THE BEARINGINDEX DIRECTORY

LM12S — 12 × 21 × 25 mm

BOUNDARY DIMENSIONSUNIT / mm

Boundary dimensions · schematic, not a product photograph or manufacturing drawing.

Linear bearings

LM12S

LM12S is a linear bearings designation documented on BearingIndex from 1 manufacturer publication. The published boundary dimensions are 12 × 21 × 25 mm. The publishing works are in Zhejiang province, China. Every value below comes from that manufacturer’s own published material, with the date it was recorded.

Bore d: 12 mm
Outside D: 21 mm
Length L: 25 mm

Compare the 1 publication

What each manufacturer published.

Manufacturer	Reference mass (kg)	Source recorded
Hengli Linear LM12S	0.0286	2026-09-24	Request

A dash means that manufacturer did not publish the value. Dimensions every source agrees on are shown above rather than repeated per row.

Calculated from the published values.

Figure	How it is obtained	Result
Radial section height	(D − d) / 2	4.5 mm
Mean diameter d_m	(D + d) / 2	16.5 mm

Arithmetic on the figures above — not a bearing life calculation for your load case.

The works that publish LM12S.

Hengli Linear

Ningbo, Zhejiang, China

Linear-motion ball bearings

Ningbo Hengli Auto Parts and Bearing manufactures linear-motion ball bearings and related linear-motion products. Its site describes design, manufacturing and development operations, with applications in CNC equipment, industrial machinery, medical equipment, 3D printing and food-processing systems. Shaft diameter, bearing length, mounting and travel requirements provide the basis for selection.

Published ranges: Linear-motion ball bearings · Related linear-motion bearing products

15 designations documented here · 1 reviewed evidence record · source recorded 2026-09-24

Ask Hengli Linear about LM12S

Applications the publishing works state.

Application	Stated by
3D printers	Hengli Linear
CNC machinery	Hengli Linear
Food-processing equipment	Hengli Linear
Medical equipment	Hengli Linear

Application areas each manufacturer states for its own range. Confirm load, speed, temperature and lubrication for your case.

Not documented by any source here.

Precision class · Internal clearance · Sealing · Material · Cage material · Z class · V class · Dynamic load rating · Static load rating · Limiting speed · Lubrication · Operating temperature · Precision standard · Ring material · Rolling element material · Limiting speed — grease · Limiting speed — oil · Noise / vibration test method · Manufacturer series · Manufacturer suffix · Ball count · Ball diameter.

Ask the manufacturer for these when you enquire.

Neighbouring designations documented here.

Designation	Envelope d × D × B (mm)	Bearing family	Works
LM12	—	Linear bearings	1
LM12L	—	Linear bearings	1
LM12LUU	—	Linear bearings	2
LM12M	—	Linear bearings	1
LM12UU	—	Linear bearings	1
LM12UU-AJ	—	Linear bearings	1
LM12UU-OP	—	Linear bearings	1

Each envelope shown is that designation’s own published size.

Request a quote for LM12S.

Tick the works you want above, then send one enquiry — each manufacturer answers you separately and cannot see the others.

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Figures on this page are each manufacturer’s own published material, recorded on the dates shown. How we check sources →

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