Higher Load Ratings

Extended body provides more simultaneous ball contacts, raising dynamic and static load ratings significantly versus equivalent UU bore size.

Moment Load Resistance

Longer contact length improves stiffness against pitching and yawing moments from offset loads and cantilevered tooling plates.

Dual Lip Seals

NBR seals on both end faces retain NLGI-2 grease and exclude contamination. Rated −20°C to +80°C continuous service.

GCr15 Chrome Steel

AISI 52100, HRC 58–64. Ball tracks Ra 0.2 µm. Larger internal volume holds a greater grease charge than UU variant.

ISO Housing Compatible

OD and housing-bore dimensions identical to LM...UU — same housing tooling accepts both standard and extended body lengths.

13 Bore Sizes

6 mm to 60 mm covering all standard shaft diameters where extended-body guidance is required.

GCr15 Chrome Steel

AISI 52100 equivalent. Through-hardened HRC 58–64. Ball tracks precision-ground to Ra 0.2 µm for full-film lubrication at rated load.

PA66-GF30 Retainer

Glass-fibre-reinforced nylon cage. Maintains 360° ball spacing. Resistant to mineral oils, greases, and dilute acids across the service temperature range.

NBR Dual Lip Seals

Contact seals on both end faces. Retain grease and exclude dust, swarf, and splash. Operating range −20°C to +80°C with standard NLGI-2 grease.

CNC Machining Centres

Precision positioning of spindle carriages and tool-change assemblies in vertical and horizontal machining centres demands low-friction guidance that maintains dimensional accuracy across millions of cycles.

Packaging & Labelling Lines

High-speed case packers and label applicators cycle continuously at up to 600 strokes per minute, placing a premium on fatigue life and minimal maintenance intervals.

Packaging & Labelling Lines

High-cycle pick-and-place heads and label applicators use LM series bearings for smooth, repeatable shaft travel at up to 600 strokes per minute with minimal maintenance intervals.

Medical Device Stages

Syringe pump drives and diagnostic cartridge dispensers rely on consistent linear force transfer and contamination resistance to meet IEC 60601 reliability requirements.

🔎 Lubrication at Assembly

Apply a thin film of lithium-complex NLGI-2 grease to the shaft before insertion. This provides initial lubrication to the ball tracks during the first few strokes before the internal grease charge distributes fully.

🔧 Alignment Check

After installation, traverse the shaft manually through the full stroke. Resistance should be uniform. A stiff patch indicates shaft misalignment exceeding 0.03 mm/100 mm — correct the housing position before powering the drive.

📈 Retention Method

Use snap rings, end caps, or adhesive retention (Loctite 638) depending on housing design. Ensure the bearing cannot shift axially under dynamic loading; axial play causes fretting at the ball-race contact.

⚙ Re-lubrication Interval

Under typical duty (moderate load, ambient temperature, no contamination), re-lubricate every 500 km of travel or 6 months, whichever occurs first. Harsh environments or high temperatures shorten this interval significantly.

①

Confirm Configuration

Select LUU when the standard UU load rating produces insufficient L10 life, or when moment loads are identified in the load analysis.

②

Select Bore & Verify Housing

Match bore to shaft nominal diameter. Verify housing counterbore depth accommodates the longer LUU body length L.

③

Calculate Load & Life

Calculate L10 = (C/P)³ × 50 km using LUU ratings. Target at least 2× safety margin over the maintenance interval.

④

Contact Us

MOQ 100 units per model. Contact our team with engineering drawings confirming shaft diameter, housing bore, load case, stroke, and target life.

📞 Ready to Order?

MOQ is 100 units per model. Provide engineering drawings specifying shaft diameter and tolerance, housing bore, load case, stroke, operating speed, and target service life. All catalogue data is for reference only — verify critical dimensions against current revision drawings before finalising design.