1"-4 Ball Screws | McMaster-Carr

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Thread Size

Component

Length

Thread Direction

Nut Type

Number of Thread Starts

Travel Distance per Turn

1/4"

0.274"

0.5"

System of Measurement

Diameter

Thread Type

Threading

Root Diameter

Material

Dynamic Thrust Load Capacity

Less than 1,000 lb.

1,000 lb. to 1,999 lb.

2,000 lb. to 9,999 lb.

Maximum Temperature

300° F

REACH

Compliant

RoHS

Compliant

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

Hardness

Minimum Temperature

Thread Fabrication

Flange Diameter

Tensile Strength

80,000 psi to 99,999 psi

100,000 psi or greater

Number of Mounting Holes

External Thread Size

41 Products

Selecting Compatible Lead Screws and Nuts

Internal ball bearings provide smooth low-friction travel in applications that require high speeds, accurate positioning, and repeatable movement. Also known as single-start ball screws and nuts, they have a single thread that runs the length of the screw. They operate with more torque than fast-travel ball screws and nuts. To ensure compatibility, select components that have the same thread direction and size. Ball nuts are furnished with a tube to keep ball bearings in place. Do not remove the tube until you are ready to install the nuts onto the screws.

Black-oxide alloy steel ball screws and nuts have mild corrosion resistance.

Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.

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

Ball Screws—Right-Hand Threaded

Root diameter indicates the diameter the ball screw will be after machining away the threads.

Alloy Steel
Thread Size	Lg.	No. of Thread Starts	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Root Dia.	Hardness	Tensile Strength, psi	Temp. Range, °F		Each
1"-4	2 ft.	1	0.25"	±0.007" per ft.	0.84"	Rockwell C56	122,000	-65° to 300°	00000000	000000
1"-4	3 ft.	1	0.25"	±0.007" per ft.	0.84"	Rockwell C56	122,000	-65° to 300°	00000000	00000
1"-4	4 ft.	1	0.25"	±0.007" per ft.	0.84"	Rockwell C56	122,000	-65° to 300°	00000000	000000
1"-4	5 ft.	1	0.25"	±0.007" per ft.	0.84"	Rockwell C56	122,000	-65° to 300°	00000000	000000
1"-4	6 ft.	1	0.25"	±0.007" per ft.	0.84"	Rockwell C56	122,000	-65° to 300°	00000000	000000
1"-4	7 ft.	1	0.25"	±0.007" per ft.	0.84"	Rockwell C56	122,000	-65° to 300°	00000000	000000
1"-4	8 ft.	1	0.25"	±0.007" per ft.	0.84"	Rockwell C56	122,000	-65° to 300°	00000000	000000

Ball Screws—Left-Hand Threaded

Root diameter indicates the diameter the ball screw will be after machining away the threads.

Alloy Steel
Thread Size	Lg., ft.	No. of Thread Starts	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Root Dia.	Hardness	Tensile Strength, psi	Temp. Range, °F		Each
1"-4	1	1	0.25"	±0.007" per ft.	0.84"	Rockwell C56	122,000	-65° to 300°	00000000	000000
1"-4	2	1	0.25"	±0.007" per ft.	0.84"	Rockwell C56	122,000	-65° to 300°	00000000	000000
1"-4	3	1	0.25"	±0.007" per ft.	0.84"	Rockwell C56	122,000	-65° to 300°	00000000	000000
1"-4	6	1	0.25"	±0.007" per ft.	0.84"	Rockwell C56	122,000	-65° to 300°	00000000	000000

Ball Screws with One Machined End—Right-Hand Threaded

Ball screws with one machined end fit into an end support and are ready to connect to a motor. To adjust the length, the non-machined end can be cut to size.

Root diameter indicates the diameter the ball screw will be after machining away the threads.

