38.1 mm Gears | McMaster-Carr

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	Number of Teeth Number of Teeth

9
10
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12
13
14
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16
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	System of Measurement System of Measurement

Metric

	For Shaft Diameter For Shaft Diameter

	For Maximum Shaft Diameter For Maximum Shaft Diameter

	For Roller Chain Strand Type For Roller Chain Strand Type


Single	Double

	Roller Chain Trade Size Roller Chain Trade Size

24B

	Pitch Pitch	Show

38.1 mm

	Pitch Pitch	Hide

	Specifications Met Specifications Met

ISO

DIN

	Overall Width Overall Width

	Bore Type Bore Type

Machinable

Bushing

	OD OD

	Roller Chain Standard Roller Chain Standard

ISO

DIN

	For Shaft Type For Shaft Type

	Round

	Material Material

Steel

	Sprocket Type Sprocket Type

Standard

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	ID ID

	Hub Diameter Hub Diameter

	For Bushing Type For Bushing Type

Taper Lock

	Teeth Heat Treatment Teeth Heat Treatment

Hardened

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106 Products

About Roller Chain and Sprockets

With metric teeth and slim profile, these sprockets allow your ISO roller chain to reach narrow spaces. They're commonly referred to as A-plate sprockets. Machine the unfinished bore to fit your shaft—sprockets come machined to the shaft diameter listed and are machinable up to the maximum shaft diameter size. Sprockets meet DIN 8187 and ISO 606, international standards for sprockets and roller chains.

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

For ISO 24B Roller Chain (38.1 mm Pitch)
Number of Teeth	For Shaft Dia., mm	For Max. Shaft Dia., mm	OD, mm	Overall Wd., mm	Material	Specifications Met		Each
9	20	69	127.25	25	Steel	DIN 8187, ISO 606	00000000	0000000
10	20	82	139.19	25	Steel	DIN 8187, ISO 606	00000000	000000
11	20	94	151.13	25	Steel	DIN 8187, ISO 606	00000000	000000
12	20	107	163.07	25	Steel	DIN 8187, ISO 606	00000000	000000
13	20	119	175.01	25	Steel	DIN 8187, ISO 606	00000000	000000
14	24	131	187.2	25	Steel	DIN 8187, ISO 606	00000000	000000
15	32	144	199.14	25	Steel	DIN 8187, ISO 606	00000000	000000
16	32	156	211.07	25	Steel	DIN 8187, ISO 606	00000000	000000
17	32	168	223.27	25	Steel	DIN 8187, ISO 606	00000000	000000
18	32	181	235.2	25	Steel	DIN 8187, ISO 606	00000000	000000
19	32	193	247.4	25	Steel	DIN 8187, ISO 606	00000000	000000
20	32	205	259.33	25	Steel	DIN 8187, ISO 606	00000000	000000
21	32	217	271.53	25	Steel	DIN 8187, ISO 606	00000000	000000
22	32	229	283.72	25	Steel	DIN 8187, ISO 606	00000000	000000
23	32	242	295.66	25	Steel	DIN 8187, ISO 606	00000000	000000
24	32	254	307.85	25	Steel	DIN 8187, ISO 606	00000000	000000
25	32	266	319.79	25	Steel	DIN 8187, ISO 606	00000000	000000
26	40	278	331.98	25	Steel	DIN 8187, ISO 606	00000000	000000
27	40	290	344.17	25	Steel	DIN 8187, ISO 606	00000000	000000
28	40	303	356.11	25	Steel	DIN 8187, ISO 606	00000000	000000
29	40	315	368.3	25	Steel	DIN 8187, ISO 606	00000000	000000
30	40	327	380.49	25	Steel	DIN 8187, ISO 606	00000000	000000
31	40	339	392.43	25	Steel	DIN 8187, ISO 606	00000000	000000
32	40	351	404.62	25	Steel	DIN 8187, ISO 606	00000000	000000
33	40	363	416.81	25	Steel	DIN 8187, ISO 606	00000000	000000
34	40	376	428.75	25	Steel	DIN 8187, ISO 606	00000000	000000
35	40	388	440.94	25	Steel	DIN 8187, ISO 606	00000000	000000
36	40	400	453.14	25	Steel	DIN 8187, ISO 606	00000000	000000
38	40	424	477.27	25	Steel	DIN 8187, ISO 606	00000000	000000
42	40	473	525.78	25	Steel	DIN 8187, ISO 606	00000000	000000
45	40	509	562.1	25	Steel	DIN 8187, ISO 606	00000000	000000
48	40	546	598.42	25	Steel	DIN 8187, ISO 606	00000000	000000
57	40	655	707.64	25	Steel	DIN 8187, ISO 606	00000000	000000
60	40	691	743.97	25	Steel	DIN 8187, ISO 606	00000000	000000
76	40	886	937.77	25	Steel	DIN 8187, ISO 606	00000000	00000000

