Alloy Steel Ball Screw Nuts

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Component

Ball Nut

Ball Screw

Ball Screw with One Machined End

Nut

Roller Screw

System of Measurement

Thread Size

Nut Type

Length

Travel Distance per Turn

Diameter

Thread Direction

Dynamic Thrust Load Capacity

Less than 1,000 lb.

1,000 lb. to 1,999 lb.

2,000 lb. to 9,999 lb.

10,000 lb. to 19,999 lb.

20,000 lb. or greater

Number of Thread Starts

Threading

Root Diameter

Material

17-4 PH Stainless Steel

Thread Type

Number of Mounting Holes

Maximum Backlash

Center Height

Tensile Strength

External Thread Size

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

RoHS

REACH

Flange Thickness

Hardness

Rockwell C58 to Rockwell C62

Flange Material

164 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 with Flange Ball Nut—Right-Hand Threaded

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

	Ball Screw			Flange Ball Nut
Thread Size	Lg., mm	Root Dia., mm	Tensile Strength, psi	Lg., mm	Dia., mm	Length Tolerance	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Dynamic Thrust Load Capacity, lbs.	Max. Backlash, mm	Temp. Range, °F		Each
Carbon Steel Ball Screw with Alloy Steel Flange Ball Nut
M6	150	5.3	21,000	21	13	Plus	1	1	±0.210 mm per 300 mm	Rockwell C58	150	0.05	5° to 175°	0000000	0000000
M6	250	5.3	21,000	21	13	Plus	1	1	±0.210 mm per 300 mm	Rockwell C58	150	0.05	5° to 175°	000000	000000
M8	150	6.6	21,000	28	20	Plus	1	2	±0.210 mm per 300 mm	Rockwell C58	470	0.05	5° to 175°	0000000	000000
M8	250	6.6	21,000	28	20	Plus	1	2	±0.210 mm per 300 mm	Rockwell C58	470	0.05	5° to 175°	000000	000000
M10	200	8.6	21,000	28	23	Plus	1	2	±0.210 mm per 300 mm	Rockwell C58	510	0.05	5° to 175°	0000000	000000
M10	300	8.6	21,000	28	23	Plus	1	2	±0.210 mm per 300 mm	Rockwell C58	510	0.05	5° to 175°	000000	000000
M12	200	10.6	21,000	30	25	Plus	1	2	±0.210 mm per 300 mm	Rockwell C58	560	0.05	5° to 175°	000000	000000
M12	300	10.6	21,000	30	25	Plus	1	2	±0.210 mm per 300 mm	Rockwell C58	560	0.05	5° to 175°	0000000	000000