							Machined End			Keyway
Thread Size	Root Dia.	Lg., ft.	No. of Thread Starts	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Shoulder Lg.	Overall Lg.	Thread Size	Dia.	Lg.	Wd.	Hardness	Tensile Strength, psi	Temp., °F		Each
Alloy Steel
1"-4	0.84"	2	1	0.25"	±0.007" per ft.	2 23/32"	4 1/32"	0.781"-32	5/8"	1.13"	0.188"	Rockwell C56	122,000	-65° to 300°	00000000	0000000
1"-4	0.84"	4	1	0.25"	±0.007" per ft.	2 23/32"	4 1/32"	0.781"-32	5/8"	1.13"	0.188"	Rockwell C56	122,000	-65° to 300°	00000000	000000
1"-4	0.84"	6	1	0.25"	±0.007" per ft.	2 23/32"	4 1/32"	0.781"-32	5/8"	1.13"	0.188"	Rockwell C56	122,000	-65° to 300°	00000000	00000000

Externally-Threaded Ball Nuts—Right-Hand Threaded

Black-Oxide Alloy Steel
	Thread Size	Lg.	Wd.	Ht.	No. of Thread Starts	Travel Distance per Turn	External Thread Size	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash	Temp. Range, °F		Each
B	1"-4	2 11/32"	1 1/2"	1 1/2"	1	0.25"	1 9/16"-18	Rockwell C56	1,625	0.015"	-65° to 300°	00000000	0000000

Externally-Threaded Ball Nuts—Left-Hand Threaded

Black-Oxide Alloy Steel
	Thread Size	Lg.	Wd.	Ht.	No. of Thread Starts	Travel Distance per Turn	External Thread Size	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash	Temp. Range, °F		Each
A	1"-4	2 11/32"	1 1/2"	1 1/2"	1	0.25"	1 9/16"-18	Rockwell C56	1,620	0.015"	-65° to 300°	00000000	0000000

Flange Ball Nuts—Left-Hand Threaded

					Flange
	Thread Size	Lg.	Wd.	Ht.	Dia.	Thick.	No. of Thread Starts	Travel Distance per Turn	Bolt Circle Dia.	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash	Temp. Range, °F		Each
Black-Oxide Alloy Steel
E	1"-4	2 3/8"	1 1/2"	1 1/2"	3 15/64"	5/8"	1	0.25"	2 3/4"	Rockwell C56	1,620	0.015"	-65° to 300°	00000000	0000000
E	1"-4	2 5/8"	1 1/2"	1 1/2"	2 15/64"	5/8"	1	0.25"	2 3/4"	Rockwell C56	1,620	0.015"	-65° to 300°	00000000	000000

Fast-Travel Ball Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than ball screws with a single thread start. Internal ball bearings provide smooth low-friction travel in applications that require high speeds, accurate positioning, and repeatable movement. To ensure compatibility, select components that have the same thread size and number of thread starts. Ball nuts are furnished with a tube to keep ball bearings in place. Do not remove the tube until you are ready to install the nuts onto the screws.

Black-oxide alloy steel ball nuts have mild corrosion resistance.

Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.

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

Ball Screws—Right-Hand Threaded

Root diameter indicates the diameter the ball screw will be after machining away the threads.

Alloy Steel
Thread Size	Lg.	No. of Thread Starts	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Root Dia.	Hardness	Tensile Strength, psi	Temperature Range, °F		Each
1"-4	2ft.	2	0.5"	±0.007" per ft.	0.87"	Rockwell C56	126,500	-65° to 300°	00000000	0000000
1"-4	2ft.	4	1"	±0.007" per ft.	0.84"	Rockwell C56	123,000	-65° to 300°	00000000	000000
1"-4	3ft.	2	0.5"	±0.007" per ft.	0.87"	Rockwell C56	126,500	-65° to 300°	00000000	000000
1"-4	3ft.	4	1"	±0.007" per ft.	0.84"	Rockwell C56	123,000	-65° to 300°	00000000	000000
1"-4	4ft.	2	0.5"	±0.007" per ft.	0.87"	Rockwell C56	126,500	-65° to 300°	00000000	000000
1"-4	4ft.	4	1"	±0.007" per ft.	0.84"	Rockwell C56	123,000	-65° to 300°	00000000	000000
1"-4	5ft.	2	0.5"	±0.007" per ft.	0.87"	Rockwell C56	126,500	-65° to 300°	00000000	000000
1"-4	5ft.	4	1"	±0.007" per ft.	0.84"	Rockwell C56	123,000	-65° to 300°	00000000	000000
1"-4	6ft.	2	0.5"	±0.007" per ft.	0.87"	Rockwell C56	126,500	-65° to 300°	00000000	000000
1"-4	6ft.	4	1"	±0.007" per ft.	0.84"	Rockwell C56	123,000	-65° to 300°	00000000	000000
1"-4	7ft.	2	0.5"	±0.007" per ft.	0.87"	Rockwell C56	126,500	-65° to 300°	00000000	000000
1"-4	7ft.	4	1"	±0.007" per ft.	0.84"	Rockwell C56	123,000	-65° to 300°	00000000	000000
1"-4	8ft.	2	0.5"	±0.007" per ft.	0.87"	Rockwell C56	126,500	-65° to 300°	00000000	000000
1"-4	8ft.	4	1"	±0.007" per ft.	0.84"	Rockwell C56	123,000	-65° to 300°	00000000	000000