Sprockets for Metric Roller Chain

Designed to meet ISO 606 and DIN 8187 international dimensional standards, these sprockets are for use with compatible ISO and DIN roller chain. They come machined to the shaft diameter size listed and are machinable up to the maximum shaft diameter size.

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

For DIN, ISO 24B Roller Chain (38.1 mm Pitch)
Number of Teeth	For Shaft Dia., mm	For Max. Shaft Dia., mm	OD, mm	Overall Wd., mm	Hub Dia., mm	Material	Specifications Met		Each
9	20	45	133.62	45	69	Steel	DIN 8187, ISO 606	00000000	0000000
10	20	52	145.52	45	80	Steel	DIN 8187, ISO 606	00000000	000000
11	25	60	157.46	50	90	Steel	DIN 8187, ISO 606	00000000	000000
12	25	67	169.43	50	102	Steel	DIN 8187, ISO 606	00000000	000000
13	25	76	181.43	50	114	Steel	DIN 8187, ISO 606	00000000	000000
14	32	86	193.44	60	127	Steel	DIN 8187, ISO 606	00000000	000000
15	32	92	205.48	60	140	Steel	DIN 8187, ISO 606	00000000	000000
16	32	92	217.52	60	140	Steel	DIN 8187, ISO 606	00000000	000000
17	32	92	229.57	60	140	Steel	DIN 8187, ISO 606	00000000	000000
18	32	92	241.63	60	140	Steel	DIN 8187, ISO 606	00000000	000000
19	32	92	253.7	60	140	Steel	DIN 8187, ISO 606	00000000	000000
20	32	92	265.78	60	140	Steel	DIN 8187, ISO 606	00000000	000000
21	32	92	277.86	60	140	Steel	DIN 8187, ISO 606	00000000	000000
22	32	92	289.94	60	140	Steel	DIN 8187, ISO 606	00000000	000000
23	32	92	302.03	60	140	Steel	DIN 8187, ISO 606	00000000	000000
24	32	92	314.12	60	140	Steel	DIN 8187, ISO 606	00000000	000000
25	32	92	326.21	60	140	Steel	DIN 8187, ISO 606	00000000	000000
26	40	102	338.31	65	150	Steel	DIN 8187, ISO 606	00000000	000000
27	40	102	350.41	65	150	Steel	DIN 8187, ISO 606	00000000	000000
28	40	102	362.51	65	150	Steel	DIN 8187, ISO 606	00000000	000000
29	40	102	374.61	65	150	Steel	DIN 8187, ISO 606	00000000	000000
30	40	102	386.72	65	150	Steel	DIN 8187, ISO 606	00000000	000000
31	40	102	398.83	65	150	Steel	DIN 8187, ISO 606	00000000	000000
32	40	102	410.93	65	150	Steel	DIN 8187, ISO 606	00000000	000000
33	40	102	423.04	65	150	Steel	DIN 8187, ISO 606	00000000	000000
34	40	102	435.15	65	150	Steel	DIN 8187, ISO 606	00000000	000000
35	40	102	447.26	65	150	Steel	DIN 8187, ISO 606	00000000	000000
36	40	102	459.37	65	152	Steel	DIN 8187, ISO 606	00000000	000000
38	40	102	483.6	65	152	Steel	DIN 8187, ISO 606	00000000	000000

Sprockets for Double-Strand Metric Roller Chain

The double row of teeth on these sprockets are designed to fit into metric ISO double-strand roller chain. They have an unfinished bore that’s machined to the shaft diameter size listed. Machine them to fit any shaft up to the maximum shaft diameter size. The extended hub makes these sprockets more stable and more durable than flat sprockets. They meet ISO 606 (formerly DIN 8187), which is an international standard for sprocket and roller chain dimensions and materials.

