Ball Screw Lead Screws | McMaster-Carr

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System of Measurement

Thread Size

Component

Ball Screw with One Machined End

Length

Travel Distance per Turn

Root Diameter

Diameter

Nut Type

Threading

Thread Direction

Material

17-4 PH Stainless Steel

Steel

Thread Type

Ball

Metric Ball

Number of Thread Starts

Dynamic Thrust Load Capacity

Flange Width

Flange Material

Maximum Backlash

Tensile Strength

20,000 psi to 39,999 psi

40,000 psi to 99,999 psi

100,000 psi or greater

Number of Mounting Holes

Hardness

Rockwell C38

Rockwell C56

Rockwell C58

Rockwell C58 to Rockwell C62

Thread Fabrication

Minimum Temperature

RoHS

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

REACH

131 Products

Ball 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.

Ball Screws with Flange Ball Nut—Right-Hand Threaded

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

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

		Ball Screw			Flange Ball Nut, mm
	Thread Size	Lg., mm	Root Dia., mm	Tensile Strength, psi	Lg.	Dia.	Lg. Tolerance Type	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Dynamic Thrust Load Cap., lb.	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/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/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/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/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/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/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/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/300 mm	Rockwell C58	560	0.05	5 to 175	0000000	000000

Ball Screws—Right-Hand Threaded

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

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

	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
Carbon Steel



		M14	500 mm	1	4 mm	±0.210 mm/300 mm	11.5 mm	Rockwell C58	21,000	5 to 175	0000000	000000


		M14	1,000 mm	1	4 mm	±0.210 mm/300 mm	11.5 mm	Rockwell C58	21,000	5 to 175	0000000	000000
		M16	500 mm	1	5 mm	±0.210 mm/300 mm	13.5 mm	Rockwell C58	21,000	5 to 175	0000000	000000
		M16	1,000 mm	1	5 mm	±0.210 mm/300 mm	13.5 mm	Rockwell C58	21,000	5 to 175	000000	000000
		M20	500 mm	1	5 mm	±0.210 mm/300 mm	17.2 mm	Rockwell C58	21,000	5 to 175	0000000	000000
		M20	1,000 mm	1	5 mm	±0.210 mm/300 mm	17.2 mm	Rockwell C58	21,000	5 to 175	000000	000000
		M20	1,500 mm	1	10 mm	±0.210 mm/300 mm	16.4 mm	Rockwell C58	21,000	5 to 175	000000	000000
		M25	500 mm	1	5 mm	±0.210 mm/300 mm	22.2 mm	Rockwell C58	21,000	5 to 175	0000000	000000
		M25	1,000 mm	1	5 mm	±0.210 mm/300 mm	22.2 mm	Rockwell C58	21,000	5 to 175	0000000	000000
		M25	1,500 mm	1	10 mm	±0.210 mm/300 mm	20.2 mm	Rockwell C58	21,000	5 to 175	0000000	000000


		Alloy Steel



				3/8"-8	1 ft.	1	0.125"	±0.007"/1 ft.	0.3"	Rockwell C56	85,000	-65 to 300	00000000	00000


				3/8"-8	2 ft.	1	0.125"	±0.007"/1"	0.3"	Rockwell C56	85,000	-65 to 300	00000000	000000
				5/8"-5	1 ft.	1	0.2"	±0.004"/1 ft.	0.5"	Rockwell C56	72,500	-65 to 300	00000000	00000
				5/8"-5	2 ft.	1	0.2"	±0.004"/1 ft.	0.5"	Rockwell C56	72,500	-65 to 300	00000000	00000
				5/8"-5	3 ft.	1	0.2"	±0.004"/1 ft.	0.5"	Rockwell C56	72,500	-65 to 300	00000000	000000
				5/8"-5	4 ft.	1	0.2"	±0.004"/1 ft.	0.5"	Rockwell C56	72,500	-65 to 300	00000000	000000
				5/8"-5	5 ft.	1	0.2"	±0.004"/1 ft.	0.5"	Rockwell C56	72,500	-65 to 300	00000000	000000
				5/8"-5	6 ft.	1	0.2"	±0.004"/1 ft.	0.5"	Rockwell C56	72,500	-65 to 300	00000000	000000
				3/4"-5	1 ft.	1	0.2"	±0.007"/1 ft.	0.65"	Rockwell C56	92,500	-65 to 300	00000000	00000
				3/4"-5	2 ft.	1	0.2"	±0.007"/1 ft.	0.65"	Rockwell C56	92,500	-65 to 300	00000000	00000
				3/4"-5	3 ft.	1	0.2"	±0.007"/1 ft.	0.65"	Rockwell C56	92,500	-65 to 300	00000000	00000


