30mm Axles | McMaster-Carr

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300 mm

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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.

Stainless steel shafts are more corrosion resistant than steel shafts but more difficult to machine. 303 stainless steel shafts have good corrosion resistance and are easier to machine than other types of stainless steel.

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

Metric—1566 Carbon Steel
Lg.	Lg. Tolerance	Straightness Tolerance	Edge Type	Hardness Rating	Hardness		Each
30mm Dia. (Tolerance: -0.102mm to 0mm)
200mm	-0.795mm to 0.795mm	0.3 mm per 300 mm	Chamfered	Hard	Rockwell C25	0000000	000000
400mm	-0.795mm to 0.795mm	0.3 mm per 300 mm	Chamfered	Hard	Rockwell C25	0000000	00000
500mm	-0.795mm to 0.795mm	0.3 mm per 300 mm	Chamfered	Hard	Rockwell C25	0000000	00000
1,000mm	-0.795mm to 0.795mm	0.3 mm per 300 mm	Chamfered	Hard	Rockwell C25	0000000	00000
1,200mm	-0.795mm to 0.795mm	0.3 mm per 300 mm	Chamfered	Hard	Rockwell C25	0000000	00000
1,500mm	-0.795mm to 0.795mm	0.3 mm per 300 mm	Chamfered	Hard	Rockwell C25	0000000	000000
Metric—303 Stainless Steel
30mm Dia. (Tolerance: -0.01mm to 0mm)
100mm	-0.25mm to 0.25mm	0.18 mm per 300 mm	Chamfered	Medium	Rockwell B83	0000000	00000
200mm	-0.25mm to 0.25mm	0.18 mm per 300 mm	Chamfered	Medium	Rockwell B83	0000000	00000
400mm	-0.25mm to 0.25mm	0.18 mm per 300 mm	Chamfered	Medium	Rockwell B83	0000000	000000
600mm	-0.25mm to 0.25mm	0.18 mm per 300 mm	Chamfered	Medium	Rockwell B83	0000000	000000
800mm	-0.25mm to 0.25mm	0.18 mm per 300 mm	Chamfered	Medium	Rockwell B83	0000000	000000
1,000mm	-0.25mm to 0.25mm	0.18 mm per 300 mm	Chamfered	Medium	Rockwell B83	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
30	-0.02 to 0	300	-0.05 to 0.05	300	4	26.8	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	0000000
30	-0.02 to 0	1,000	-0.08 to 0.08	1,000	4	26.8	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
30	-0.02 to 0	2,000	-0.08 to 0.08	2,000	4	26.8	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	00000000

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
30	4	80	47	Steel	Steel	4,150	2,716	Yes	Machine Key	2.5	42	4	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
30	4	80	75	47	Steel	Steel	4,150	2,716	Yes	4	000000000	0000000

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About Shafts

Rotary Shafts

Ball Splines and Bearings