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 12B Roller Chain (19.05 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
19	16	60	127.49	35	90	Steel	DIN 8187, ISO 606	00000000	000000
20	16	64	133.52	35	90	Steel	DIN 8187, ISO 606	00000000	00000
For DIN, ISO 20B Roller Chain (31.75 mm Pitch)
12	25	76	143.31	48	90	Steel	DIN 8187, ISO 606	00000000	000000
For DIN, ISO 24B Roller Chain (38.1 mm Pitch)
11	25	60	157.46	50	90	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 06B Roller Chain (9.53 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
36	16	60	114.84	30	90	Steel	DIN 8187, ISO 606	0000000	0000000
38	16	60	120.9	30	90	Steel	DIN 8187, ISO 606	00000000	000000
42	19	60	133.02	35	90	Steel	DIN 8187, ISO 606	00000000	000000
45	19	60	142.1	35	90	Steel	DIN 8187, ISO 606	00000000	000000
48	19	60	151.19	35	90	Steel	DIN 8187, ISO 606	00000000	000000
52	19	60	163.31	35	90	Steel	DIN 8187, ISO 606	00000000	000000
57	19	60	178.46	35	90	Steel	DIN 8187, ISO 606	00000000	000000
68	19	60	211.79	35	90	Steel	DIN 8187, ISO 606	00000000	000000
72	19	60	223.92	35	90	Steel	DIN 8187, ISO 606	00000000	000000
76	19	60	230.05	38	90	Steel	DIN 8187, ISO 606	00000000	000000
84	19	60	260.3	38	90	Steel	DIN 8187, ISO 606	0000000	000000
For ISO 08B Roller Chain (12.7 mm Pitch)
28	20	60	120.8	40	90	Steel	DIN 8187, ISO 606	00000000	000000
For ISO 10B Roller Chain (15.88 mm Pitch)
22	16	60	121.23	45	90	Steel	DIN 8187, ISO 606	00000000	000000
For ISO 20B Roller Chain (31.75 mm Pitch)
12	20	60	143.31	80	90	Steel	DIN 8187, ISO 606	0000000	000000
For ISO 24B Roller Chain (38.1 mm Pitch)
11	32	60	157.46	100	90	Steel	DIN 8187, ISO 606	00000000	000000

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 08B Roller Chain (12.7 mm Pitch)
Number of Teeth	For Bushing Style	OD, mm	Overall Wd., mm	Hub Dia., mm	Material	Specifications Met		Each
70	2012	289.81	32	90	Steel	DIN 8187, ISO 606	00000000	0000000
72	2012	297.94	32	90	Steel	DIN 8187, ISO 606	00000000	000000
76	2012	314.2	32	90	Steel	DIN 8187, ISO 606	00000000	000000
80	2012	330.45	32	90	Steel	DIN 8187, ISO 606	00000000	000000
84	2012	346.46	32	90	Steel	DIN 8187, ISO 606	00000000	000000
95	2012	390.91	32	90	Steel	DIN 8187, ISO 606	00000000	000000
96	2012	394.97	32	90	Steel	DIN 8187, ISO 606	00000000	000000

High-Power Metal Gears

Crossed Right-Hand Gear
and Crossed Left-Hand
Gear (Sold Separately)

Two Crossed Gears with
Right-Hand Teeth
(Sold Separately)

Standard 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.

Standard 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.

Crossed helical gears, also known as screw gears, can be configured to transmit motion at a 90° angle. To transmit motion at a 90° angle, pair two gears with the same tooth direction. To avoid wearing down gears, which happens when you use the same material, we recommend mating gears with different materials. Carbon steel gears are stronger than 303 stainless steel gears but are not as corrosion resistant.

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 Standard 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
2	90	21 1/2°	180	184	16	29	25	Hardened	90	13	00000000	0000000
Right Hand
Round Bore—4140 Alloy Steel
2	90	21 1/2°	180	184	16	29	25	Hardened	90	13	00000000	000000

Metric Crossed 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—Black-Oxide 1045 Carbon Steel
3	30	45°	127	133.28	25	43	20	Not Hardened	90	18	00000000	0000000
4	20	45°	113	121.14	30	50	20	Not Hardened	90	20	00000000	000000
Right Hand
Round Bore—Black-Oxide 1045 Carbon Steel
3	30	45°	127	133.28	25	43	20	Not Hardened	90	18	00000000	000000
4	20	45°	113	121.14	30	50	20	Not Hardened	90	20	00000000	000000

Metal Ratcheting Gears

Pawl and Gear Sold Separately

Compared to plastic gears, these metal ratcheting gears are better for high-load, high-speed, and heavy duty applications. Used to prevent unwanted motion in jacks, tie downs, clutches, and winches, ratchet gears have sloped teeth that allow motion in one direction and prevent it in the other.

Gears with hardened teeth are more wear resistant than gears with teeth that are not hardened.

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

Gears

								Hub
Face Wd.	Number of Teeth	OD	For Shaft Dia.	Mounting Distance	Material	Teeth Heat Treatment	Overall Wd.	Dia.	Wd.		Each
Round Bore
25mm	30	120mm	20mm	95.7mm	1045 Carbon Steel	Hardened	43 mm	90 mm	18 mm	00000000	0000000
25mm	40	160mm	20mm	108mm	1045 Carbon Steel	Hardened	43 mm	90 mm	18 mm	00000000	000000