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System of Measurement
Inch
Metric
Shaft Diameter
1/4"
5/16"
3/8"
1/2"
3/4"
7/8"
1"
1
1/4"
1
3/8"
1
1/2"
4 mm
5 mm
6 mm
8 mm
10 mm
12 mm
15 mm
20 mm
OD
2.6"
3.163"
5.22"
5.24"
8.25"
26 mm
33.3 mm
41.6 mm
50 mm
52 mm
53 mm
78 mm
104 mm
150 mm
200 mm
Roller Chain Trade Number
40
Component
Gear
Material
303 Stainless Steel
Aluminum
Brass
Bronze
Cast Iron
Plastic
Steel
ID
3/4"
7/8"
1"
1
1/4"
1
3/8"
1
1/2"
Pitch
0.2"
1/2"
2 mm
3 mm
Gear Pitch Diameter
2
1/2"
5"
25 mm
40 mm
50 mm
75 mm
100 mm
Bore Type
Clamping
Finished
Round
Overall Width
1"
1
1/8"
1
3/8"
6 mm
7 mm
10 mm
12 mm
14 mm
15 mm
16 mm
18 mm
18.26 mm
20 mm
22.26 mm
24 mm
25 mm
30 mm
43 mm
Shaft Type
Keyed
Keyway Width
3/16"
1/4"
5/16"
3/8"
Face Width
1/2"
5/8"
3 mm
4 mm
5 mm
6 mm
8 mm
9 mm
10 mm
12 mm
15 mm
20 mm
25 mm
Hub Diameter
1
1/2"
1.62"
1.94"
2"
3
1/2"
12 mm
16 mm
17 mm
20 mm
22 mm
23.77 mm
25 mm
28 mm
30 mm
31.75 mm
35 mm
45 mm
50 mm
55 mm
100 mm
Gear Type
Ratchet
Spur
Worm
Gear Module
0.5
0.8
1
1.5
2
Keyway Depth
3/32"
1/8"
5/32"
3/16"
Hub Width
0.5"
0.75"
4 mm
7 mm
8 mm
9 mm
10 mm
12 mm
18 mm
Strand Type
Single
Export Control Classification Number (ECCN)
EAR99
Speed Ratio
50:1
RoHS
Compliant
Compliant with Exemptions
REACH
Compliant
Not Compliant
DFARS Specialty Metals
Exempt
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36 Products
Power Transmission
Drive Sprockets
Mount directly onto a shaft to transmit rotary motion and torque
6 products
Timing Belt Drive Pulleys
Pair with a timing belt to transfer motion from a rotating shaft
3 products
Ratchet Gears
Couple with a pawl to transmit motion in one direction and stop it in the other
6 products
Worm Gears
Pair with a gear worm to reduce speed while transferring motion at a right angle in one direction
6 products
Spur Gears
The simplest type of gear for transferring motion, with straight, parallel teeth
15 products
The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)