				3/4"-5	4 ft.	1	0.2"	±0.007"/1 ft.	0.65"	Rockwell C56	92,500	-65 to 300	00000000	000000
				3/4"-5	5 ft.	1	0.2"	±0.007"/1 ft.	0.65"	Rockwell C56	92,500	-65 to 300	00000000	000000
				3/4"-5	6 ft.	1	0.2"	±0.007"/1 ft.	0.65"	Rockwell C56	92,500	-65 to 300	00000000	000000
				1"-4	2 ft.	1	0.25"	±0.007"/1 ft.	0.84"	Rockwell C56	122,000	-65 to 300	00000000	00000
				1"-4	3 ft.	1	0.25"	±0.007"/1 ft.	0.84"	Rockwell C56	122,000	-65 to 300	00000000	00000
				1"-4	4 ft.	1	0.25"	±0.007"/1 ft.	0.84"	Rockwell C56	122,000	-65 to 300	00000000	000000
				1"-4	5 ft.	1	0.25"	±0.007"/1 ft.	0.84"	Rockwell C56	122,000	-65 to 300	00000000	000000
				1"-4	6 ft.	1	0.25"	±0.007"/1 ft.	0.84"	Rockwell C56	122,000	-65 to 300	00000000	000000
				1"-4	7 ft.	1	0.25"	±0.007"/1 ft.	0.84"	Rockwell C56	122,000	-65 to 300	00000000	000000
				1"-4	8 ft.	1	0.25"	±0.007"/1 ft.	0.84"	Rockwell C56	122,000	-65 to 300	00000000	000000


				1 1/2"-2	2 ft.	1	0.5"	±0.007"/1 ft.	1.26"	Rockwell C56	183,500	-65 to 300	00000000	000000
				1 1/2"-2	3 ft.	1	0.5"	±0.007"/1 ft.	1.26"	Rockwell C56	183,500	-65 to 300	00000000	000000
				1 1/2"-2	4 ft.	1	0.5"	±0.007"/1 ft.	1.26"	Rockwell C56	183,500	-65 to 300	00000000	000000
				1 1/2"-2	5 ft.	1	0.5"	±0.007"/1 ft.	1.26"	Rockwell C56	183,500	-65 to 300	00000000	000000
				1 1/2"-2	6 ft.	1	0.5"	±0.007"/1 ft.	1.26"	Rockwell C56	183,500	-65 to 300	00000000	000000
				1 1/2"-2	7 ft.	1	0.5"	±0.007"/1 ft.	1.26"	Rockwell C56	183,500	-65 to 300	00000000	000000
				1 1/2"-2	8 ft.	1	0.5"	±0.007"/1 ft.	1.26"	Rockwell C56	183,500	-65 to 300	00000000	000000
				1 1/2"-4	2 ft.	1	0.25"	±0.007"/1 ft.	1.375"	Rockwell C56	200,000	-65 to 300	00000000	000000
				1 1/2"-4	3 ft.	1	0.25"	±0.007"/1 ft.	1.375"	Rockwell C56	200,000	-65 to 300	00000000	000000
				1 1/2"-4	4 ft.	1	0.25"	±0.007"/1 ft.	1.375"	Rockwell C56	200,000	-65 to 300	00000000	000000


