Drive Reducers | McMaster-Carr

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System of Measurement

Shaft Diameter

Length

Material

Screw Size

Shaft Type

Overall Length

Construction

Shaft Mount Type

For Shaft Misalignment Type

RoHS

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

DFARS Specialty Metals

Compliant

Exempt

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Export Control Classification Number (ECCN)

Square Drive Size

Thread Size

Keyway Width

For Rotary Motion

Finish

Magnesium Phosphate Coated

Zinc Yellow-Chromate Plated

Maximum Rotation Speed

Shaft Coupling Flexibility

Performance

Electrically Insulating

Maximum Torque

Less than 1,000 in·lbf

1,000 in·lbf to 1,999 in·lbf

2,000 in·lbf to 9,999 in·lbf

10,000 in·lbf to 19,999 in·lbf

20,000 in·lbf or greater

5,128 Products

Socket Adapters

Impact Socket Adapters

Impact Square Drive Size Adapters

Convert from one square drive size to another

23 products

Impact Spline Drive to Square Drive Adapters

Attach your square-drive impact socket to a spline-drive impact wrench

2 products

Impact Square Drive Size Adapter Sets

Keep a range of adapter sizes on hand to convert your impact tools from one square drive size to another

4 products

Impact Quick-Change Socket Adapters

Pull the collar to quickly attach and remove sockets

7 products

Impact Square Drive Adapter Sets for Power Tools

Keep a range of adapter sizes on hand to attach impact square-drive sockets to hex-shank power tools

1 product

Impact Magnetic Square Drive Size Adapters

A magnet holds the socket, making changes quicker

3 products

Impact Square Drive Adapters for Air Hammers

Combine air-hammer pulses and a hand wrench to loosen stuck fasteners without breaking them

2 products

Impact Square Drive Adapters for Power Tools

Attach impact square-drive sockets to power drills, impact drivers, and other hex-shank tools

14 products

Impact Flex Socket Adapters

Convert your impact socket into a flex socket to access fasteners from an angle

15 products

Impact Torque-Limiting Socket Adapters

Prevent overtightening that can damage fasteners

5 products

Impact Flex Socket Adapter Sets

Keep a range of adapter sizes on hand to convert impact sockets into flex sockets

1 product

Impact Torque-Limiting Socket Adapter Sets

Keep a range of adapter sizes on hand and prevent overtightening that can damage fasteners

1 product

Socket Adapters

Square Drive Size Adapters

Convert from one square drive size to another

17 products

Square Drive Size Adapter Sets

Keep a range of adapter sizes on hand to convert from one square drive size to another

5 products

Dual-Drive Socket Adapter Sets

A hex-shaped base fits into a ratchet wrench or open-end or box wrench for additional leverage

1 product

Ratcheting Socket Adapters

Change a standard wrench handle into a ratcheting wrench

3 products

Torque-and-Angle Measuring Socket Adapters

A digital display shows how torque measurements change as you turn the wrench

2 products

Fixed Torque-Limiting Socket Adapters

Come set to a specific torque limit for tasks needing the same torque every time

32 products

Square Drive Adapters for Power Tools

Attach square-drive sockets to drills, powered screwdrivers, and other hex-shank tools

15 products

Flex Socket Adapters

Convert your socket into a flex socket to access fasteners from an angle

12 products

Adjustable Torque-Limiting Socket Adapters

Set a desired torque to prevent overtightening and damaging fasteners

13 products

Finger-Tightening Socket Adapters

Fit between a wrench and socket, and spin the adapter with a finger to tighten

6 products

Hex Shank to Square Drive Adapters

Install in your bit screwdriver to turn sockets

5 products

Electrically-Insulating Square Drive Size Adapters

Insulated to protect against shock from accidental contact with live circuits

3 products

Square Drive Adapters for Box Wrenches

Convert a ratcheting box wrench into a ratcheting socket wrench

3 products

Strong-Hold Flex Socket Adapters

Convert your socket into a flex socket without worrying about the adapter falling off

3 products

Strong-Hold Socket Adapters

Lock to your tool and socket to prevent accidental disengagement

3 products

Convertible Square Drive Size Adapters

Push the square drive through the adapter to change size

1 product

Electrically-Insulating Hex Shank to Square Drive Adapters

Turn sockets with a bit screwdriver and avoid accidental electrical shock

1 product

Flex Socket Adapter Sets

Keep a range of adapter sizes on hand to convert sockets into flex sockets

1 product

Square Drive Adapter Sets for Power Tools

Keep a range of adapter sizes on hand to attach sockets to hex-shank power tools

1 product

Continuous-Use Socket Adapters

Continuous-Use Square Drive Size Adapters

Last longer than standard impact adapters to tolerate high-volume applications

10 products

Continuous-Use Square Drive Adapters for Power Tools

Connect sockets to impact wrenches and other power tools in high-volume applications

3 products

Other Products

Electric Gearmotors

A motor and speed reducer in one to slow speed and increase torque in AC- or DC- power applications

304 products

Gear Boxes

Transmit rotary motion without changing speed, or reduce speed while increasing torque

187 products

Flexible Shaft Couplings

Connect two shafts that are misaligned to transfer rotary motion from one to the other

1,628 products

Spacers

Unthreaded to create space between two surfaces or objects, often to align them

1,830 products

Rigid Shaft Couplings

Join two shafts that are aligned and handle higher torque than flexible shaft couplings

554 products

Pulley and Sprocket Bushings

Mount between a rotating shaft and equipment to secure the shaft and reduce vibration

118 products

Machinable Shaft Ends

Mill custom pulleys, threaded hubs, sprockets, collars, and sensor targets and mount them to shafts

56 products

Shaft Adapters

Increase or reduce your shaft's diameter to fit equipment, or replace damaged shaft ends

54 products

V-Belt Drive Pulleys

Pair with a V-belt to transfer motion from a rotating shaft

53 products

Socket Nuts

Install in recessed holes and tight spots where a wrench won’t fit; also known as Allen nuts

36 products

Bore Reducers

Adapt the bore of a component to a smaller size for mounting on a shaft

31 products

Wheel Reducer Bushings

Reduce the inside diameter of a bearing to fit a particular axle size

20 products

Studs

Press, weld, or screw in place to add a threaded fastening point

13 products

Saw Blade Bushings

Shrink the diameter of your saw blade's arbor hole to fit your saw's arbor

7 products

Gear Box Shafts

Convert output drives from female to male

6 products

Rod Ends

Use with connecting rods to support loads and control steering, tensioning, or pivoting motion

6 products

Socket Extensions

Lengthen sockets to turn hard-to-reach fasteners

7 products

Standoffs

Separate, position, or connect components in assemblies

6 products

Grinding Wheel Reducer Bushings

Connect grinding wheels to shanks with a smaller diameter

3 products

Screw-Mount Nuts

Mount with screws, rivets, and nails to add threads to a surface

3 products

Wrench Heads

Attach to your ratchet wrench and socket extension to turn fasteners where clearance is limited

2 products