UMR Series stages are available in a wide selection of sizes

UMR Series

Double-Row Steel Linear Ball Bearing Stages

Wide selection of travel ranges and sizes
Low-profile steel construction for high stability and rigidity
Double-row ball bearings for higher load capacity (except UMR12)
Angular deviation better than 100–200 µrad
Threaded micrometer mounting

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Overview
Specifications
Ordering
Drawings
Literature & Downloads
Related Products

UMR Series Precision Double-Row Ball Bearing Linear Stages feature steel construction for high stability and rigidity. The ball bearings and precision-ground bearing surfaces provide exceptional linear travel, with angular deviation better than 100-200 µrad. UMR3, UMR5, and URM8 Series Stages have double-row ball bearings making them an excellent choice for carrying high loads. UMR12 Series Stages contain a single row of ball bearings. In all UMR Stages, the moving carriage is preloaded by two springs to ensure constant micrometer contact for smooth, backlash-free motion.

Four stage sizes, each available in several travel ranges, allow you to closely match both your physical requirements and performance requirements. UMR5, UMR8, and UMR12 have aperture versions available with a clear hole through the carrier and stage body. Apertures are very useful for the positioning of optics, fiber optics, or cabled devices.
Multiple drive options cover the range of precision positioning. Standard BM Series Micrometers provide 1 µm sensitivity, while DM Series Differential Micrometers offer 0.1 µm. For coarse motion with position locking, a fixed positioning kit replaces the micrometer with two opposing adjustment screws and lock nuts. An optional carriage locking kit includes a screw that mounts in the stage body opposite the micrometer. Motorized actuators can be added for precision motion control.

Generous hole patterns allow great flexibility in component placement on the stage mounting surface. Two stages can be easily stacked in an XY configuration and mounted to a table or breadboard (M-PBN Mounting Base required, except UMR8 and UMR12). Multi-axis stage configurations are easily assembled using EQ Series Angle Brackets. UMR Stages are compatible with UTR and URM Rotation Stages, BGM Goniometers, and SL Series Mirror Mounts.

UMR stages are available with clear apertures for demanding applications. M-UMR12.4A , M-UMR5.16A , M-UMR5.25A , M-UMR8.25A , and M-UMR8.51 are shown.

UMR3.5

UMR5.16

UMR5.25

UMR8.25

UMR8.51

UMR12.40

UMR12.63

UMR12.80

Two UMR5.25 stages with a UTR rotation stage.

Two UMR stages with an SL optical mount.

Specifications

Model (Metric)	Travel [in. (mm)]	Angular Deviation (µrad)	Load Capacity [lb (N)]	Actuator Sensitivity		Fixed Positioning Kit	Carriage Lock	Base Plate
Model (Metric)	Travel [in. (mm)]	Angular Deviation (µrad)	Load Capacity [lb (N)]	1 µm	0.1 µm	Fixed Positioning Kit	Carriage Lock	Base Plate
UMR3 Series
UMR3.5	0.20 (5)	<100	135 (600)	BM11.5	DM11-5	FP3-5	CL3-5	M-PBN3
UMR5 Series
M-UMR5.16	0.63 (16)	<200	135 (600)	BM11.5	DM11-5	‡	CL6-5	M-PBN5
M-UMR5.16	0.63 (16)			BM11.16	DM11-16	‡	CL6-16	M-PBN5
UMR5.16A	0.63 (16)			BM11.16	DM11-16	‡	CL6-16	M-PBN5
UMR5.25	1.00 (25.4)			BM11.25	DM11-25	‡	CL6-25	M-PBN5
UMR5.25A	1.00 (25.4)			BM11.25	DM11-25	‡	CL6-25	M-PBN5
UMR8 Series
UMR8.4	0.16 (4)	<200	200 (900)	BM17.04N	DM17-4	‡	CL12-4	M-PBN8
UMR8.25	1.00 (25.4)			BM17.25	DM17-25	‡	CL12-25	M-PBN8
UMR8.25A	1.00 (25.4)			BM17.25	DM17-25	‡	CL12-25	M-PBN8
UMR8.51	2.00 (50.8)			BM17.51		‡	CL12-51	M-PBN8
	2.01 (51)			BM17.51		‡	CL12-51	M-PBN8
UMR12 Series
UMR12.40	1.57 (40)	<200	90 (400)	BM25.40		FP18-40	CL18-40	M-PBN12
UMR12.40A	1.57 (40)			BM25.40		FP18-40	CL18-40	M-PBN12
UMR12.63	2.48 (63)			BM25.63		FP18-63	CL18-63	M-PBN12
UMR12.80	3.15 (80)			BM32.80		FP22-80	CL22-80	M-PBN12