				1 1/2"-4	5 ft.	1	0.25"	±0.007"/1 ft.	1.375"	Rockwell C56	200,000	-65 to 300	00000000	000000
				1 1/2"-4	6 ft.	1	0.25"	±0.007"/1 ft.	1.375"	Rockwell C56	200,000	-65 to 300	00000000	000000
				1 1/2"-4	7 ft.	1	0.25"	±0.007"/1 ft.	1.375"	Rockwell C56	200,000	-65 to 300	00000000	000000
				1 1/2"-4	8 ft.	1	0.25"	±0.007"/1 ft.	1.375"	Rockwell C56	200,000	-65 to 300	00000000	000000
2 1/4"-2				2 ft.	1	0.5"	±0.004"/1 ft.	1.85"	Rockwell C58 to Rockwell C62	120,000	-65 to 300	00000000	000000
2 1/4"-2	3 ft.			1	0.5"	±0.004"/1 ft.	1.85"	Rockwell C58 to Rockwell C62	120,000	-65 to 300	00000000	000000
2 1/4"-2	4 ft.			1	0.5"	±0.004"/1 ft.	1.85"	Rockwell C58 to Rockwell C62	120,000	-65 to 300	00000000	00000000
2 1/4"-2	5 ft.			1	0.5"	±0.004"/1 ft.	1.85"	Rockwell C58 to Rockwell C62	120,000	-65 to 300	00000000	00000000
2 1/4"-2	6 ft.			1	0.5"	±0.004"/1 ft.	1.85"	Rockwell C58 to Rockwell C62	120,000	-65 to 300	00000000	00000000
2 1/4"-2	7 ft.			1	0.5"	±0.004"/1 ft.	1.85"	Rockwell C58 to Rockwell C62	120,000	-65 to 300	00000000	00000000


2 1/4"-2	8 ft.			1	0.5"	±0.004"/1 ft.	1.85"	Rockwell C58 to Rockwell C62	120,000	-65 to 300	00000000	00000000

Ball Screws—Left-Hand Threaded

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

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

	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
Alloy Steel



	5/8"-5	1	1	0.2"	±0.007"/1 ft.	0.5"	Rockwell C56	72,500	-65 to 300	00000000	000000


	5/8"-5	2	1	0.2"	±0.007"/1 ft.	0.5"	Rockwell C56	72,500	-65 to 300	00000000	00000
	5/8"-5	3	1	0.2"	±0.007"/1 ft.	0.5"	Rockwell C56	72,500	-65 to 300	00000000	000000
	5/8"-5	6	1	0.2"	±0.007"/1 ft.	0.5"	Rockwell C56	72,500	-65 to 300	00000000	000000
	1"-4	1	1	0.25"	±0.007"/1 ft.	0.84"	Rockwell C56	122,000	-65 to 300	00000000	00000
	1"-4	2	1	0.25"	±0.007"/1 ft.	0.84"	Rockwell C56	122,000	-65 to 300	00000000	000000
	1"-4	3	1	0.25"	±0.007"/1 ft.	0.84"	Rockwell C56	122,000	-65 to 300	00000000	000000
	1"-4	6	1	0.25"	±0.007"/1 ft.	0.84"	Rockwell C56	122,000	-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.

Ball Screws—Right-Hand Threaded

Carbon Steel—Carbon steel ball screws and nuts are case hardened, so they resist wear better than standard carbon steel. However, they are less corrosion resistant than black-oxide alloy steel screws and nuts.

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

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

	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
Carbon Steel



	M12	500 mm	2	10 mm	±0.05 mm/300 mm	9.6 mm	Rockwell C56	95,000	32 to 150	00000000	0000000


	M12	1,000 mm	2	10 mm	±0.05 mm/300 mm	9.6 mm	Rockwell C56	95,000	32 to 150	00000000	000000
	M15	500 mm	4	16 mm	±0.05 mm/300 mm	12.9 mm	Rockwell C56	95,000	32 to 150	00000000	00000
	M15	500 mm	4	20 mm	±0.05 mm/300 mm	12.3 mm	Rockwell C56	95,000	32 to 150	00000000	000000
	M15	1,000 mm	4	16 mm	±0.05 mm/300 mm	12.9 mm	Rockwell C56	95,000	32 to 150	00000000	000000
	M15	1,000 mm	4	20 mm	±0.05 mm/300 mm	12.3 mm	Rockwell C56	95,000	32 to 150	00000000	000000
	M16	500 mm	4	16 mm	±0.05 mm/300 mm	13.3 mm	Rockwell C56	95,000	32 to 150	00000000	00000
	M16	1,000 mm	4	16 mm	±0.05 mm/300 mm	13.3 mm	Rockwell C56	95,000	32 to 150	00000000	000000
	M20	500 mm	4	20 mm	±0.05 mm/300 mm	17 mm	Rockwell C56	95,000	32 to 150	00000000	000000
	M20	1,000 mm	4	20 mm	±0.05 mm/300 mm	17 mm	Rockwell C56	95,000	32 to 150	00000000	000000
	M32	500 mm	2	20 mm	±0.05 mm/300 mm	28.5 mm	Rockwell C56	95,000	32 to 150	00000000	000000


