Metric Ball Screws | McMaster-Carr

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	System of Measurement System of Measurement

Metric

	Thread Type Thread Type

Metric Ball

Metric

	Thread Size Thread Size

	Component Component

	Ball Screw
	Ball Nut
	End Support

	Length Length

	Diameter Diameter

	Travel Distance per Turn Travel Distance per Turn

	Nut Type Nut Type


Flange	Platform

	Material Material

Alloy Steel

Carbon Steel

Steel

	Threading Threading

	Fully Threaded

	Root Diameter Root Diameter

	Thread Direction Thread Direction

	Right Hand

	Center Height Center Height

	ID ID

12 mm

15 mm

17 mm

	Number of Thread Starts Number of Thread Starts

	Width Width

	Locknut Thread Size Locknut Thread Size

M12

M15

M17

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	Number of Mounting Holes Number of Mounting Holes

	Dynamic Thrust Load Capacity Dynamic Thrust Load Capacity

	Hardness Hardness

Rockwell C39

Rockwell C58

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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55 Products

Selecting Compatible Lead Screws and Nuts

About Set Screws

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, these 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 and travel distance per turn. 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 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	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash, mm	Temperature Range, °F		Each
Carbon Steel Ball Screw with Alloy Steel Flange Ball Nut
M6	150	5.3	21,000	21	13	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	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	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	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	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	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	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	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.

Carbon Steel
Thread Size	Lg., mm	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Root Dia., mm	Hardness	Tensile Strength, psi	Temperature Range, °F		Each
M14	500	1	4	±0.210 mm per 300 mm	11.5	Rockwell C58	21,000	5° to 175°	0000000	000000
M14	1,000	1	4	±0.210 mm per 300 mm	11.5	Rockwell C58	21,000	5° to 175°	0000000	000000
M16	500	1	5	±0.210 mm per 300 mm	13.5	Rockwell C58	21,000	5° to 175°	0000000	000000
M16	1,000	1	5	±0.210 mm per 300 mm	13.5	Rockwell C58	21,000	5° to 175°	000000	000000
M20	500	1	5	±0.210 mm per 300 mm	17.2	Rockwell C58	21,000	5° to 175°	0000000	000000
M20	1,000	1	5	±0.210 mm per 300 mm	17.2	Rockwell C58	21,000	5° to 175°	000000	000000
M20	1,500	1	10	±0.210 mm per 300 mm	16.4	Rockwell C58	21,000	5° to 175°	000000	000000
M25	500	1	5	±0.210 mm per 300 mm	22.2	Rockwell C58	21,000	5° to 175°	0000000	000000
M25	1,000	1	5	±0.210 mm per 300 mm	22.2	Rockwell C58	21,000	5° to 175°	0000000	000000
M25	1,500	1	10	±0.210 mm per 300 mm	20.2	Rockwell C58	21,000	5° to 175°	0000000	000000

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	Temperature 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

Alloy Steel
Thread Size	Lg., mm	Dia., mm	Wd., mm, mm	Ht., mm	Thick., mm	No. of Thread Starts	Travel Distance per Turn, mm	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash, mm	Temperature Range, °F		Each
M14	40	31	50	37	10	1	4	Rockwell C58	1,200	0.1	5° to 175°	0000000	0000000
M16	40	34	54	40	10	1	5	Rockwell C58	1,200	0.1	5° to 175°	0000000	000000
M20	40	40	60	46	10	1	5	Rockwell C58	1,300	0.1	5° to 175°	0000000	000000
M20	64	52	82	64	12	1	10	Rockwell C58	2,350	0.1	5° to 175°	0000000	000000
M25	40	43	67	50	10	1	5	Rockwell C58	1,500	0.1	5° to 175°	0000000	000000
M25	98	60	96	72	15	1	10	Rockwell C58	7,000	0.1	5° to 175°	0000000	000000

Metric End Supports for Lead Screws and Ball Screws

A set of ball bearings reduces friction and secures the end of a ball or lead screw. End supports handle radial loads (perpendicular to the lead screw) and thrust loads (parallel to the lead screw). Note: The end of your ball or lead screw must be machined before installing it into an end support.

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

					Combined Load Cap., lbs.		Top Mounting Holes
ID, mm	Ht., mm	Center Ht., mm	Wd., mm	Dp., mm	Static	Dynamic	Dia.	Ctr.-to-Ctr. Wd., mm	Temperature Range, °F		Each
For Combined Radial and Thrust Loads
Carbon Steel
12	43	25	60	34	730	1,450	6.6	46	0° to 160°	0000000	0000000
15	48	28	70	38	890	1,700	6.6	54	0° to 160°	0000000	000000
17	64	39	86	51	1,300	3,050	9	68	0° to 160°	0000000	000000

Swiveling Tips for Screws and Threaded Studs

Attach to the end of a screw or threaded stud to apply uniform pressure on uneven and angled surfaces. Also known as toggle and swivel-foot pads.

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

Steel
Dia.	Ht.	Load Capacity, lbs.	Thread Size	Range of Motion		Each
13mm	16.5mm	360	M5	20°	0000000	000000
13mm	16.5mm	520	M6	20°	0000000	00000
16mm	21mm	930	M8	20°	0000000	00000
19mm	23mm	1,455	M10	20°	0000000	00000
22mm	25.5mm	1,870	M12	20°	0000000	00000
25mm	29.5mm	3,130	M16	20°	0000000	00000
32mm	36mm	4,720	M20	20°	0000000	00000

Metric Alloy Steel Low-Profile Swivel-Tip Set Screws

A low-profile flat-faced ball tip allows these set screw to be used in low-clearance applications. They're also known as ball-ended thrust screws. Length listed is the overall length.

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

Alloy Steel
Lg., mm	Tip Dia., mm	Max. Swivel Angle	Drive Size, mm	Hardness		Each
M5 × 0.8 mm
9.5	2.2	9°	2.5	Rockwell C39	000000000	00000
15.5	2.2	9°	2.5	Rockwell C39	000000000	0000
24.5	2.2	9°	2.5	Rockwell C39	000000000	0000
M6 × 1 mm
16	3.2	9°	3	Rockwell C39	000000000	0000
20	3.2	9°	3	Rockwell C39	000000000	0000
25	3.2	9°	3	Rockwell C39	000000000	0000
M8 × 1.25 mm
20	4.5	9°	4	Rockwell C39	000000000	00000
25	4.5	9°	4	Rockwell C39	000000000	00000
30	4.5	9°	4	Rockwell C39	000000000	00000
M10 × 1.5 mm
16	6	9°	5	Rockwell C39	000000000	00000
25	6	9°	5	Rockwell C39	000000000	00000
35	6	9°	5	Rockwell C39	000000000	00000
M12 × 1.75 mm
16	7.2	9°	6	Rockwell C39	000000000	00000
30	7.2	9°	6	Rockwell C39	000000000	00000
40	7.2	9°	6	Rockwell C39	000000000	00000

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Selecting Compatible Lead Screws and Nuts

About Set Screws

Metric Ball Screws and Nuts

Metric End Supports for Lead Screws and Ball Screws

Swiveling Tips for Screws and Threaded Studs

Metric Alloy Steel Low-Profile Swivel-Tip Set Screws