‡ For fixed positioning applications, order 2 each of the listed carriage locks.

Load Characteristics

Model (Metric)	Cz (N)	+Cx (N)	-Cx (BM) (N)	-Cx (DM) (N)	a (mm)	ω (Nm)	Kαx (mrad/Nm)	Kαy (mrad/Nm)	Kαz (mrad/Nm)
UMR3.5	600	10	40	30	20	0.04	0.7	0.3	0.5
UMR5.5	600	12	40	30	22	0.05	0.1	0.2	0.2
UMR5.16	600	15	40	30	22	0.05	0.1	0.2	0.2
UMR5.25	600	11	40	30	22	0.05	0.1	0.2	0.2
UMR8.4	900	18	100	50	40	0.07	0.05	0.05	0.05
UMR8.25	900	17	100	50	40	0.07	0.05	0.05	0.05
UMR8.51	900	11	100		40	0.07	0.05	0.05	0.05
UMR12.40	400	35	450		70	0.08	0.02	0.02	0.02
UMR12.63	400	25	450		70	0.08	0.02	0.02	0.02
UMR12.80	400	20	450		70	0.08	0.02	0.02	0.02

Q	Off-center load, Q≤Cz/(1 + D/a)
Cz	Centered normal load capacity
D	Cantilever distance in mm
a	Bearing constant
-Cx	Axial load capacity in the direction toward the actuator
+Cx	Axial load capacity in the direction away from the actuator
ω	Drive torque for +Cx = 10 N
kαx	Angular stiffness (roll)
kαy	Longitudinal stiffness (pitch)
kαz	Transverse stiffness (yaw)

