and TruMotion
BREAKING STRENGTH: 895 LBS. PER INCH OF WIDTH
TEMPERATURE RANGE: -30°F TO 185°F
LENGTH TOLERANCE: CENTER DISTANCE TOLERANCE ± .020”
WIDTH TOLERANCE: see chart on page E6
3/8” PITCH
Neoprene and TruMotion
BREAKING STRENGTH: 920 LBS. PER INCH OF WIDTH
TEMPERATURE RANGE: -30°F TO 185°F
LENGTH TOLERANCE: CENTER DISTANCE TOLERANCE ± .020”
WIDTH TOLERANCE: see chart on page E6
