Aluminum-Bronze Gears | McMaster-Carr

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	Component Component

	Gear

	System of Measurement System of Measurement

Metric

	For Shaft Diameter For Shaft Diameter

	Gear Type Gear Type

	Worm

	Material Material	Show

Aluminum-Bronze

	Material Material	Hide

	Speed Ratio Speed Ratio

	Module Module

	Pressure Angle Pressure Angle

20°

	Number of Teeth Number of Teeth

	Hub Material Hub Material

Cast Iron

Aluminum-Bronze

	Pitch Diameter Pitch Diameter

	For Number of Thread Starts For Number of Thread Starts

	For Thread Direction For Thread Direction

Right Hand

	Face Width Face Width

	Overall Width Overall Width

	OD OD

	Hub Diameter Hub Diameter

	Hub Width Hub Width

	Teeth Heat Treatment Teeth Heat Treatment

Not Hardened

	Teeth Fabrication Teeth Fabrication

Not Ground

	Bore Type Bore Type

	Round

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52 Products

About 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.

Aluminum-bronze gears have excellent wear resistance.

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	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—Aluminum-Bronze
0.5	15:1	30	20°	15	2	16	5	12	4	12	7	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
0.5	20:1	20	20°	10	1	11	5	12	4	9	7	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
0.5	30:1	30	20°	15	1	16	5	12	4	12	7	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
0.5	40:1	40	20°	20	1	21	5	12	5	15	7	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
0.5	50:1	50	20°	25	1	26	5	12	5	20	7	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
0.5	60:1	60	20°	30	1	31	5	12	5	25	7	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
0.5	10:1	20	20°	10	2	11	5	12	4	9	7	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
0.8	15:1	30	20°	24	2	25.6	8	16	5	18	8	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
0.8	20:1	20	20°	16	1	17.6	8	16	5	12	8	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
0.8	30:1	30	20°	24	1	25.6	8	16	5	18	8	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
0.8	40:1	40	20°	32	1	33.6	8	16	6	20	8	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
0.8	50:1	50	20°	40	1	41.6	8	16	8	25	8	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
0.8	60:1	60	20°	48	1	49.6	8	16	8	25	8	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
0.8	10:1	20	20°	16	2	17.6	8	16	5	12	8	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
1	15:1	30	20°	30	2	33	10	20	6	20	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
1	20:1	20	20°	20	1	23	10	20	6	16	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
1	30:1	30	20°	30	1	33	10	20	6	20	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
1	40:1	40	20°	40	1	43	10	20	8	26	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
1	50:1	50	20°	50	1	53	10	20	8	30	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
1	60:1	60	20°	60	1	63	10	20	10	35	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
1	10:1	20	20°	20	2	23	10	20	6	16	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
1.5	15:1	30	20°	45	2	49.5	14	24	10	30	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
1.5	20:1	20	20°	30	1	34.5	14	24	8	22	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
1.5	30:1	30	20°	45	1	49.5	14	24	10	30	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
1.5	40:1	40	20°	60	1	64.5	14	24	12	35	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
1.5	50:1	50	20°	75	1	79.5	14	24	12	45	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
1.5	60:1	60	20°	90	1	94.5	14	24	12	50	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
1.5	10:1	20	20°	30	2	34.5	14	24	8	22	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
2	36:1	36	20°	72	1	78	18	35	12	40	12	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
2	25:1	25	20°	50	1	54	18	35	12	35	12	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
2	48:1	48	20°	96	1	104	18	35	12	50	12	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	000000
2	15:1	30	20°	60	2	64	18	35	12	38	12	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
2	15:1	30	20°	60	2	66	18	33	12	40	15	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	000000
2	20:1	20	20°	40	1	44	18	35	12	32	12	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
2	20:1	20	20°	40	1	46	18	33	12	33	15	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
2	30:1	30	20°	60	1	64	18	35	12	38	12	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
2	30:1	30	20°	60	1	66	18	33	12	40	15	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	000000
2	40:1	40	20°	80	1	84	18	35	12	45	12	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	000000
2	40:1	40	20°	80	1	86	18	33	12	45	15	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	000000
2	50:1	50	20°	100	1	104	18	35	12	50	12	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	000000
2	50:1	50	20°	100	1	106	18	33	12	50	15	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	000000
2	60:1	60	20°	120	1	124	18	35	12	50	12	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	000000
2	60:1	60	20°	120	1	126	18	33	12	55	15	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	000000
2	10:1	20	20°	40	2	44	18	35	12	32	12	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
2	10:1	20	20°	40	2	46	18	33	12	33	15	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
2.5	15:1	30	20°	75	2	82.5	20	34	12	40	14	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	000000
2.5	20:1	20	20°	50	1	57.5	20	34	12	35	14	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
2.5	30:1	30	20°	75	1	82.5	20	34	12	40	14	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	000000
2.5	40:1	40	20°	100	1	107.5	20	34	15	45	14	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	000000
2.5	50:1	50	20°	125	1	132.5	20	34	15	55	14	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	000000
2.5	60:1	60	20°	150	1	157.5	20	34	15	60	14	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	000000
2.5	10:1	20	20°	50	2	57.5	20	34	12	35	14	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000

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About Gears

Metal Worms and Worm Gears