Model	Description	avail raw	Availability	price raw	Price	Qty. MULTI ADD
ADAPT-BM17-375	Motorized Actuator Adapter, UMR8 to VP-25AA, LTA-HS, CMA, or PZA12	2	2 Weeks	43	$43.99	ADD
ADAPT-BM25-375	Motorized Actuator Adapter, UMR12 to VP-25AA, LTA-HS, CMA, or PZA12	0	In Stock	43	$43.99	ADD
CL12-25	Carriage Lock, UMR8.25, 2 Req. for Fixed Positioning	3	3 Weeks	29	$29.99	ADD
CL12-4	Carriage Lock, UMR8.4, 2 Req. for Fixed Positioning	0	In Stock	29	$29.99	ADD
CL12-51	Carriage Lock, UMR8.51, 2 Req. for Fixed Positioning	3	3 Weeks	29	$29.99	ADD
CL18-40	Carriage Lock, UMR12.40 or UMR12.40A	6	6 Weeks	29	$29.99	ADD
CL18-63	Carriage Lock, UMR12.63	0	In Stock	29	$29.99	ADD
CL22-80	Carriage Lock, UMR12.80	7	7 Weeks	29	$29.99	ADD
CL3-5	Carriage Lock, UMR3.5	7	7 Weeks	36	$36.99	ADD
CL6-16	Carriage Lock, UMR5.16, 2 Req. for Fixed Positioning	0	In Stock	29	$29.99	ADD
CL6-25	Carriage Lock, UMR5.25, 2 Req. for Fixed Positioning	0	In Stock	29	$29.99	ADD
CL6-5	Carriage Lock, UMR5.5, 2 Req. for Fixed Positioning	0	In Stock	29	$29.99	ADD
FP18-40	Fixed Positioning Kit, UMR12.40	7	7 Weeks	26	$26.99	ADD
FP18-63	Fixed Positioning Kit, UMR12.63	7	7 Weeks	26	$26.99	ADD
FP22-80	Fixed Positioning Kit, UMR12.80	7	7 Weeks	26	$26.99	ADD
FP3-5	Fixed Positioning Kit, UMR3.5	0	In Stock	42	$42.99	ADD
M-UMR12.40	Single-Row Ball Bearing Linear Stage, 40mm Travel, 400 N Load Capacity, Metric	4	4 Weeks	515	$515.99	ADD
M-UMR12.40A	Single-Row Ball Bearing Linear Stage, Aperture, 40mm Travel, 400N Load, Metric	0	In Stock	649	$649.99	ADD
M-UMR12.63	Single-Row Ball Bearing Linear Stage, 63mm Travel, 400 N Load Capacity, Metric	5	5 Weeks	695	$695.99	ADD
M-UMR12.80	Single-Row Ball Bearing Linear Stage, 80mm Travel, 400 N Load Capacity, Metric	5	5 Weeks	799	$799.99	ADD
M-UMR3.5	Double-Row Ball Bearing Linear Stage, 5mm Travel, 600 N Load Capacity, Metric	0	In Stock	219	$219.99	ADD
M-UMR5.16	Double-Row Ball Bearing Linear Stage, 16mm Travel, 600N Capacity, Metric	0	In Stock	219	$219.99	ADD
M-UMR5.16A	Double-Row Ball Bearing Linear Stage, Aperture, 16mm, 600N Capacity, Metric	4	4 Weeks	255	$255.99	ADD
M-UMR5.25	Double-Row Ball Bearing Linear Stage, 25mm Travel, 600N Capacity, Metric	0	In Stock	299	$299.99	ADD
M-UMR5.25A	Double-Row Ball Bearing Linear Stage, Aperture, 25mm, 600N Capacity, Metric	4	4 Weeks	315	$315.99	ADD
M-UMR5.5	Double-Row Ball Bearing Linear Stage, 5mm Travel, 600 N Load Capacity, Metric	0	In Stock	299	$299.99	ADD
M-UMR8.25	Double-Row Ball Bearing Linear Stage, 25mm Travel, 900 N Load Capacity, Metric	0	In Stock	289	$289.99	ADD
M-UMR8.25A	Double-Row Ball Bearing Linear Stage, Aperture, 25mm Travel, 900 N Load, Metric	0	In Stock	369	$369.99	ADD
M-UMR8.4	Double-Row Ball Bearing Linear Stage, 4mm Travel, 900 N Load Capacity, Metric	0	In Stock	289	$289.99	ADD
M-UMR8.51	Double-Row Ball Bearing Linear Stage, 51mm Travel, 900 N Load Capacity, Metric	5	5 Weeks	565	$565.99	ADD
M-UMR8.51A	Double-Row Ball Bearing Linear Stage, Aperture, 51mm Travel, 900 N Load, Metric	4	4 Weeks	559	$559.99	ADD
UMR12.40	Single-Row Ball Bearing Linear Stage, 1.57 inch Travel, 90 lb Load Capacity	0	In Stock	515	$515.99	ADD
UMR12.40A	Single-Row Ball Bearing Linear Stage, Aperture, 1.57in Travel, 90 lb Load	5	5 Weeks	649	$649.99	ADD
UMR12.63	Single-Row Ball Bearing Linear Stage, 2.48 inch Travel, 90 lb Load Capacity	4	4 Weeks	695	$695.99	ADD
UMR12.80	Single-Row Ball Bearing Linear Stage, 3.15 inch Travel, 90 lb Load Capacity	0	In Stock	799	$799.99	ADD
UMR3.5	Double-Row Ball Bearing Linear Stage, 0.20 inch Travel, 135 lb Load Capacity	0	In Stock	219	$219.99	ADD
UMR5.16	Double-Row Ball Bearing Linear Stage, 0.63 inch Travel, 135 lb Load Capacity	0	In Stock	219	$219.99	ADD
UMR5.16A	Double-Row Ball Bearing Linear Stage, Aperture, 0.63in Travel, 135 lb Capacity	4	4 Weeks	255	$255.99	ADD
UMR5.25	Double-Row Ball Bearing Linear Stage, 0.98 inch Travel, 135 lb Load Capacity	0	In Stock	299	$299.99	ADD
UMR5.25A	Double-Row Ball Bearing Linear Stage, Aperture, 0.98in Travel, 135 lb Capacity	4	4 Weeks	315	$315.99	ADD
UMR5.5	Double-Row Ball Bearing Linear Stage, 0.20 inch Travel, 135 lb Load Capacity	0	In Stock	299	$299.99	ADD
UMR8.25	Double-Row Ball Bearing Linear Stage, 0.98 inch Travel, 202 lb Load Capacity	0	In Stock	289	$289.99	ADD
UMR8.25A	Double-Row Ball Bearing Linear Stage, Aperture, 0.98 inch Travel, 202 lb Load	0	In Stock	369	$369.99	ADD
UMR8.4	Double-Row Ball Bearing Linear Stage, 0.16 inch Travel, 202 lb Load Capacity	0	In Stock	289	$289.99	ADD
UMR8.51	Double-Row Ball Bearing Linear Stage, 2.01 inch Travel, 202 lb Load Capacity	0	In Stock	565	$565.99	ADD

