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System of Measurement
Inch
Metric
Shaft Diameter
1/32"
to
7/32"
1/32"
to
9/32"
1/32"
to
11/32"
1/32"
to
3/8"
1/32"
to
7/16"
1/32"
to
15/32"
1/32"
to
17/32"
1/32"
to
9/16"
1/32"
to
19/32"
1/32"
to
21/32"
1/32"
to
11/16"
1/32"
to
3/4"
1/32"
to
13/16"
1/32"
to 1
3/32"
3/32"
Number of Teeth
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
OD
0.28"
0.29"
0.33"
0.35"
0.37"
3/8"
0.4"
0.41"
0.42"
0.425"
0.44"
0.45"
0.46"
0.47"
0.48"
Roller Chain Trade Number
25
35
35-2
35-3
40
40-2
40-3
41
50
50-2
50-3
60
60-2
60-3
80
80-2
80-3
100
120
140
160
04B
05B
06B
06B-2
08B
08B-2
10B
12B
12B-2
16B
81X
Component
Gear
Gear Rack
Gear Stock
Internal Gear
Pawl
Shaft-Mounted Worm
Worm
Bore Type
Bushing
Clamping
Finished
Keyed
Plain
Round
Pitch
0.080"
0.1227"
0.1475"
0.2"
1/4"
3/8"
1/2"
5/8"
3/4"
0.875"
1"
1
1/4"
1
1/2"
1
3/4"
2"
2.609"
2 mm
2.030 mm
2.5 mm
3 mm
5 mm
5.080 mm
6 mm
8 mm
9.53 mm
10 mm
14 mm
Unit Price
Less than $30
$30 to $55
$55 to $85
$85 to $130
$130 or greater
Material
Aluminum
Brass
Bronze
Iron
Laminate
Plastic
Stainless Steel
Steel
Zinc
ID
3/32"
1/8"
3/16"
1/4"
5/16"
3/8"
1/2"
19/32"
5/8"
0.635"
23/32"
3/4"
7/8"
15/16"
1"
Shaft Type
Hex
Keyed
Round
Overall Width
11/64"
0.25"
0.264"
9/32"
0.286"
5/16"
0.313"
0.315"
11/32"
0.344"
3/8"
0.406"
13/32"
0.437"
7/16"
Hub Diameter
0.18"
0.188"
0.19"
0.22"
15/64"
1/4"
0.28"
0.281"
9/32"
0.31"
0.312"
0.313"
0.328"
21/64"
0.34"
Gear Pitch Diameter
1/4"
0.292"
0.312"
0.333"
3/8"
0.417"
0.438"
1/2"
0.55"
0.563"
0.583"
0.6"
5/8"
0.666"
0.667"
For Maximum Belt Width
1/8"
1/4"
3/8"
1/2"
3/4"
1"
1
1/2"
2"
3"
4"
3 mm
6 mm
9 mm
9.5 mm
10 mm
12 mm
12.7 mm
15 mm
16 mm
20 mm
21 mm
22 mm
25 mm
30 mm
32 mm
36 mm
37 mm
40 mm
50 mm
62 mm
68 mm
Belt Trade Size
2L
3L
3V
3VX
4L
5L
5V
5VX
A
AT5
AT10
AX
B
BX
GT
GT2
GT3
H
H5M
H8M
HTD
J
L
MXL
R8M
R14M
SPA
SPB
SPZ
T2.5
T5
T10
XH
XL
XPA
XPB
XPZ
XXH
Gear Type
Bevel
Helical
Miter
Ratchet
Spiral Bevel
Spiral Miter
Spur
Worm
Gear Pitch
3
4
5
6
7
8
9
10
11
12
14
16
18
20
22
24
26
28
30
32
36
40
48
64
80
Gear Module
0.5
0.75
0.8
1
1.25
1.5
1.75
2
2.5
2.75
3
3.25
3.5
3.75
4
4.5
5
5.5
6
7
8
Face Width
0.05"
0.08"
0.09"
0.11"
1/8"
0.13"
0.16"
3/16"
0.19"
0.2"
0.21"
7/32"
0.22"
0.23"
1/4"
Keyway Width
3/32"
0.094"
1/8"
0.187"
3/16"
0.188"
1/4"
5/16"
3/8"
1/2"
5/8"
3/4"
4 mm
5 mm
6 mm
Pressure Angle
14
1/2°
20°
REACH
Compliant
Not Compliant
RoHS
Compliant
Compliant with Exemptions
Not Compliant
DFARS Specialty Metals
Exempt
Export Control Classification Number (ECCN)
EAR99
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6,598 Products
Power Transmission
Spur Gears
The simplest type of gear for transferring motion, with straight, parallel teeth
584 products
Spur Gear Racks
Pair with a spur gear to convert rotary motion to linear motion
115 products
Internal Spur Gears
Teeth on the inside mesh with standard spur gears to save space
10 products
Worm Gears
Reduce speed while transferring motion at a right angle in only one direction
96 products
Miter Gears
Connect shafts at a right angle without changing speed or torque
74 products
Ratchet Gears and Pawls
Transmit motion in one direction and stop it in the other
39 products
Spur Gear Stock
Machine your own gears to an exact face width and shaft diameter
18 products
Helical Gears
Curved teeth stay in contact longer to transmit heavier loads at higher speeds than spur gears
28 products
Helical Gear Racks
Pair with a helical gear to convert rotary motion to linear motion
4 products
Bevel Gears
Reduce speed while transmitting motion at a right angle
24 products
Timing Belt Drive Pulleys
Pair with a timing belt to transfer motion from a rotating shaft
909 products
Drive Sprockets
Mount directly onto a shaft to transmit rotary motion and torque
3,671 products
Timing Belt Idler Pulleys
Add to your timing belt setup to minimize vibration and keep belts from wearing out
25 products
Idler Sprockets
Press against your chain to take up slack and reduce wear and vibration
85 products
V-Belt Drive Pulleys
Pair with a V-belt to transfer motion from a rotating shaft
591 products
Round Belt Drive Pulleys
Mount directly onto a shaft and pair with round belts to transmit rotary motion and torque
15 products
Flat Belt Drive Pulleys
Pair with a flat belt to transfer motion from a rotating shaft
25 products
Round Belt Idler Pulleys
Spin freely on built-in bearings to reduce wear and vibration on round belts
21 products
Flat Belt Idler Pulleys
Spin freely on built-in bearings to reduce wear and vibration on flat belts
31 products
V-Belt Idler Pulleys
Spin freely on built-in bearings to reduce wear and vibration on V-belts
14 products
Gear Boxes
Adjust motor speed to achieve the right torque for your machine; transmit motion at a 90° angle
170 products
Gear Box Mounts
Secure gear boxes that can’t be attached directly to a machine or other surface
6 products
Rotary Shafts
Pair with gears, sprockets, and bearings to transmit rotary motion
10 products
Measuring and Inspecting
Calipers
Take inside, outside, and depth measurements with more precision than a ruler
2 products
Gear Tooth Gauges
Identify your gear's pressure angle, pitch, and module
4 products
The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)