Linear ball bearing slides bought on bore size alone fail early under high duty cycles, dust and heat. This solution matches the bearing family to the duty - double-circuit LMK for life, sealed LMUU for contamination, SC plain bushes for 200 C heat - with computed L10 life before you order.
Rated L10 life: 28,840 operating hours
L10 = (C/P)³ × 10⁶ — C = 2,350 N, P = 500 N
Confirm with an engineerLinear ball bearing slides fail in three predictable ways when they are bought on bore size alone. Run a single-circuit bearing at high duty cycles and the shafts score, sliding gets gritty, and replacement becomes a scheduled line-down event. Run an open bearing in sawdust or stone dust and the ball circuit gums up long before its catalog life. And run any ball bearing near 150-200 degrees C and the grease carbonizes within weeks, whatever the spec sheet promised at room temperature.
Match the bearing family to the duty instead of defaulting to one catalog page. LMK double-length bearings add a second ball recirculation circuit, extending rated travel life by roughly 60% for high-cycle slides. LMUU sealed extended-length bearings combine double-lip seals with a labyrinth groove and 40% more balls for dusty, shock-loaded travel. SC plain bushes replace the ball circuit with PTFE-impregnated bronze where heat or contamination kills grease. KH pillow-block housings make retrofit installation a bolt-on job with self-aligning tolerance up to 3 degrees.
Who / what: a packaging OEM runs LMK16UU double-length bearings on product pusher slides cycling 40 strokes per minute. Problem: single-circuit open bearings scored their hardened shafts within a season under continuous duty.
Where the numbers come from: the OEM's planned-maintenance records across three production years.
Source: OEM maintenance planner records referenced at the annual supply review.
Who / what: a cabinet-shop retrofit required bearings that survive sawdust without air purging. Problem: open LM bearings gummed up with resin-bound dust.
Where the numbers come from: shop maintenance log kept by the retrofit contractor, plus the bearing's published ingress-reduction test basis.
Source: contractor's maintenance log reviewed at reorder; LMUU sealed-design specification.
Who / what: a foundry needed slides near a 180°C zone where grease-carbonized ball bearings failed fast. Problem: ball circuits lost grease within weeks.
Where the numbers come from: foundry maintenance swap-out tickets before and after the change.
Source: customer maintenance ticket history supplied during technical consultation.
★★★★★
Packaging OEM maintenance buyer ordering through a European distributor.
"The L10 worksheet we ran together held up: 18 months per service cycle, exactly as the calculation said."
Source type: distributor-supplied reorder history plus OEM maintenance planner notes.
★★★☆☆
Workshop retrofit order placed directly with the factory via email.
"Sealed bearings solved our dust problem, though I would have liked the LMUU list in metric shaft sizes on the website."
Source type: buyer email follow-up after the retrofit season.
★★★★★
Foundry engineering team sourcing heat-resistant slides through a Korean trading partner.
"Plain bushes near the oven zone outlasted anything with grease in it. Swap tickets went from monthly to seasonal."
Source type: trading partner's technical feedback report from the end user.
Request the material certificate set with your quotation for food, medical or export-regulated applications; we attach it as standard.
Chrome steel linear ball bearing bush covering shaft diameters 6–60 mm, available in open and closed types. Recirculating ball retainer design delivers smooth, low-friction linear travel for CNC, automation, and general machinery.
LMF Series square-flange linear ball bearing with 4-bolt square mounting pattern for JIS B 1185 standard housings. GCr15 chrome steel with PA66-GF retainer delivers 1,370 N dynamic load at LMF16UU. Designed for CNC router, 3D printer, and automation frames using square aluminum extrusion housings.
LMK Series double-length square-flange linear ball bearing with two independent ball recirculation circuits, delivering 2,350 N dynamic load at LMK16UU and 60% longer rated travel life. Designed for packaging machinery, textile equipment, and high-duty reciprocating axes where standard single-circuit bearings wear prematurely.
LMUU Series sealed extended-length linear bearing with double-lip rubber seals and labyrinth groove, reducing dust ingress by 95% versus open-type bearings. Extended sleeve increases ball count by 40%, delivering 1,580 N dynamic load at LM16UU. Designed for woodworking CNC, stone cutting, and recycling machinery in contaminated environments.
European metric flanged linear bearing with open-type clearance slot, designed for bolt-on mounting into standard LME housings. Covers shaft diameters 8–60 mm, chrome steel construction, drop-in replacement for SKF LMEF, INA KGNOZ, and equivalent European series.
KH Series pillow block linear bearing housing unit with pre-installed LM bearing in cast aluminum housing. Bolt-on installation eliminates press-fit tooling; tool-free bearing replacement takes 5 minutes. Self-aligning ±3° compensates shaft misalignment. Covers shaft diameters 8–50 mm for packaging, conveyor, and medical equipment.
SC Series plain (sleeve) linear bearing with PTFE-impregnated bronze bushing replacing the ball circuit — contamination-tolerant, shock-resistant, and rated to 200°C. Covers shaft diameters 6–60 mm, ideal for foundry, woodworking, packaging, and high-temperature industrial equipment where ball bearings fail.
Ball-type linear bearings follow L10 = (C/P)^3 x 1 million revolutions, where C is the basic dynamic load rating and P the equivalent load. Halving the load roughly triples travel life, which is why the calculator above starts from your real payload.
Choose LMK double-length bearings when the slide runs at high duty cycles: two ball circuits spread load over a longer contact zone, giving about 60% longer rated travel life than a standard single-length bearing at the same bore.
In sawdust, stone dust or recycling environments, yes. Double-lip seals plus a labyrinth groove block most particulate from reaching the circuit, and the extended sleeve adds ball count for higher capacity.
Switch families: SC plain bushes use a PTFE-impregnated bronze sleeve without a ball circuit, rated to 200 degrees C and tolerant of shock and contamination.
Yes. KH units ship with the LM bearing pre-installed in a self-aligning cast housing (up to 3 degrees compensation), so retrofitting needs no press tooling and bearing swaps take minutes.
Send your axis requirements — travel, load, speed and environment — and our engineers reply with a matched specification and quotation.
