46 mm OD Sprockets | McMaster-Carr

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About Gears

MXL Series Lightweight Timing Belt Pulleys

Made from polycarbonate, these pulleys are useful in applications with weight constraints. All are MXL series (miniature extra light) and have trapezoidal teeth. The teeth match up with the grooves along the inside diameter of a timing belt in order to move components forward or backward. Select a pulley with a maximum belt width that’s the same or larger than your timing belt width.

For technical drawings and 3-D models, click on a part number.

Press-Fit Mount

With Hub and Two Flanges (18 Teeth or More)

With Hub and Two Flanges (18 Teeth or More)

												2 Flanges
OD	Number of Teeth	Pitch	For Shaft Dia.	Bore Type	Inside Wd.	Outside Wd.	Overall Wd.	Pitch Dia.	Fabrication	Material	Hub Dia.		Each
For 6 mm Max. Belt Wd.
46mm	65	2.030mm	8mm	Finished	8mm	11.2mm	17.5mm	42mm	Molded	Polycarbonate	17.5mm	0000000	000000

High-Power Metal Gears

Parallel Gear on Gear Rack (Sold Separately)

Gear with Round Bore

The helical teeth on these gears stay in contact for longer than straight teeth, which allows them to transmit higher loads at higher speeds than spur gears.

For gears to mesh correctly, they must have the same pressure angle and pitch. All of these gears transmit motion in a straight line—make sure to get one left-hand and one right-hand gear. To change speed and torque in your assembly, pair two gears with different numbers of teeth.

Parallel helical components have a 21 1/2° helix angle so they only transmit motion in a straight line since the helix angle is so small. Made from alloy steel, these gears resist abrasion and are stronger than carbon steel gears. Their teeth are ground, so they're more precise than gears with rolled teeth. Pair them with a rack or a gear that has a different tooth direction.

Gears with hardened teeth have better wear resistance than gears with teeth that are not hardened.

For technical drawings and 3-D models, click on a part number.

Metric Parallel Gears—20° Pressure Angle

									Hub
Module	Number of Teeth	Helix Angle	Gear Pitch Dia., mm	OD, mm	Face Wd., mm	Overall Wd., mm	For Shaft Dia., mm	Teeth Heat Treatment	Dia., mm	Wd., mm		Each
Left Hand
Round Bore—4140 Alloy Steel
1	44	21 1/2°	44	46	8	18	10	Hardened	30	10	00000000	0000000
Right Hand
Round Bore—4140 Alloy Steel
1	44	21 1/2°	44	46	8	18	10	Hardened	30	10	00000000	000000

Metal Worms and Worm Gears

Worm and Gear Sold Separately

Worm gears use screw threads to make large reductions to shaft speed while transmitting motion at a right angle. They transmit motion from worm to gear and cannot be reversed. For gears and worms to mesh correctly, they must have the same pressure angle and pitch/module. These worms are compatible with plastic worm gears.

Speed ratio is the ratio by which output shaft speed is reduced. As speed decreases, torque increases.

Cast iron gears are strong and durable.

For technical drawings and 3-D models, click on a part number.

Metric Worm Gears

Gear

										Hub
Module	Speed Ratio	Number of Teeth	Pressure Angle	Gear Pitch Dia., mm	For Number of Thread Starts	OD, mm	Face Wd., mm	Overall Wd., mm	For Shaft Dia., mm	Dia., mm	Wd., mm	Material	For Thread Direction	Teeth Heat Treatment	Teeth Fabrication		Each
Round Bore—Cast Iron
2	20:1	20	14 1/2°	40	1	46	22	35	12	33	13	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	000000
2	10:1	20	14 1/2°	40	2	46	22	35	12	33	13	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	00000

Metal Bevel Gears

Gear and Pinion Sold Separately

Gear

A type of miter gear where one gear (sometimes called a pinion) is smaller than the other, bevel gears provide right-angle speed reduction at speed ratios ranging from 2:1 to 5:1. All are carbon steel for strength; they're compatible with plastic bevel gears. Teeth are not hardened so you can harden them to fit your application. Hardening a gear’s teeth increases its wear resistance.

A complete set consists of a gear and pinion (sold separately). For a gear and pinion to mesh correctly, they must have the same pressure angle, pitch/module, and face width. Speed ratio is the ratio by which shaft speed is reduced when transferring motion from pinion to gear. To increase shaft speed, transfer motion from gear to pinion. Changing shaft speed also changes torque: as speed decreases, torque increases.

For technical drawings and 3-D models, click on a part number.

Metric Gears

										Hub
Face Wd., mm	Module	Pressure Angle	Speed Ratio	Number of Teeth	Gear Pitch Dia., mm	OD, mm	Overall Wd., mm	For Shaft Dia., mm	Mounting Distance (A), mm	Dia., mm	Wd., mm	Material		Each
Round Bore
8	1.5	20°	2:1	30	45	46	18	8	25	25	9	Black-Oxide 1045 Carbon Steel	00000000	000000

Metric Pinions

Pinion

										Hub
Face Wd., mm	Module	Pressure Angle	Speed Ratio	Number of Teeth	Gear Pitch Dia., mm	OD, mm	Overall Wd., mm	For Shaft Dia., mm	Mounting Distance (B), mm	Dia., mm	Wd., mm	Material		Each
Round Bore
8	1.5	20°	2:1	15	23	26	17	6	32	16	8	Black-Oxide 1045 Carbon Steel	00000000	000000