Dongfeng
HGH Series Flange-Type Linear Guideway Carriage Block
HGH Series flange-type carriage blocks run on HGR rails via a four-row ball recirculation circuit, with a self-aligning angular tolerance of ±0.5° that absorbs minor rail misalignment — suited for retrofit builds and replacement sourcing on CNC and automation frames.
Key Features
- Four-row ball recirculation circuit carries radial, reverse-radial and both lateral load directions simultaneously
- Self-aligning angular tolerance ±0.5° compensates minor rail mounting errors without bearing preload loss
- Flange-type (HGH) body with four top-face mounting holes — interchangeable with standard HGH profile carriage blocks
- Available in clearance (C0), light preload (C1) and medium preload (C2) grades to match axis rigidity requirements
- Chrome steel balls (GCr15) running in hardened steel raceways — no ceramic hybrid required for most machine tool duty
- Integrated end-seal and side-seal strip keeps chips and coolant out of the ball circuit
- Lubrication port on carriage top face accepts standard grease nipple or central lube line connector
- Sizes HGH 15 / 20 / 25 / 30 / 35 / 45 cover most CNC machine tool and industrial automation requirements
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
| Carriage Series | HGH 15 / 20 / 25 / 30 / 35 / 45 |
|---|---|
| Precision Grade | Ground H (P5) / Rolled N (P7) |
| Preload Grade | C0 (clearance) / C1 (light) / C2 (medium) |
| Material | GCr15 Chrome Steel balls; hardened steel body |
| Dynamic Load Capacity (HGH20CA) | 18.0 kN |
| Static Load Capacity (HGH20CA) | 29.5 kN |
| Self-Aligning Tolerance | ±0.5° |
| Sealing | End seal + side seal strip, IP40 equivalent |
Application fit notes
HGH Series — Flange-Type Linear Guideway Carriage Block
When sourcing carriage blocks for a retrofit or a rebuild, the two common failure points are preload loss from accumulated rail misalignment and seal failure that lets coolant contaminate the ball circuit. The HGH Series carriage addresses both: a ±0.5° self-aligning angular tolerance absorbs the small flatness errors that appear on welded or long-span machine bases, and a combined end-seal plus side-seal strip keeps the ball recirculation channel isolated from chips and cutting fluid. The flange-type body (four top-face mounting holes, full-width flange footprint) fits the standard HGH mounting pattern used across most Taiwanese and Chinese machine tool platforms.
Specifications
| Parameter | Value |
|---|---|
| Carriage Series | HGH 15 / 20 / 25 / 30 / 35 / 45 |
| Precision Grade | Ground H (P5) / Rolled N (P7) |
| Preload Grade | C0 (clearance) / C1 (light preload) / C2 (medium preload) |
| Ball Material | GCr15 Chrome Steel |
| Dynamic Load Capacity (HGH20CA) | 18.0 kN |
| Static Load Capacity (HGH20CA) | 29.5 kN |
| Self-Aligning Tolerance | ±0.5° |
| Sealing | End seal + side seal strip, IP40 equivalent |
Key Features
Four-Row Ball Recirculation
Two upper rows and two lower rows of recirculating balls let a single carriage carry loads in all four directions — radial, reverse-radial, and both lateral — without needing a paired opposing carriage on the same rail. This simplifies axis design on compact machine frames.
High RigiditySelf-Aligning ±0.5° Tolerance
Long machine bases and welded steel frames rarely achieve perfect rail coplanarity. The HGH carriage geometry accommodates up to ±0.5° of angular deviation, so the ball circuit runs under even contact pressure rather than edge-loading a single ball row. Preload stability is maintained without re-shimming.
CNC AutomationPreload Grade Selection
C0 (zero clearance) suits high-speed linear transfer systems where noise is a concern. C1 light preload covers most CNC milling and turning axes. C2 medium preload is specified for heavy-cutting spindle heads where axis deflection under load must stay below 2 µm. Specify grade at order time.
Metric SeriesWhat is the MOQ for HGH carriage blocks, and can I mix sizes in one order?
Standard MOQ is 50 pieces per SKU (size + preload grade combination). Mixed-size orders are accepted; the 50-piece MOQ applies per individual SKU. For small-batch sample orders, contact us — minimum sample quantities are available upon request.
Do HGH carriages fit HGR rails from other manufacturers?
HGH carriages are dimensioned to the standard HGR rail cross-section profile. They will mount on any rail ground to that profile, regardless of brand. Fit accuracy depends on the rail's actual width and raceway radius tolerances matching the HGH bore. We recommend verifying against our dimensional drawing before bulk ordering for third-party rail installations.ons.
What lubrication is recommended, and how often should carriages be re-greased?
Lithium-based grease NLGI Grade 2 is suitable for most applications. Re-greasing interval depends on travel speed, load, and environment — a starting reference is every 100 km of travel or every 3 months, whichever comes first. For centralized lubrication systems, the carriage top port accepts standard M6 grease nipple fittings. Specific lubrication schedules for high-speed or food-grade applications are available upon request.
Request a Quote for HGH Carriage Blocks
Provide your carriage size, height code, precision grade and preload requirement — we will confirm availability, pricing and lead time 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.
Customer Application Cases
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