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
3/8"-8	1 ft.	1	0.125"	±0.004" per ft.	0.31"	Rockwell C56	85,000	-40° to 300°	00000000	000000
3/8"-8	2 ft.	1	0.125"	±0.004" per ft.	0.31"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1/2"-5	1 ft.	1	0.2"	±0.004" per ft.	0.405"	Rockwell C56	85,000	-40° to 300°	00000000	00000
1/2"-5	2 ft.	1	0.2"	±0.004" per ft.	0.405"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1/2"-5	3 ft.	1	0.2"	±0.004" per ft.	0.405"	Rockwell C56	85,000	-40° to 300°	00000000	000000
5/8"-5	1 ft.	1	0.2"	±0.004" per ft.	0.503"	Rockwell C56	85,000	-40° to 300°	00000000	00000
5/8"-5	2 ft.	1	0.2"	±0.004" per ft.	0.503"	Rockwell C56	85,000	-40° to 300°	00000000	00000
5/8"-5	3 ft.	1	0.2"	±0.004" per ft.	0.503"	Rockwell C56	85,000	-40° to 300°	00000000	000000
5/8"-5	4 ft.	1	0.2"	±0.004" per ft.	0.503"	Rockwell C56	85,000	-40° to 300°	00000000	000000
5/8"-5	5 ft.	1	0.2"	±0.004" per ft.	0.503"	Rockwell C56	85,000	-40° to 300°	00000000	000000
5/8"-5	6 ft.	1	0.2"	±0.004" per ft.	0.503"	Rockwell C56	85,000	-40° to 300°	00000000	000000
3/4"-5	1 ft.	1	0.2"	±0.004" per ft.	0.655"	Rockwell C56	85,000	-40° to 300°	00000000	00000
3/4"-5	2 ft.	1	0.2"	±0.004" per ft.	0.655"	Rockwell C56	85,000	-40° to 300°	00000000	000000
3/4"-5	3 ft.	1	0.2"	±0.004" per ft.	0.655"	Rockwell C56	85,000	-40° to 300°	00000000	000000
3/4"-5	4 ft.	1	0.2"	±0.004" per ft.	0.655"	Rockwell C56	85,000	-40° to 300°	00000000	000000
3/4"-5	5 ft.	1	0.2"	±0.004" per ft.	0.655"	Rockwell C56	85,000	-40° to 300°	00000000	000000
3/4"-5	6 ft.	1	0.2"	±0.004" per ft.	0.655"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	2 ft.	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	3 ft.	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	4 ft.	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	5 ft.	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	6 ft.	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	7 ft.	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	8 ft.	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-2	2 ft.	1	0.5"	±0.004" per ft.	1.265"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-2	3 ft.	1	0.5"	±0.004" per ft.	1.265"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-2	4 ft.	1	0.5"	±0.004" per ft.	1.265"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-2	5 ft.	1	0.5"	±0.004" per ft.	1.265"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-2	6 ft.	1	0.5"	±0.004" per ft.	1.265"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-2	7 ft.	1	0.5"	±0.004" per ft.	1.265"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-2	8 ft.	1	0.5"	±0.004" per ft.	1.265"	Rockwell C56	85,000	-40° to 300°	00000000	00000000
1 1/2"-4	2 ft.	1	0.25"	±0.004" per ft.	1.379"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-4	3 ft.	1	0.25"	±0.004" per ft.	1.379"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-4	4 ft.	1	0.25"	±0.004" per ft.	1.379"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-4	5 ft.	1	0.25"	±0.004" per ft.	1.379"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-4	6 ft.	1	0.25"	±0.004" per ft.	1.379"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-4	7 ft.	1	0.25"	±0.004" per ft.	1.379"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-4	8 ft.	1	0.25"	±0.004" per ft.	1.379"	Rockwell C56	85,000	-40° to 300°	00000000	00000000
Black-Oxide Alloy Steel
2 1/4"-2	2 ft.	1	0.5"	±0.004" per ft.	1.85"	Rockwell C58-62	120,000	-65° to 300°	00000000	000000
2 1/4"-2	3 ft.	1	0.5"	±0.004" per ft.	1.85"	Rockwell C58-62	120,000	-65° to 300°	00000000	000000
2 1/4"-2	4 ft.	1	0.5"	±0.004" per ft.	1.85"	Rockwell C58-62	120,000	-65° to 300°	00000000	00000000
2 1/4"-2	5 ft.	1	0.5"	±0.004" per ft.	1.85"	Rockwell C58-62	120,000	-65° to 300°	00000000	00000000
2 1/4"-2	6 ft.	1	0.5"	±0.004" per ft.	1.85"	Rockwell C58-62	120,000	-65° to 300°	00000000	00000000
2 1/4"-2	7 ft.	1	0.5"	±0.004" per ft.	1.85"	Rockwell C58-62	120,000	-65° to 300°	00000000	00000000
2 1/4"-2	8 ft.	1	0.5"	±0.004" per ft.	1.85"	Rockwell C58-62	120,000	-65° to 300°	00000000	00000000