	M32	500 mm	4	32 mm	±0.05 mm/300 mm	28.3 mm	Rockwell C56	95,000	32 to 150	00000000	000000
	M32	1,000 mm	2	20 mm	±0.05 mm/300 mm	28.5 mm	Rockwell C56	95,000	32 to 150	00000000	000000
	M32	1,000 mm	4	32 mm	±0.05 mm/300 mm	28.3 mm	Rockwell C56	95,000	32 to 150	00000000	000000
	M40	500 mm	4	40 mm	±0.05 mm/300 mm	35.4 mm	Rockwell C56	95,000	32 to 150	00000000	000000
	M40	1,000 mm	4	40 mm	±0.05 mm/300 mm	35.4 mm	Rockwell C56	95,000	32 to 150	00000000	000000


	Alloy Steel



			1/2"-4	1 ft.	2	0.5"	±0.007"/1 ft.	0.4"	Rockwell C56	58,000	-65 to 300	00000000	00000


			1/2"-4	2 ft.	2	0.5"	±0.007"/1 ft.	0.4"	Rockwell C56	58,000	-65 to 300	00000000	00000
			3/4"-4	1 ft.	2	0.5"	±0.007"/1 ft.	0.63"	Rockwell C56	92,500	-65 to 300	00000000	00000
			3/4"-4	2 ft.	2	0.5"	±0.007"/1 ft.	0.63"	Rockwell C56	92,500	-65 to 300	00000000	00000
			3/4"-4	3 ft.	2	0.5"	±0.007"/1 ft.	0.63"	Rockwell C56	92,500	-65 to 300	00000000	000000
			3/4"-4	4 ft.	2	0.5"	±0.007"/1 ft.	0.63"	Rockwell C56	92,500	-65 to 300	00000000	000000
			3/4"-4	5 ft.	2	0.5"	±0.007"/1 ft.	0.63"	Rockwell C56	92,500	-65 to 300	00000000	000000
			3/4"-4	6 ft.	2	0.5"	±0.007"/1 ft.	0.63"	Rockwell C56	92,500	-65 to 300	00000000	000000
			1"-4	2 ft.	2	0.5"	±0.007"/1 ft.	0.87"	Rockwell C56	126,500	-65 to 300	00000000	000000
			1"-4	2 ft.	4	1"	±0.007"/1 ft.	0.84"	Rockwell C56	123,000	-65 to 300	00000000	000000
			1"-4	3 ft.	2	0.5"	±0.007"/1 ft.	0.87"	Rockwell C56	126,500	-65 to 300	00000000	000000


			1"-4	3 ft.	4	1"	±0.007"/1 ft.	0.84"	Rockwell C56	123,000	-65 to 300	00000000	000000
			1"-4	4 ft.	2	0.5"	±0.007"/1 ft.	0.87"	Rockwell C56	126,500	-65 to 300	00000000	000000
			1"-4	4 ft.	4	1"	±0.007"/1 ft.	0.84"	Rockwell C56	123,000	-65 to 300	00000000	000000
			1"-4	5 ft.	2	0.5"	±0.007"/1 ft.	0.87"	Rockwell C56	126,500	-65 to 300	00000000	000000
			1"-4	5 ft.	4	1"	±0.007"/1 ft.	0.84"	Rockwell C56	123,000	-65 to 300	00000000	000000
			1"-4	6 ft.	2	0.5"	±0.007"/1 ft.	0.87"	Rockwell C56	126,500	-65 to 300	00000000	000000
			1"-4	6 ft.	4	1"	±0.007"/1 ft.	0.84"	Rockwell C56	123,000	-65 to 300	00000000	000000
			1"-4	7 ft.	2	0.5"	±0.007"/1 ft.	0.87"	Rockwell C56	126,500	-65 to 300	00000000	000000
			1"-4	7 ft.	4	1"	±0.007"/1 ft.	0.84"	Rockwell C56	123,000	-65 to 300	00000000	000000
			1"-4	8 ft.	2	0.5"	±0.007"/1 ft.	0.87"	Rockwell C56	126,500	-65 to 300	00000000	000000


