Dongfeng Bearing
KH Series Pillow Block Linear Bearing Housing Unit
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.
Highlights
- Bolt-on installation eliminates precision boring and press-fit tooling — reduces assembly time by 80%
- Tool-free bearing replacement in under 5 minutes via retaining cap — no shaft disassembly needed
- Self-aligning ±3° compensates shaft misalignment between multiple pillow blocks on long assemblies
- Cast aluminum ADC12 housing is 60% lighter than cast iron with anodized corrosion resistance
- Pre-installed LM..UU sealed bearing included — no separate bearing purchase required
- Stainless steel 304 housing variant available for food-grade and wash-down applications
| Housing Series | KH 8–50 (10 sizes) |
|---|---|
| Housing Material | Cast Aluminum ADC12, anodized |
| Mounting Type | Pillow block, 2-bolt base |
| Installed Bearing | LM..UU sealed (pre-installed) |
| Bearing Material | Chrome Steel GCr15 (52100) |
| Shaft Diameter | 8 mm – 50 mm |
| Dynamic Load (KH16) | 980 N |
| Base Bolt Size | M5 / M6 / M8 (size-dependent) |
| Self-Aligning | ±3° |
| Standard Reference | JIS B 1185 KH pillow block |
User Pain Point + Solution + Data
Machine builders designing multi-shaft linear systems face a recurring assembly problem: press-fitting individual LM bearings into housings requires precision boring tools, tight H7 tolerance holes, and significant assembly time. When a bearing wears out, replacement means disassembling the entire shaft assembly. The KH Series pillow block housing unit solves this by integrating an LM bearing into a pre-aligned cast aluminum housing with two bolt-mounting holes. The builder simply bolts the unit to a flat surface — no boring, no press-fit tooling. Bearing replacement takes 5 minutes by unscrewing the retaining cap. The housing accepts shaft diameters from 8 mm to 50 mm and is dimensionally compatible with standard JIS LM bearings for drop-in replacement.
Complete Specifications
| Parameter | Value |
|---|---|
| Housing Series | KH 8 / 10 / 12 / 16 / 20 / 25 / 30 / 35 / 40 / 50 |
| Housing Material | Cast aluminum alloy (ADC12), anodized surface |
| Mounting Type | Pillow block, 2-bolt base |
| Installed Bearing | LM..UU sealed linear bearing (pre-installed) |
| Bearing Material | Chrome Steel GCr15 (52100 equiv.) |
| Shaft Diameter Range | 8 mm – 50 mm |
| Dynamic Load (KH16) | 980 N (LM16UU installed) |
| Base Bolt Size | M5 (KH8–KH20), M6 (KH25–KH40), M8 (KH50) |
| Operating Temperature | -20°C to +80°C (NBR seal equipped) |
| Self-Aligning Angle | ±3° (housing bore tolerance) |
| Standard Reference | JIS B 1185 KH pillow block |
Product Advantages
Bolt-On Installation
No precision boring or press-fit tooling required. The pre-installed LM bearing is aligned within the cast housing at the factory. Simply bolt the pillow block to any flat surface — reduces assembly time by 80% versus press-fit housings.
5-Min InstallTool-Free Bearing Replacement
The retaining cap unscrews by hand or with a simple wrench. Worn bearings are replaced in under 5 minutes without removing the shaft or disassembling adjacent components — a critical advantage for production line maintenance.
5-Min SwapSelf-Aligning ±3°
The housing bore has a slight clearance fit that allows the bearing to tilt up to ±3°, compensating for shaft misalignment between multiple pillow blocks. This prevents edge-loading and premature wear on long multi-support shaft assemblies.
±3° Self-AlignCast Aluminum Housing
ADC12 aluminum alloy housing is 60% lighter than cast iron equivalents, with an anodized surface for corrosion resistance. Suitable for food packaging and medical equipment where weight reduction and clean appearance matter.
Lightweight AlEnterprise Strength
Xiamen Dongfeng Bearing Mechanical & Electrical Co., Ltd. — established 2014, 10+ years in linear motion component manufacturing. Our 5,000 m² Xiamen facility operates 12 production lines with 200+ employees. The pillow block assembly cell produces KH series units at 40,000+ pieces per month, integrating in-house produced LM bearings with precision-machined cast aluminum housings.
Certifications: ISO 9001:2015, CE conformity, SGS factory audit. Export markets: 50+ countries including Germany, USA, Japan, South Korea, India, and Brazil. Partners: Supplying packaging machinery manufacturers, conveyor system builders, medical device OEMs, and automation integrators.
Pre-sales: Housing selection and shaft support spacing calculation. After-sales: 18-month warranty, bearing replacement guidance. Customer case: Supplied 8,000 KH20 pillow block units to a Japanese packaging machinery OEM — 4-year supply relationship, zero housing failure reports, average bearing replacement interval 2.5 years (reduced from 8 months with previous press-fit design).
Manufacturing, Exhibition & Quality Control
Production Process & Quality Assurance
Process: ADC12 aluminum die casting → CNC machining (base flatness, bolt holes, bearing bore to H7) → anodizing (15 µm) → LM bearing installation with preload setting → retaining cap assembly → 100% shaft-fit and smoothness test → packaging.
Quality testing: Housing bore concentricity verified on CMM (±0.01 mm), bearing running torque measured per unit (≤0.05 N·m at 0.1 m/s), bolt hole position verified on gauge. Exhibitions: Exhibited at Pack Expo (USA), IFFA (food packaging, Frankfurt), and HOSPIMEDICA (medical equipment) to reach end-users who value tool-free maintenance.
FAQ
What is the MOQ for KH pillow block units?
MOQ is 100 pieces per size. Mixed sizes accepted with 100-piece minimum per individual size. The pre-installed LM bearing is included — no separate bearing purchase needed. Sample quantities of 5–10 pieces available for qualified buyers.
What are the shipping options and lead time?
FOB Xiamen. In-stock sizes (KH8–KH25): 7–10 business days. Larger sizes (KH30–KH50): 15–20 business days. Express courier (DHL/FedEx): 5–7 days for samples. Sea freight: 25–35 days to Europe, 18–25 days to USA.
Can I replace just the bearing inside the housing, or must I replace the entire unit?
The bearing is replaceable — unscrew the retaining cap, remove the worn LM bearing, and insert a new one of the same size (standard JIS LM..UU). The housing is reusable. This is the key cost-saving advantage over one-piece pressed housings. Replacement bearings are available separately from us or any JIS-standard LM supplier.
What payment methods do you accept?
T/T (30% deposit, 70% before shipment). L/C at sight for orders above USD 15,000. PayPal for sample orders under USD 2,000. Western Union for small orders on request.
Are samples available for testing?
Yes. Sample units of 5–10 pieces per size available with buyer covering shipping. Sample cost is credited toward bulk orders of 200+ pieces. Provide your required shaft diameter and mounting configuration to arrange.
Do you offer OEM branding, custom housing colors, or stainless housings?
Custom laser-engraved logo on housing base available for 200+ piece orders. Custom anodizing colors (black, blue, red) available for 500+ piece orders. Stainless steel (304) housing variant available for food-grade and wash-down applications — MOQ 200 pieces. Share your requirements.
Request a Quote for KH Pillow Block Units
Send your shaft diameter, housing material (aluminum or stainless), quantity, and any OEM requirements — we reply within one business day.
Request a Quote