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
5/8"-5	1	1	0.2"	±0.004" per ft.	0.503"	Rockwell C56	85,000	-40° to 300°	00000000	000000
5/8"-5	2	1	0.2"	±0.004" per ft.	0.503"	Rockwell C56	85,000	-40° to 300°	00000000	00000
5/8"-5	3	1	0.2"	±0.004" per ft.	0.503"	Rockwell C56	85,000	-40° to 300°	00000000	000000
5/8"-5	6	1	0.2"	±0.004" per ft.	0.503"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	1	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	2	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	3	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	6	1	0.25"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° 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
5/8"-5	0.5"	2	1	0.2"	±0.004" per ft.	1 63/64"	3 19/64"	0.469"-32	13/32"	1 1/4"	1/8"	Rockwell C56	85,000	-40° to 300°	00000000	0000000
5/8"-5	0.5"	4	1	0.2"	±0.004" per ft.	1 63/64"	3 19/64"	0.469"-32	13/32"	1 1/4"	1/8"	Rockwell C56	85,000	-40° to 300°	00000000	000000
5/8"-5	0.5"	6	1	0.2"	±0.004" per ft.	1 63/64"	3 19/64"	0.469"-32	13/32"	1 1/4"	1/8"	Rockwell C56	85,000	-40° to 300°	00000000	000000
3/4"-5	0.655"	2	1	0.2"	±0.004" per ft.	2 3/16"	3 3/16"	0.586"-32	1/2"	7/8"	1/8"	Rockwell C56	85,000	-40° to 300°	00000000	000000
3/4"-5	0.655"	4	1	0.2"	±0.004" per ft.	2 3/16"	3 3/16"	0.586"-32	1/2"	7/8"	1/8"	Rockwell C56	85,000	-40° to 300°	00000000	000000
3/4"-5	0.66"	6	1	0.2"	±0.004" per ft.	2 3/16"	3 3/16"	0.586"-32	1/2"	7/8"	1/8"	Rockwell C56	85,000	-40° to 300°	0000000	000000
1"-4	0.84"	2	1	0.25"	±0.004" per ft.	2 23/32"	4 1/32"	0.781"-32	5/8"	1 1/4"	3/16"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	0.84"	4	1	0.25"	±0.004" per ft.	2 23/32"	4 1/32"	0.781"-32	5/8"	1 1/4"	3/16"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	0.84"	6	1	0.25"	±0.004" per ft.	2 23/32"	4 1/32"	0.781"-32	5/8"	1 1/4"	3/16"	Rockwell C56	85,000	-40° to 300°	00000000	000000

Externally-Threaded Ball Nuts—Right-Hand Threaded

Secure a way wiper on the end of a ball nut to sweep chips and other contaminants out of the way as it moves across the ball screw.

Ball Nuts															Way Wipers
	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	Temp. Range, °F		Each		Each
Black-Oxide Alloy Steel
A	3/8"-8	1 11/64"	__	__	3/4"	1	0.125"	11/16"-28	Rockwell C56	150	0.015"	-40° to 300°	00000000	000000	000000	00
A	1/2"-5	2 3/4"	__	__	1 1/16"	1	0.2"	15/16"-16	Rockwell C56	1,200	0.015"	-40° to 300°	00000000	000000	0000000	000000
A	3/4"-5	2 57/64"	__	__	1 5/16"	1	0.2"	1.173"-18	Rockwell C56	1,900	0.015"	-40° to 300°	00000000	000000	0000000	00000
A	1 1/2"-2	5 19/32"	__	__	2 5/8"	1	0.5"	2.360"-18	Rockwell C56	14,500	0.015"	-40° to 300°	00000000	000000	000000	00
A	1 1/2"-4	3 1/4"	__	__	2 3/32"	1	0.25"	1 31/32"-18	Rockwell C56	4,000	0.015"	-40° to 300°	00000000	000000	000000	00
A	2 1/4"-2	6 11/16"	__	__	3 3/8"	1	0.5"	3.137"-12	Rockwell C58-62	21,306	0.015"	-65° to 300°	00000000	00000000	000000	00
B	5/8"-5	1 23/32"	1"	1"	__	1	0.2"	15/16"-16	Rockwell C56	770	0.015"	-40° to 300°	00000000	00000	000000	00
B	1"-4	2 11/32"	1 1/2"	1 1/2"	__	1	0.25"	1 9/16"-18	Rockwell C56	1,600	0.015"	-40° to 300°	00000000	000000	000000	00

Externally-Threaded Ball Nuts—Left-Hand Threaded

Secure a way wiper on the end of a ball nut to sweep chips and other contaminants out of the way as it moves across the ball screw.

