40mm Axles | McMaster-Carr

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17 Products

About Shafts

Combine these general purpose drive shafts with gears, sprockets, and bearings to transmit rotary motion. All are turned, precision ground, and polished to meet tight diameter and straightness tolerances. This means these shafts evenly distribute loads, reduce vibration, and improve accuracy and stability.

Steel shafts are generally stronger than stainless steel shafts but not as corrosion resistant. Carbon steel shafts balance high strength and good machinability, making them ideal for general purpose use.

Shafts with chamfered edges reduce damage to bearings, housings, and other components during installation.

Metric—1045 Carbon Steel
Lg.	Lg. Tolerance	Straightness Tolerance	Edge Type	Hardness Rating	Hardness		Each
40mm Dia. (Tolerance: -0.051mm to 0mm)
200mm	-1.57mm to 1.57mm	0.3 mm per 300 mm	Chamfered	Medium	Brinell 197	0000000	000000
400mm	-1.57mm to 1.57mm	0.3 mm per 300 mm	Chamfered	Medium	Brinell 197	0000000	00000
500mm	-1.57mm to 1.57mm	0.3 mm per 300 mm	Chamfered	Medium	Brinell 197	0000000	00000
1,000mm	-1.57mm to 1.57mm	0.3 mm per 300 mm	Chamfered	Medium	Brinell 197	0000000	000000
1,200mm	-1.57mm to 1.57mm	0.3 mm per 300 mm	Chamfered	Medium	Brinell 197	0000000	000000
1,500mm	-1.57mm to 1.57mm	0.3 mm per 300 mm	Chamfered	Medium	Brinell 197	0000000	000000
2,000mm	-1.57mm to 1.57mm	0.3 mm per 300 mm	Chamfered	Medium	Brinell 197	0000000	000000

Keyed Rotary Shafts

Combine these shafts with a machine key (not included) to transmit torque to gears, sprockets, and other power transmission components. All have an ANSI standard keyway (keys not included; see our selection of key stock). Their edges are chamfered to remove sharp corners, reducing damage to bearings, housings, and other components during installation. All are turned, ground, or polished to tight diameter and straightness tolerances.

Steel shafts are generally stronger than aluminum and stainless steel shafts but not as corrosion resistant. 1045 carbon steel shafts balance high strength and good machinability, making them ideal for general purpose use.

	Keyway
Lg.	Lg.	Wd.	Dp.	ANSI Keys Included	Straightness Tolerance	Edge Type	Hardness Rating	Hardness		Each
Metric—1045 Carbon Steel
40mm Dia. (Tolerance: -0.076mm to 0mm)
300mm	300mm	12mm	5mm	No	0.33 mm per 300 mm	Chamfered	Medium	Rockwell B95	00000000	0000000
500mm	500mm	12mm	5mm	No	0.33 mm per 300 mm	Chamfered	Medium	Rockwell B95	00000000	000000
1,000mm	1,000mm	12mm	5mm	No	0.33 mm per 300 mm	Chamfered	Medium	Rockwell B95	00000000	000000
1,200mm	1,200mm	12mm	5mm	No	0.33 mm per 300 mm	Chamfered	Medium	Rockwell B95	00000000	000000
1,500mm	1,500mm	12mm	5mm	No	0.33 mm per 300 mm	Chamfered	Medium	Rockwell B95	00000000	000000
1,800mm	1,800mm	12mm	5mm	No	0.33 mm per 300 mm	Chamfered	Medium	Rockwell B95	0000000	000000

Ball Splines and Bearings

Create a compact linear and rotary motion system for applications requiring complex, fast movements, such as robotics. The grooves on the ball splines transmit rotary power as ball bearings move smoothly and precisely along their length, even at high speeds.

Ball splines are alloy steel for high strength and wear resistance. They're hardened on the outside for additional wear resistance while the center is soft enough to absorb stress from shifting loads.

Bearings have a retaining ring groove, so they can be positioned in your system with a retaining ring (not included). Bearings with a keyway include a machine key for attaching your load. Flanged bearings have a surface with mounting holes for attaching your load.

Ball Splines

Splined on Both Ends

Four Splines

				Spline
Dia., mm	Dia. Tolerance, mm	Lg., mm	Lg. Tolerance, mm	Lg., mm	No. of	Root Dia., mm	Surface Smoothness, microinch	Edge Type	Hardness Rating	Hardness	Heat Treatment		Each
Metric—52100 Alloy Steel
Splined on Both Ends
40	-0.02 to 0	400	-0.05 to 0.05	400	4	35.5	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	0000000
40	-0.02 to 0	700	-0.08 to 0.08	700	4	35.5	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000

Bearings

				Material						Keyway
For Spline Dia., mm	For No. of Splines	Overall Lg., mm	OD, mm	Bearing	Ball	Dynamic Load Cap., lbs.	Max. Dynamic Torque, in.-lbs.	With Retaining Ring Grooves	Includes	Dp., mm	Lg., mm	Wd., mm		Each
40	4	100	64	Steel	Steel	6,900	5,964	Yes	Machine Key	3.5	52	6	00000000	0000000

Flanged Bearings

					Material
For Spline Dia., mm	For No. of Splines	Overall Lg., mm	Flange OD, mm	OD, mm	Bearing	Ball	Dynamic Load Cap., lbs.	Max. Dynamic Torque, in.-lbs.	With Retaining Ring Grooves	Number of Mounting Holes		Each
40	4	100	100	64	Steel	Steel	6,900	5,964	Yes	4	000000000	0000000