2 3/4" ID Sprockets | McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	For Shaft Diameter For Shaft Diameter

2 3/4"

	ID ID	Show

2 3/4"

	ID ID	Hide

	Inside Width Inside Width

14.48 mm

24.64 mm

46.23 mm

	For Maximum Belt Width For Maximum Belt Width

12 mm

21 mm

40 mm

	Number of Teeth Number of Teeth

	Mount Type Mount Type

	Bushing

	Pitch Pitch

8 mm

14 mm

	Material Material

Steel

Iron

	Teeth Shape Teeth Shape

	Curved

	Shaft Mount Type Shaft Mount Type

	Clamp On

	For Shaft Type For Shaft Type

	Keyed

	Bushing Type Bushing Type

Quick Disconnect

Taper Lock

	Overall Width Overall Width

2 1/2"

31.75mm

54.1 mm

	For Belt Trade Size For Belt Trade Size

GT2

GT3

	Outside Width Outside Width

21.59 mm

31.75 mm

54.1 mm

	OD OD

124.46 mm

	Fabrication Fabrication

Machined

Cast

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

DFARS Specialty Metals
COTS-Exempt

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Bore Type Bore Type


Finished	Plain

	Finish Finish

Black Oxide

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5 Products

Quick-Disconnect (QD) Bushings

Clamp On

The screw connections on these bushings easily mate to compatible quick-disconnect sprockets and pulleys. Bushings fit quick-disconnect (QD) sprockets and pulleys of the same bushing style. As you tighten the included screws, the bushing grips the shaft and pulls it into the sprocket or pulley.

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

		Keyway
For Shaft Dia.	Overall Wd.	Wd.	Dp.	Fastener Tightening Torque, in.-lbs.	Material	Includes		Each
Clamp On
SF Style Bushing
2 3/4"	2 1/2"	5/8"	1/16"	360	Cast Iron	Clamping Screws, Machine Key	00000000	000000

Taper-Lock Bushings

Mount these hubless bushings flush into your sprocket or pulley for a slim profile with no protruding screws. They are for use with taper-lock sprockets of the same bushing style. As you tighten the included set screws, the bushing grips the shaft and pulls it into your sprocket or pulley.

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

		Keyway
For Shaft Dia.	Overall Wd.	Wd.	Dp.	Taper	Fastener Tightening Torque, in.-lbs.	Material	Includes		Each
3020 Style Bushing
2 3/4"	2"	5/8"	5/16"	8°	800	Steel	Set Screws	000000000	000000

High-Strength GT Timing Belt Pulleys

For higher speed or higher torque applications, these GT series timing belt pulleys provide a more precise fit than HTD pulleys. Use them where accuracy is critical, such as in storage and retrieval systems or in robotics. Similar to HTD timing belt pulleys, their teeth are curved for high strength. The curved teeth create positive grip engagement with timing belts, so these pulleys do not require re-tensioning—unlike drives using V-belts or sheaves. And unlike chain drives, there’s no metal-on-metal contact, so these pulleys don’t require lubrication.

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

Bushing Mount

Without Hub—Two Flanges

For 40 mm Maximum Belt Width
Number of Teeth	Pitch, mm	ID	Bore Type	For Bushing Style	Inside Width, mm	Outside Width, mm	Overall Width, mm	Pitch Diameter, mm	Number of Flanges	Fabrication	Material		Each
28	14	2.75"	Plain	Taper-Lock Style 2012	46.23	54.1	54.1	124.765	2	Machined	Black-Oxide Iron	00000000	0000000

Ultra-High-Strength Poly Chain Timing Belt Pulleys

Curved teeth with a high pitch provide superior load distribution and reduce wear. They mount with a bushing for a more secure grip on the shaft than set screws. Bushing is not included. 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.

Bushing Mount

For 12 mm Max. Belt Wd.
OD, mm	Number of Teeth	Pitch, mm	ID	Bore Type	For Bushing Style	Inside Wd., mm	Outside Wd., mm	Overall Wd., mm	Pitch Dia., mm	Number of Flanges	Fabrication	Material		Each
124.46	45	8	2.75"	Finished	Taper-Lock Style 2012	14.48	21.59	31.75	115	2	Machined	Black-Oxide Steel	0000000	0000000
For 21 mm Max. Belt Wd.
124.46	45	8	2.75"	Finished	Taper-Lock Style 2012	24.64	31.75	31.75	115	2	Machined	Black-Oxide Steel	0000000	000000