Ball Nuts														Way Wipers
	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		Each
Black-Oxide Alloy Steel
A	1"-4	2 11/32"	__	__	1	0.25"	1.563"-18	Rockwell C56	1,600	0.015"	-40° to 300°	00000000	0000000	0000000	000000
B	5/8"-5	1 45/64"	1"	1"	1	0.2"	15/16"-16	Rockwell C56	770	0.015"	-40° to 300°	00000000	00000	0000000	00000

Platform Ball Nuts—Right-Hand Threaded

Alloy Steel
Thread Size	Lg., mm	Wd., mm	Ht., mm	Center Ht., mm	No. of Thread Starts	Travel Distance per Turn, mm	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash, mm	Temp. Range, °F		Each
M14	35	34	30	13	1	4	Rockwell C58	1,200	0.1	5° to 175°	0000000	0000000
M16	36	42	32.5	16	1	5	Rockwell C58	1,200	0.1	5° to 175°	0000000	000000
M20	35	48	39	17	1	5	Rockwell C58	1,300	0.1	5° to 175°	0000000	000000
M20	58	48	46	18	1	10	Rockwell C58	2,350	0.1	5° to 175°	0000000	000000
M25	35	60	45	20	1	5	Rockwell C58	1,500	0.1	5° to 175°	0000000	000000
M25	94	60	55	23	1	10	Rockwell C58	7,000	0.1	5° to 175°	0000000	000000

Flange Ball Nuts—Right-Hand Threaded

						Flange
	Thread Size	Lg.	Wd.	Ht.	Dia.	Dia.	Wd.	Ht.	Thick.	No. of Thread Starts	Travel Distance per Turn	Bolt Circle Dia.	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash		Each
Alloy Steel
C	M14	40mm	__	__	31mm	__	50mm	37mm	10mm	1	4mm	__	Rockwell C58	1,200	0.1mm	0000000	0000000
C	M16	40mm	__	__	34mm	__	54mm	40mm	10mm	1	5mm	__	Rockwell C58	1,200	0.1mm	0000000	000000
C	M20	40mm	__	__	40mm	__	60mm	46mm	10mm	1	5mm	__	Rockwell C58	1,300	0.1mm	0000000	000000
C	M20	64mm	__	__	52mm	__	82mm	64mm	12mm	1	10mm	__	Rockwell C58	2,350	0.1mm	0000000	000000
C	M25	40mm	__	__	43mm	__	67mm	50mm	10mm	1	5mm	__	Rockwell C58	1,500	0.1mm	0000000	000000
C	M25	98mm	__	__	60mm	__	96mm	72mm	15mm	1	10mm	__	Rockwell C58	7,000	0.1mm	0000000	000000
Black-Oxide Alloy Steel
D	3/8"-8	1"	__	__	3/4"	1 39/64"	__	__	11/32"	1	0.125"	1 15/64"	Rockwell C56	130	0.015"	00000000	000000
D	1/2"-5	2 57/64"	__	__	1 1/16"	2 19/32"	__	__	17/32"	1	0.2"	2 3/32"	Rockwell C56	1,200	0.015"	00000000	000000
D	3/4"-5	2 57/64"	__	__	1 5/16"	2 39/64"	__	__	17/32"	1	0.2"	2 3/32"	Rockwell C56	1,900	0.015"	00000000	000000
D	1 1/2"-2	5 19/32"	__	__	2 5/8"	4 21/32"	__	__	25/32"	1	0.5"	3 7/8"	Rockwell C56	14,500	0.015"	00000000	000000
D	1 1/2"-4	3 9/32"	__	__	2 3/32"	4 3/8"	__	__	13/16"	1	0.25"	3 1/2"	Rockwell C56	4,000	0.015"	00000000	000000
D	2 1/4"-2	6 23/32"	__	__	3 3/8"	5 3/8"	__	__	1 37/64"	1	0.5"	4 3/8"	Rockwell C58-62	21,306	0.015"	0000000	00000000
E	5/8"-5	1 23/32"	1"	1"	__	2 39/64"	__	__	17/32"	1	0.2"	2 3/32"	Rockwell C56	770	0.015"	00000000	000000
E	1"-4	2 11/32"	1 1/2"	1 1/2"	__	3 1/4"	__	__	5/8"	1	0.25"	2 3/4"	Rockwell C56	1,600	0.015"	00000000	000000

