Press-Fit Outer Sleeve

The outer sleeve is pressed directly into a cylindrical housing bore — no snap rings, end caps, or retaining features required. Reduces assembly time and housing complexity.

Compact Body

Shorter body length than standard LM...UU for the same bore, enabling use in space-constrained housings where the full LM body cannot fit.

Model Number Encoding

KH-XXYY where XX = bore diameter and YY = outer diameter in mm. KH-2030 = 20 mm bore, 30 mm OD. Makes specification straightforward.

Factory Sealed

Pre-greased and sealed at manufacture. No field lubrication required at installation. Replace when grease is exhausted.

Chrome Steel Construction

GCr15 chrome steel (AISI 52100), hardened to HRC 58–64. Suitable for light to moderate industrial duty.

11 Bore Sizes

Available from 6 mm to 50 mm bore, covering a wide range of standard shaft diameters in compact automation equipment.

3D Printers & Additive Manufacturing

The most common application for KH bearings. The compact body and press-fit installation are ideal for FDM printer carriage rails where space is tight and assembly must be rapid.

Small Linear Actuators

Used in pneumatic and electric linear actuators where the available housing length restricts use of standard LM bearings. The press-fit outer sleeve simplifies actuator body design.

Medical Syringe Pumps

KH bearings provide consistent, low-friction linear travel for syringe plunger drives in infusion pumps and diagnostic dispensers where compact size and low particulate generation are critical.

Consumer Electronics

Optical disc drive sled mechanisms, printer paper feed guides, and small scanning stages use KH bearings for compact, quiet linear positioning.

🔧 Press-Fit Installation

Press the KH outer sleeve into the housing bore using a press tool contacting the sleeve end face only. Do not strike the bearing. Housing bore tolerance H7. Verify bore diameter with a plug gauge before pressing.

🔎 Shaft Requirement

Shaft ground to h6/h7 tolerance, HRC 58+ hardness, Ra 0.4 µm surface finish. Insert the shaft gently by hand — excessive force indicates bore damage or misalignment.

📈 No Field Lubrication

KH bearings are factory-sealed and pre-greased. Do not add lubricant at installation. No lubrication port is provided — attempting to inject grease will overpressure the seal.

⚙ Replacement Interval

Replace when detectable radial play develops or when noise increases, indicating grease exhaustion. Under moderate duty in clean environments, typical service is 500–1000 km before replacement.

①

Identify Application Type

Confirm the housing depth can accommodate the KH body length B for the selected bore size.

②

Select Bore & Model

Match bore to shaft nominal diameter. Read the model number as KH-[bore][OD], e.g. KH-1228 for 12 mm bore.

③

Verify Load & Life

Verify L10 = (C/P)³ × 50 km. If load ratings are insufficient, upgrade to LM...UU series with equivalent bore.

④

Contact Us

MOQ 100 units. Contact our team with engineering drawings specifying bore, housing, load case, stroke, and target life.

📞 Ready to Order?

MOQ is 100 units per model. Provide engineering drawings with bore, housing bore tolerance, load case, stroke, speed, and target service life. All catalogue data is for reference only.