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System of Measurement
Inch
Metric
Shaft Diameter
1/8"
1/4"
3/8"
1/2"
5/8"
0.635"
3/4"
7/8"
1"
1
1/2"
3 mm
5 mm
20 mm
30 mm
40 mm
OD
0.8"
1"
1.4"
1
1/2"
1.8"
1.85"
2"
2.1"
2.4"
2
1/2"
2.6"
2.8"
3"
3.1"
3.25"
3.4"
3.5"
4"
4.5"
4.8"
5"
5.5"
5.6"
6"
6.3"
7"
7.5"
15 mm
90 mm
100 mm
146 mm
For Maximum Belt Width
1/2"
3/4"
1"
2"
3"
6 mm
9 mm
12 mm
20 mm
21 mm
30 mm
37 mm
62 mm
Pulley Type
Idler
Standard
Belt Width
7/16"
9/16"
5/8"
11/16"
13/16"
7/8"
29/32"
1
1/16"
1
1/8"
2
1/16"
3
1/16"
4
1/2"
6
1/4"
Material
Aluminum
Brass
Iron
Nylon
Stainless Steel
Steel
Diameter
0.654"
0.872"
0.904"
1
1/8"
1.372"
1
3/8"
1.404"
1
1/2"
1.81"
1.85"
1.872"
1
7/8"
2"
2
1/8"
2
1/4"
2.31"
2.45"
2
1/2"
Belt Trade Size
4L
5L
A
AX
B
BX
GT
GT2
H
H8M
HTD
L
XL
Width
9/64"
5/32"
3/16"
13/64"
9/32"
1/2"
9/16"
39/64"
5/8"
11/16"
45/64"
23/32"
3/4"
49/64"
25/32"
51/64"
13/16"
55/64"
Bearing Type
Ball
Roller
ID
1/8"
1/4"
3/8"
1/2"
5/8"
0.635"
3/4"
7/8"
1"
1
1/2"
3 mm
5 mm
Shaft Type
Keyed
Round
Belt Type
Flat
Round
Timing
V
Press-Fit Mount Type
With Hub
Without Hub
V-Belt Type
Cogged
Standard
Bore Type
Finished
Plain
Number of Grooves
1
2
3
Shaft Mount Type
Press Fit
Set Screw
Slip Fit
Tooth Profile
Curved
Trapezoidal
Pitch
0.2"
0.375"
0.5"
8 mm
14 mm
Idler Type
Smooth
Toothed
DFARS Specialty Metals
Exempt
REACH
Compliant
Not Compliant
RoHS
Compliant
Export Control Classification Number (ECCN)
EAR99
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101 Products
Power Transmission
Flat Belt Idler Pulleys
Spin freely on built-in bearings to reduce wear and vibration on flat belts
31 products
Timing Belt Idler Pulleys
Add to your timing belt setup to minimize vibration and keep belts from wearing out
25 products
Round Belt Idler Pulleys
Spin freely on built-in bearings to reduce wear and vibration on round belts
21 products
V-Belt Drive Pulleys
Pair with a V-belt to transfer motion from a rotating shaft
10 products
V-Belt Idler Pulleys
Spin freely on built-in bearings to reduce wear and vibration on V-belts
14 products
The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)