Flange Ball Nuts—Left-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	Temp. Range, °F		Each
Black-Oxide Alloy Steel
E	5/8"-5	1 45/64"	1"	1"	__	2 19/32"	17/32"	1	0.2"	2 3/32"	Rockwell C56	770	0.015"	-40° to 300°	00000000	0000000
E	1"-4	2 11/32"	1 1/2"	1 1/2"	1"	3 1/4"	5/8"	1	0.25"	2 3/4"	Rockwell C56	1,600	0.015"	-40° 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
1/2"-4	1ft.	2	0.5"	±0.004" per ft.	0.405"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1/2"-4	2ft.	2	0.5"	±0.004" per ft.	0.405"	Rockwell C56	85,000	-40° to 300°	00000000	000000
3/4"-4	1ft.	2	0.5"	±0.004" per ft.	0.629"	Rockwell C56	85,000	-40° to 300°	00000000	00000
3/4"-4	2ft.	2	0.5"	±0.004" per ft.	0.629"	Rockwell C56	85,000	-40° to 300°	00000000	000000
3/4"-4	3ft.	2	0.5"	±0.004" per ft.	0.629"	Rockwell C56	85,000	-40° to 300°	00000000	000000
3/4"-4	4ft.	2	0.5"	±0.004" per ft.	0.629"	Rockwell C56	85,000	-40° to 300°	00000000	000000
3/4"-4	5ft.	2	0.5"	±0.004" per ft.	0.629"	Rockwell C56	85,000	-40° to 300°	00000000	000000
3/4"-4	6ft.	2	0.5"	±0.004" per ft.	0.629"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	2ft.	2	0.5"	±0.004" per ft.	0.879"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	2ft.	4	1"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	3ft.	2	0.5"	±0.004" per ft.	0.879"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	3ft.	4	1"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	4ft.	2	0.5"	±0.004" per ft.	0.879"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	4ft.	4	1"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	5ft.	2	0.5"	±0.004" per ft.	0.879"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	5ft.	4	1"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	6ft.	2	0.5"	±0.004" per ft.	0.879"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	6ft.	4	1"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	7ft.	2	0.5"	±0.004" per ft.	0.879"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	7ft.	4	1"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	8ft.	2	0.5"	±0.004" per ft.	0.879"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1"-4	8ft.	4	1"	±0.004" per ft.	0.836"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-2	2ft.	2	1"	±0.004" per ft.	1.143"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-2	3ft.	2	1"	±0.004" per ft.	1.143"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-2	4ft.	2	1"	±0.004" per ft.	1.143"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-2	5ft.	2	1"	±0.004" per ft.	1.143"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-2	6ft.	2	1"	±0.004" per ft.	1.143"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-2	7ft.	2	1"	±0.004" per ft.	1.143"	Rockwell C56	85,000	-40° to 300°	00000000	000000
1 1/2"-2	8ft.	2	1"	±0.004" per ft.	1.143"	Rockwell C56	85,000	-40° to 300°	00000000	00000000

Externally Threaded Ball Nuts—Right-Hand Threaded

Secure a way wiper on the end of a ball nut to sweep chips and other contaminants out of the way as it moves across the ball screw.

Ball Nuts															Way Wipers
	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		Each
Black-Oxide Alloy Steel
C	1/2"-4	1 3/4"	__	__	1"	2	0.5"	15/16"-16	Rockwell C56	1,050	0.015"	-40° to 300°	00000000	0000000	000000	00
C	3/4"-4	2 15/16"	__	__	1 5/16"	2	0.5"	1 1/4"-18	Rockwell C56	3,400	0.015"	-40° to 300°	00000000	000000	000000	00
C	1"-4	3 1/8"	__	__	1 11/16"	2	0.5"	1 9/16"-18	Rockwell C56	3,900	0.015"	-40° to 300°	00000000	000000	000000	00
C	1 1/2"-2	3 5/8"	__	__	2 5/8"	2	1"	2 1/4"-20	Rockwell C56	8,200	0.015"	-40° to 300°	00000000	000000	0000000	0000000
D	1"-4	3"	1 1/2"	1 1/2"	__	4	1"	1 9/16"-18	Rockwell C56	2,350	0.015"	-40° to 300°	00000000	000000	000000	00

Flange Ball Nuts—Right-Hand Threaded

Secure a way wiper on the end of a ball nut to sweep chips and other contaminants out of the way as it moves across the ball screw.

