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    ![2303 Series Steel, MOD 0.8 Pinion Gear (8mm REX™ Bore, 20 Tooth) 2303 Series Steel, MOD 0.8 Pinion Gear (8mm REX™ Bore, 20 Tooth)]()  2303-4008-0020 20 Tooth$10.59
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    ![2303 Series Steel, MOD 0.8 Pinion Gear (8mm REX™ Bore, 24 Tooth) 2303 Series Steel, MOD 0.8 Pinion Gear (8mm REX™ Bore, 24 Tooth)]()  2303-4008-0024 24 Tooth$11.09
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    ![2303 Series Steel, MOD 0.8 Pinion Gear (8mm REX™ Bore, 30 Tooth) 2303 Series Steel, MOD 0.8 Pinion Gear (8mm REX™ Bore, 30 Tooth)]()  2303-4008-0030 30 Tooth$11.79
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    ![2303 Series Steel, MOD 0.8 Pinion Gear (8mm REX™ Bore, 36 Tooth) 2303 Series Steel, MOD 0.8 Pinion Gear (8mm REX™ Bore, 36 Tooth)]()  2303-4008-0036 36 Tooth$12.59
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    ![2303 Series Steel, MOD 0.8 Pinion Gear (8mm REX™ Bore, 40 Tooth) 2303 Series Steel, MOD 0.8 Pinion Gear (8mm REX™ Bore, 40 Tooth)]()  2303-4008-0040 40 Tooth$12.99
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    ![2303 Series Steel, MOD 0.8 Pinion Gear (6mm D-Bore, 15 Tooth) 2303 Series Steel, MOD 0.8 Pinion Gear (6mm D-Bore, 15 Tooth)]()  2303-1006-0015 15 Tooth$9.99
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    ![2303 Series Steel, MOD 0.8 Pinion Gear (6mm D-Bore, 20 Tooth) 2303 Series Steel, MOD 0.8 Pinion Gear (6mm D-Bore, 20 Tooth)]()  2303-1006-0020 20 Tooth$10.59
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    ![2303 Series Steel, MOD 0.8 Pinion Gear (6mm D-Bore, 24 Tooth) 2303 Series Steel, MOD 0.8 Pinion Gear (6mm D-Bore, 24 Tooth)]()  2303-1006-0024 24 Tooth$11.09
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    ![2303 Series Steel, MOD 0.8 Pinion Gear (6mm D-Bore, 30 Tooth) 2303 Series Steel, MOD 0.8 Pinion Gear (6mm D-Bore, 30 Tooth)]()  2303-1006-0030 30 Tooth$11.79
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    ![2304-0006-0015 - 2304 Series Brass, MOD 0.8, Round Bore, Set Screw Pinion Gear (6mm Bore, 15 Tooth) 2304-0006-0015 - 2304 Series Brass, MOD 0.8, Round Bore, Set Screw Pinion Gear (6mm Bore, 15 Tooth)]()  2304-0006-0015 15 Tooth$7.99
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    ![2304-0006-0020 - 2304 Series Brass, MOD 0.8, Round Bore, Set Screw Pinion Gear (6mm Bore, 20 Tooth) 2304-0006-0020 - 2304 Series Brass, MOD 0.8, Round Bore, Set Screw Pinion Gear (6mm Bore, 20 Tooth)]()  2304-0006-0020 20 Tooth$8.59
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    ![2304-0006-0024 - 2304 Series Brass, MOD 0.8, Round Bore, Set Screw Pinion Gear (6mm Bore, 24 Tooth) 2304-0006-0024 - 2304 Series Brass, MOD 0.8, Round Bore, Set Screw Pinion Gear (6mm Bore, 24 Tooth)]()  2304-0006-0024 24 Tooth$9.09
Pinion Gears
The pinion gears here are able to mount on a shaft without the need for a hub. While pinion gears are most commonly associated with being the first gear in a geartrain, they certainly don’t have to be.
8mm REX™ Bore
If your build is going to take a beating, consider 8mm REX™. These gears are constructed of hardened steel and mount with two set screws for excellent hold on 8mm REX™ shafting.
6mm D-Bore
If you’re using a motor with a 6mm D-shaft as an output, or you have built your project using 6mm D-shafts as the axles, these D-bore gears match the shaft profile in order to create a positive drive between the shaft and the gear.
6mm Round Bore
A true maker is about integrating and repurposing. If the D-bore pinion gears just won’t fit your motor or axle that you’ve chosen to use in your project, check out these 6mm round bore gears.
 
     
     
     
     
     
     
     
     
     
     
    