			1"-4	8 ft.	4	1"	±0.007"/1 ft.	0.84"	Rockwell C56	123,000	-65 to 300	00000000	000000
			1 1/2"-2	2 ft.	2	1"	±0.007"/1 ft.	1.14"	Rockwell C56	166,000	-65 to 300	00000000	000000
			1 1/2"-2	3 ft.	2	1"	±0.007"/1 ft.	1.14"	Rockwell C56	166,000	-65 to 300	00000000	000000
			1 1/2"-2	4 ft.	2	1"	±0.007"/1 ft.	1.14"	Rockwell C56	166,000	-65 to 300	00000000	000000
			1 1/2"-2	5 ft.	2	1"	±0.007"/1 ft.	1.14"	Rockwell C56	166,000	-65 to 300	00000000	000000
			1 1/2"-2	6 ft.	2	1"	±0.007"/1 ft.	1.14"	Rockwell C56	166,000	-65 to 300	00000000	000000
			1 1/2"-2	7 ft.	2	1"	±0.007"/1 ft.	1.14"	Rockwell C56	166,000	-65 to 300	00000000	000000
			1 1/2"-2	8 ft.	2	1"	±0.007"/1 ft.	1.14"	Rockwell C56	166,000	-65 to 300	00000000	000000

Corrosion-Resistant Ball Screws and Nuts

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. 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 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.

Ball Screws—Right-Hand Threaded

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

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

	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
17-4 PH Stainless Steel



	3/8"-8	1	1	0.125"	±0.005"/1 ft.	0.3"	Rockwell C38	150,000	-65 to 300	0000000	0000000


	3/8"-8	2	1	0.125"	±0.004"/1 ft.	0.3"	Rockwell C38	145,000	-65 to 300	000000	000000
	3/8"-8	4	1	0.125"	±0.004"/1 ft.	0.3"	Rockwell C38	145,000	-65 to 300	000000	000000
	5/8"-5	2	1	0.2"	±0.004"/1 ft.	0.5"	Rockwell C38	145,000	-65 to 300	000000	000000
	5/8"-5	4	1	0.2"	±0.004"/1 ft.	0.5"	Rockwell C38	145,000	-65 to 300	000000	000000
	5/8"-5	6	1	0.2"	±0.004"/1 ft.	0.5"	Rockwell C38	145,000	-65 to 300	000000	000000

Fast-Travel Corrosion-Resistant Ball 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.

Ball Screws—Right-Hand Threaded

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

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

	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
17-4 PH Stainless Steel



	1/2"-4	1	2	0.5"	±0.005"/1 ft.	0.4"	Rockwell C38	150,000	-65 to 300	0000000	0000000


	1/2"-4	2	2	0.5"	±0.004"/1 ft.	0.4"	Rockwell C38	145,000	-65 to 300	000000	000000
	1/2"-4	4	2	0.5"	±0.004"/1 ft.	0.4"	Rockwell C38	145,000	-65 to 300	000000	000000
	1/2"-4	6	2	0.5"	±0.004"/1 ft.	0.4"	Rockwell C38	145,000	-65 to 300	000000	000000
	3/4"-4	3	2	0.5"	±0.005"/1 ft.	0.63"	Rockwell C38	150,000	-65 to 300	0000000	000000
	3/4"-4	6	2	0.5"	±0.005"/1 ft.	0.63"	Rockwell C38	150,000	-65 to 300	0000000	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.

Ball Screws—Right-Hand Threaded

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

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

	Lg., ft.	No. of Thread Starts	Travel Distance per Turn	Root Dia.	Hardness	Tensile Strength, psi	Temp. Range, ° F	No. of Pins Included		Each
Black-Oxide Alloy Steel



	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