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.
Key Features
- 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
Common Sourcing Problems & How We Solve Them
Buyer Pain Points
- Inconsistent dimensional tolerances across batches cause machine downtime and re-work costs
- Suppliers unable to provide material certs, inspection reports or CE documentation for customs clearance
- Long lead times and high MOQ requirements make sample evaluation and first orders difficult
Dongfeng Solution
- ISO 9001:2015 process controls with CMM dimensional inspection on every production batch
- Full documentation package: material cert, SGS test report, CE declaration, packing list on request
- Flexible MOQ from 1 piece for samples; bulk order lead time 15–20 working days
Performance Data
- 10+ years of linear motion component manufacturing — 50+ export markets served
- Hardness tested to HRC 58–62; dimensional tolerance held to JIS / ISO / DIN standard grade
- CE & SGS certified; ISO 9001:2015 quality management system in production
Utility record
| 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 |
Application fit notes
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.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 Controltrol
Production Process & Quality Assuranceance
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 QuoteWhy Buyers Choose Dongfeng Bearing
Xiamen Dongfeng Bearing Mechanical & Electrical Co., Ltd. — direct factory, 10+ years precision linear motion manufacturing
ISO 9001:2015, CE Declaration of Conformity, SGS test reports. Documentation available for EU and North American import requirements.
12 precision grinding and CNC machining lines; monthly output 500,000+ pieces across linear bearing and guideway series.
Germany, USA, Japan, South Korea, India, Southeast Asia and 40+ other countries. FOB Xiamen with DHL / FedEx / sea freight options.
Technical selection support before order. Dimensional drawing, material cert and inspection report with shipment. 12-month warranty on manufacturing defects.
Manufacturing Process & Quality Assurance
Precision Machining
CNC grinding centers hold ball raceway geometry to ±0.003 mm. Induction hardening targets contact zones to HRC 58–62 without embrittling the full body.
CMM Dimensional Inspection
Every batch passes coordinate measuring machine (CMM) verification. Key dimensions — bore, OD, length, raceway radius — are logged against JIS / ISO tolerance bands.
Certification & QC
ISO 9001:2015 controls govern raw material intake, in-process check, and final inspection. SGS and CE documentation issued on request for each shipment.
Trade Shows & Partnerships
Regular exhibitor at Canton Fair and Hannover Messe. Established supply partnerships with automation integrators and machine tool OEMs across Europe and Asia.
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