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

For ISO 24B Roller Chain (38.1 mm Pitch)
Number of Teeth	For Shaft Dia., mm	For Max. Shaft Dia., mm	OD, mm	Overall Wd., mm	Hub Dia., mm	Material	Specifications Met		Each
11	32	60	157.46	100	90	Steel	DIN 8187, ISO 606	00000000	0000000
12	32	67	169.43	100	102	Steel	DIN 8187, ISO 606	0000000	000000
13	32	76	181.43	100	114	Steel	DIN 8187, ISO 606	00000000	000000
14	32	84	193.45	100	128	Steel	DIN 8187, ISO 606	00000000	000000
15	32	93	205.48	100	140	Steel	DIN 8187, ISO 606	00000000	000000
16	32	100	217.52	100	150	Steel	DIN 8187, ISO 606	00000000	000000
17	40	100	229.57	100	150	Steel	DIN 8187, ISO 606	00000000	000000
18	40	108	241.63	100	160	Steel	DIN 8187, ISO 606	00000000	000000
19	40	108	253.7	100	160	Steel	DIN 8187, ISO 606	00000000	000000
20	40	108	256.78	100	160	Steel	DIN 8187, ISO 606	00000000	000000
21	40	108	277.86	100	160	Steel	DIN 8187, ISO 606	00000000	000000
22	40	108	289.94	102	160	Steel	DIN 8187, ISO 606	0000000	000000
23	40	108	302.03	102	160	Steel	DIN 8187, ISO 606	00000000	000000
24	40	108	314.12	102	160	Steel	DIN 8187, ISO 606	00000000	00000000
25	40	108	326.22	102	160	Steel	DIN 8187, ISO 606	00000000	00000000
26	40	108	338.31	102	160	Steel	DIN 8187, ISO 606	00000000	00000000
27	40	108	350.41	102	160	Steel	DIN 8187, ISO 606	00000000	00000000
28	40	108	362.51	102	160	Steel	DIN 8187, ISO 606	00000000	00000000
29	40	108	374.61	102	160	Steel	DIN 8187, ISO 606	00000000	00000000
30	40	108	386.72	102	160	Steel	DIN 8187, ISO 606	00000000	00000000
32	40	108	410.93	102	160	Steel	DIN 8187, ISO 606	00000000	00000000

Taper-Lock Bushing-Bore Sprockets for Metric Roller Chain

While their teeth fit into metric ISO roller chain, these sprockets use taper-lock bushings to grip shafts. That means you can switch to a different diameter shaft by changing the bushing instead of machining the sprocket. Bushings mount flush inside these sprockets; secure them in place by tightening the set screws included with the bushings. These sprockets have an extended hub that makes them more stable and durable than flat sprockets. All meet ISO 606 (formerly DIN 8187), which is an international standard for sprocket and roller chain dimensions and materials.

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

For Single-Strand Roller Chain

For ISO 24B Roller Chain (38.1 mm Pitch)
Number of Teeth	For Bushing Style	OD, mm	Overall Wd., mm	Hub Dia., mm	Teeth Heat Treatment	Material	Specifications Met		Each
11	2012	151.13	32	90.49	Hardened	Steel	DIN 8187, ISO 606	00000000	0000000
12	2012	163.07	32	90.49	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
13	2517	175.01	44	107.95	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
14	2517	187.2	44	107.95	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
15	2517	199.14	44	107.95	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
16	3020	211.07	51	133.35	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
17	3020	223.27	51	133.35	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
18	3020	235.2	51	133.35	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
19	3020	247.4	51	133.35	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
20	3020	259.33	51	133.35	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
21	3020	271.53	51	133.35	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
22	3020	283.72	51	133.35	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
23	3020	295.66	51	133.35	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
24	3020	307.85	51	133.35	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
25	3020	319.79	51	133.35	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
26	3020	331.98	51	133.35	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
27	3020	344.17	51	133.35	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
28	3020	356.11	51	133.35	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
29	3020	368.3	51	133.35	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
30	3020	380.49	51	133.35	Hardened	Steel	DIN 8187, ISO 606	00000000	000000
32	3020	404.62	51	133.35	__	Steel	DIN 8187, ISO 606	00000000	000000

About Roller Chain and Sprockets

Flat Sprockets for Metric Roller Chain

Sprockets for Metric Roller Chain

Sprockets for Double-Strand Metric Roller Chain

Taper-Lock Bushing-Bore Sprockets for Metric Roller Chain