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	System of Measurement System of Measurement

	Thread Size Thread Size

1/2"-4

3/4"-4

	Thread Type Thread Type

Ball

	Component Component

	Ball Nut
	Ball Screw

	Material Material

Stainless Steel

	Length Length

	Travel Distance per Turn Travel Distance per Turn

0.5"

	Number of Thread Starts Number of Thread Starts

	Nut Type Nut Type


Flange	Externally Threaded

	Maximum Temperature Maximum Temperature

300° F

	Thread Direction Thread Direction

	Right Hand

	Hardness Hardness

Rockwell C38

	Diameter Diameter

1 1/16"

1 5/16"

	Threading Threading

	Fully Threaded

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

DFARS Specialty Metals
COTS-Exempt

	Minimum Temperature Minimum Temperature

-65° F

	Maximum Backlash Maximum Backlash

0.007"

	Dynamic Thrust Load Capacity Dynamic Thrust Load Capacity

Less than 1,000 lbs.

	Root Diameter Root Diameter

0.4"

0.63"

	Thread Fabrication Thread Fabrication

Rolled

	Tensile Strength Tensile Strength

100,000 psi or greater

	Bolt Circle Diameter Bolt Circle Diameter

2 3/32"

	Flange Diameter Flange Diameter

10 Products

Selecting Compatible Lead Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than ball screws with a single thread start. Suitable for use in harsh environments, these ball screws and nuts are made of stainless steel. 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. 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.

17-4 PH Stainless 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	Temperature Range, °F		Each
1/2"-4	1	2	0.5"	±0.005" per ft.	0.4"	Rockwell C38	150,000	-65° to 300°	0000000	000000
1/2"-4	2	2	0.5"	±0.004" per ft.	0.4"	Rockwell C38	145,000	-65° to 300°	000000	000000
1/2"-4	4	2	0.5"	±0.004" per ft.	0.4"	Rockwell C38	145,000	-65° to 300°	000000	000000
1/2"-4	6	2	0.5"	±0.004" per ft.	0.4"	Rockwell C38	145,000	-65° to 300°	000000	000000
3/4"-4	3	2	0.5"	±0.005" per ft.	0.63"	Rockwell C38	150,000	-65° to 300°	0000000	000000
3/4"-4	6	2	0.5"	±0.005" per ft.	0.63"	Rockwell C38	150,000	-65° to 300°	0000000	000000

Externally Threaded Ball Nut—Right-Hand Threaded

17-4 PH Stainless 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
1/2"-4	1 3/4"	1 1/16"	2	0.5"	15/16"-16	Rockwell C38	140	0.007"	-65° to 300°	0000000	0000000
3/4"-4	2 15/16"	1 5/16"	2	0.5"	1 1/4"-16	Rockwell C38	600	0.007"	-65° to 300°	0000000	000000

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
17-4 PH Stainless Steel
1/2"-4	1 29/32"	1 1/16"	2 19/32"	17/32"	2	0.5"	2 3/32"	Rockwell C38	140	0.007"	-65° to 300°	0000000	0000000
3/4"-4	2 15/16"	1 5/16"	2 19/32"	17/32"	2	0.5"	2 3/32"	Rockwell C38	600	0.007"	-65° to 300°	0000000	000000

10 Products

Selecting Compatible Lead Screws and Nuts

Fast-Travel Corrosion-Resistant Ball Screws and Nuts