Ball Nuts
						Flange											Way Wipers
	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		Each
Black-Oxide Alloy Steel
F	1/2"-4	1 3/4"	__	__	1"	2 19/32"	17/32"	2	0.5"	2 3/32"	Rockwell C56	1,050	0.015"	-40° to 300°	00000000	0000000	000000	00
F	3/4"-4	2 15/16"	__	__	1 5/16"	2 5/8"	17/32"	2	0.5"	2 3/32"	Rockwell C56	3,400	0.015"	-40° to 300°	00000000	000000	000000	00
F	1"-4	3 1/8"	__	__	1 11/16"	3 1/4"	5/8"	2	0.5"	2 3/4"	Rockwell C56	3,900	0.015"	-40° to 300°	00000000	000000	000000	00
F	1 1/2"-2	3 5/8"	__	__	2 5/8"	4 15/16"	1 1/64"	2	1"	4 1/8"	Rockwell C56	8,200	0.015"	-40° to 300°	00000000	000000	0000000	0000000
G	1"-4	3"	1 1/2"	1 1/2"	__	3 1/4"	5/8"	4	1"	2 3/4"	Rockwell C56	2,350	0.015"	-40° to 300°	00000000	000000	000000	00

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
5/8"-6	1	2	0.188"	0.562"	Rockwell C56	95,000	-65° to 300°	2	0000000	0000000
5/8"-6	2	2	0.188"	0.562"	Rockwell C56	95,000	-65° to 300°	2	0000000	000000
5/8"-6	3	2	0.188"	0.562"	Rockwell C56	95,000	-65° to 300°	2	0000000	000000
1"-4	2	2	0.274"	0.84"	Rockwell C56	95,000	-65° to 300°	2	0000000	000000
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
5/8"-6	1 7/8"	1"	2	0.188"	15/16"-16	Rockwell C56	300	0.006"	-65° to 300°	0000000	0000000
1"-4	2 23/32"	1 5/8"	2	0.274"	1.563"-18	Rockwell C56	900	0.008"	-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
Black-Oxide Alloy Steel
5/8"-6	1 7/8"	1"	2"	13/32"	2	0.188"	1 5/8"	Rockwell C56	300	0.006"	-65° to 300°	0000000	0000000
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	000000

Roller Screws and Nuts

Precision ground to create more points of contact, these roller screws and nuts are highly accurate and handle much higher loads than ball screws and nuts of the same size. They're most traditionally used to replace hydraulics in linear actuators but can also be used in place of ball and lead screw assemblies because of their high load capacity and precise motion control. In fact, they're almost four times more accurate than our most accurate ball and lead screws. They also last longer than ball screw nuts in systems with lower loads and can handle higher shock loads. However, because they have more contact points, they’re slightly less efficient than ball screws. To ensure compatibility, select components that have the same thread direction and size.

Roller screws are made of hardened steel for strength and durability.

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

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

Roller Screws—Right-Hand Partially Threaded

Alloy Steel
Thread Size	Lg., mm	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Min. Thread Lg., mm	Root Dia., mm	Hardness	Tensile Strength, psi		Each
M15	642	5	4	±0.023 mm per 300 mm	522	14.59	Rockwell C60	105,000	0000000	000000000
M15	642	5	5	±0.023 mm per 300 mm	522	14.44	Rockwell C60	105,000	0000000	00000000
M20	680	5	4	±0.023 mm per 300 mm	561	19.15	Rockwell C60	105,000	0000000	00000000
M20	680	5	5	±0.023 mm per 300 mm	561	19.05	Rockwell C60	105,000	0000000	00000000

Round Nuts—Right-Hand Threaded

					Keyway
Thread Size	Lg., mm	Dia., mm	No. of Thread Starts	Travel Distance per Turn, mm	Wd., mm	Dp., mm	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash, mm	Temp. Range, °F	Lubrication		Each
Alloy Steel
M15	45	35	5	4	4	14	Rockwell C60	9,230	0.03	-40° to 350°	Required	0000000	000000000
M15	45	35	5	5	4	14	Rockwell C60	12,000	0.03	-40° to 350°	Required	0000000	00000000
M20	65	42	5	4	4	18	Rockwell C60	15,100	0.03	-40° to 350°	Required	0000000	00000000
M20	65	42	5	5	4	18	Rockwell C60	20,600	0.03	-40° to 350°	Required	0000000	00000000