Model UMR3.5

UMR5 Series

	Thread			Dimensions [ (mm)]
Model (Metric)	A	B	C	D	E	F	G	H
UMR5.5	4-40 (M3)	8-32 (M4)	1/4-20 (M6)	0.500 (12.5)	1.000 (25.0)	2.000 (50.0)	1.77 (45)	2.28 (58)
UMR5.16	4-40 (M3)	8-32 (M4)	1/4-20 (M6)	0.500 (12.5)	1.000 (25.0)	2.000 (50.0)	1.26 (32)	2.28 (58)
UMR5.25	4-40 (M3)	8-32 (M4)	1/4-20 (M6)	0.500 (12.5)	1.000 (25.0)	2.000 (50.0)	1.26 (32)	2.68 (68)

UMR5A Series

	Thread	Dimensions [ (mm)]
Model (Metric)	A	B	C	D	E
UMR5.16A	8-32 (M4)	1.000 (25.0)	2.000 (50.0)	2.283 (58.0)	1.181 (30.0)
UMR5.25A	8-32 (M4)	1.000 (25.0)	2.000 (50.0)	2.677 (68.0)	1.535 (39.0)

Model UMR8.4/8.25

Model UMR8.51

	Thread		Dimensions [ (mm)]
Model (Metric)	A	B	C	D	E
UMR8.4	8-32 (M4)	1/4-20 (M6)	1.000 (25.0)	3.000 (75.0)	2.52 (64)
UMR8.25	8-32 (M4)	1/4-20 (M6)	1.000 (25.0)	3.000 (75.0)	2.09 (53)
UMR8.51	8-32 (M4)	1/4-20 (M6)	1.000 (25.0)	3.000 (75.0)

UMR8A Series

	Thread	Dimensions [ (mm)]
Model (Metric)	A	B	C	D	E	F	G
UMR8.25A	1/4-20 (M6)	1.000 (25.0)	2.000 (50.0)	3.000 (75.0)	4.000 (100.0)	3.622 (92.0)	2.087 (53.0)
M-UMR8.51A	M6	25.0	50.0	75.0	100.0	118..0	79.0

UMR12 Series

	Thread			Dimensions [ (mm)]
Model (Metric)	A	B	C	D	E	F
UMR12.40	10-24 (M5)	1/4-20 (M6)	M18 x 1	1.000 (25.0)	5.61 (142.5)
UMR12.63	10-24 (M5)	1/4-20 (M6)	M18 x 1	1.000 (25.0)	6.56 (166.5)
UMR12.80	10-24 (M5)	1/4-20 (M6)	M22 x 1	1.000 (25.0)	8.29 (210.5)	1.38 (35)