Externally Threaded Ball Nuts—Right-Hand Threaded

Black-Oxide Alloy Steel
	Thread Size	Lg.	Wd.	Ht.	Dia.	No. of Thread Starts	Travel Distance per Turn	External Thread Size	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash	Temperature Range, °F		Each
C	1"-4	3 1/8"	__	__	1 11/16"	2	0.5"	1 9/16"-18	Rockwell C56	4,250	0.015"	-65° to 300°	00000000	0000000
D	1"-4	3"	1 1/2"	1 1/2"	__	4	1"	1 9/16"-18	Rockwell C56	2,300	0.015"	-65° to 300°	00000000	000000

Flange Ball Nuts—Right-Hand Threaded

						Flange
	Thread Size	Lg.	Wd.	Ht.	Dia.	Dia.	Thick.	No. of Thread Starts	Travel Distance per Turn	Bolt Circle Dia.	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash	Temperature Range, °F		Each
Black-Oxide Alloy Steel
F	1"-4	3 1/8"	__	__	1 11/16"	2 15/64"	5/8"	2	0.5"	2 3/4"	Rockwell C56	4,250	0.015"	-65° to 300°	00000000	0000000
G	1"-4	3 1/32"	1 1/2"	1 1/2"	__	2 15/64"	5/8"	4	1"	2 3/4"	Rockwell C56	2,300	0.015"	-65° to 300°	00000000	000000

Self-Stopping Ball Screws and Nuts

Stop Pin Shown Installed

Keep your ball screw spinning without the ball nut damaging your system—a clutch-like collar inside the ball nut prevents it from travelling past the stop pins. Install the included stop pins anywhere along the length of the ball screw by drilling a hole in the valley of the threads (also known as the root) and pressing in the stop pin. When the collar meets the stop pin, the ball nut disengages from the threads and begins to idle. To start the ball nut travelling again, spin the ball screw in the opposite direction. All components are black-oxide steel and have mild corrosion resistance. To ensure compatibility, select components that have the same thread size. Ball nuts are furnished with a tube to keep ball bearings in place. Do not remove the tube until you are ready to install the nuts onto the screws.

Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.

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

Ball Screws—Right-Hand Threaded

Root diameter indicates the diameter the ball screw will be after machining away the threads.

Black-Oxide Alloy Steel
Thread Size	Lg., ft.	No. of Thread Starts	Travel Distance per Turn	Root Dia.	Hardness	Tensile Strength, psi	Temperature Range, °F	No. of Pins Included		Each
1"-4	2	2	0.274"	0.84"	Rockwell C56	95,000	-65° to 300°	2	0000000	0000000
1"-4	3	2	0.274"	0.84"	Rockwell C56	95,000	-65° to 300°	2	0000000	000000
1"-4	4	2	0.274"	0.84"	Rockwell C56	95,000	-65° to 300°	2	0000000	000000

Externally Threaded Ball Nuts—Right-Hand Threaded

Black-Oxide Alloy Steel
Thread Size	Lg.	Dia.	No. of Thread Starts	Travel Distance per Turn	External Thread Size	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash	Temperature Range, °F		Each
1"-4	2 23/32"	1 5/8"	2	0.274"	1.563"-18	Rockwell C56	900	0.008"	-65° to 300°	0000000	0000000

Flange Ball Nuts—Right-Hand Threaded

			Flange
Thread Size	Lg.	Dia.	Dia.	Thick.	No. of Thread Starts	Travel Distance per Turn	Bolt Circle Dia.	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash	Temperature Range, °F		Each
Black-Oxide Alloy Steel
1"-4	2 23/32"	1 5/8"	3 15/64"	5/8"	2	0.274"	2 3/4"	Rockwell C56	900	0.008"	-65° to 300°	0000000	0000000