Dongfeng
EGH Series Miniature Linear Guideway Rail & Carriage
EGH Series miniature linear guideway with rail widths from 9 mm to 15 mm and Gothic-arch two-row ball circuit delivering 5.5 kN dynamic load. Designed for semiconductor inspection stages, medical robots, and compact desktop CNC where ultra-low axis height is critical.
Key Features
- Rail widths from 9 mm with carriage heights as low as 6 mm — fits semiconductor, medical, and compact automation envelopes
- Two-row Gothic-arch ball circuit delivers 5.5 kN dynamic load with approximately 30% lower friction than four-row designs
- Stainless steel (9Cr18Mo) option for medical, food-grade, and cleanroom applications — HRC 54–58
- Precision-ground raceway (Ra ≤0.4 µm) as standard — no rolled option, ensuring smooth low-vibration motion
- 1000 mm max standard rail length with splice joint option for longer axes
- Running noise ≤48 dB at 0.5 m/s — suitable for laboratory and medical environments
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
| Rail Series | EGS 9 / 12 / 15 |
|---|---|
| Carriage Series | EGH 9 / 12 / 15 (+ EGL low height) |
| Ball Circuit | Two-row Gothic arch |
| Precision Grade | Ground H (P5) standard |
| Rail Material | GCr15 or 9Cr18Mo stainless |
| Dynamic Load (EGH15CA) | 5.5 kN |
| Static Load (EGH15CA) | 9.2 kN |
| Max Rail Length | 1000 mm (splice joint option) |
| Sealing | End seal + side seal |
| Weight (EGH15CA) | 0.038 kg |
Application fit notes
User Pain Point + Solution + Data
Semiconductor inspection stages, medical pipetting robots, and compact desktop CNC machines need linear guidance in tight envelopes where standard 15 mm HGR rails are too bulky. The EGH Series miniature guideway addresses this with rail widths from 9 mm to 15 mm and carriage heights as low as 6 mm. Despite the small footprint, the EGH15CA carriage delivers 5.5 kN dynamic load capacity through its two-row Gothic-arch ball circuit, sufficient for precision pick-and-place heads and small-format XY stages.
Complete Specifications
| Parameter | Value |
|---|---|
| Rail Series | EGS 9 / 12 / 15 (miniature rail) |
| Carriage Series | EGH 9 / 12 / 15 (standard height) + EGL (low height) |
| Ball Circuit | Two-row Gothic arch (point contact) |
| Precision Grade | Ground H (P5) standard |
| Rail Material | GCr15 Chrome Steel, HRC 58–62 |
| Dynamic Load (EGH15CA) | 5.5 kN |
| Static Load (EGH15CA) | 9.2 kN |
| Max Rail Length | 1000 mm (longer via splice joint) |
| Sealing | End seal + side seal |
| Weight (EGH15CA) | 0.038 kg |
Product Advantages
Ultra-Compact Envelope
Rail widths from 9 mm with carriage heights as low as 6 mm. Designed for semiconductor wafer handlers, lab automation, and miniature XY stages where every millimeter of axis height affects overall machine footprint.
9 mm Min WidthGothic-Arch Two-Row Geometry
Two-row Gothic-arch ball contact provides equal load capacity in all four directions with fewer balls than a four-row design. This reduces friction by approximately 30% versus comparable four-row carriages at equivalent speeds.
Low FrictionStainless Steel Option
Available in martensitic stainless steel (9Cr18Mo) for medical, food processing, and cleanroom applications where chrome steel corrosion resistance is insufficient. Stainless variant maintains HRC 54–58 hardness.
Stainless OptionPrecision-Ground Raceway
All EGH rails are ground-precision H grade (P5) standard — no rolled option. Raceway surface roughness Ra ≤0.4 µm ensures smooth low-vibration motion critical for optical inspection and measurement axes.
P5 Ground OnlyEnterprise Strength
Xiamen Dongfeng Bearing Mechanical & Electrical Co., Ltd.Ltd. was established in 2014 and has over 10 years of experience manufacturing precision linear motion components. Our 5,000 m² Xiamen factory operates 12 production lines with 200+ employees, including a dedicated miniature guideway cell producing EGH/MGN series at 30,000+ units per month.
Certifications: ISO 9001:2015, CE conformity, SGS factory audit. Export markets: 50+ countries including Germany, USA, Japan, South Korea, Switzerland, and the Netherlands — with particular strength in semiconductor and medical equipment supply chains.
Pre-sales: Application engineering support for miniature axis design, dimensional drawing confirmation within 4 hours. After-sales: 18-month warranty, lifetime technical support. Customer case: Supplied EGH15CA carriages to a Japanese semiconductor handler OEM — zero field failure reports over 3 years and 8,000 units in service.
Manufacturing, Exhibition & Quality Controltrol
Production Process & Quality Assuranceance
Process: GCr15 or 9Cr18Mo bar stock → precision turning → vacuum hardening (HRC 58–62 for chrome steel, 54–58 for stainless) → surface grinding (raceway Ra ≤0.4 µm) → ball circuit assembly → preload calibration → final CMM inspection. 100% of miniature carriages are tested for running smoothness before packaging.
Quality testing: Dimensional accuracy on CMM (Mitutoyo), running noise ≤48 dB @ 0.5 m/s, starting friction force measured per batch. Exhibitions: Showcased at SEMICON China, MEDTEC Europe, and PTC Asia to align with semiconductor and medical equipment standards.
FAQ
What is the MOQ for miniature EGH guideways?
MOQ is 100 pieces per size (rail + carriage set). For mixed sizes, MOQ applies per individual SKU. Sample orders of 5–10 sets are available for qualified buyers — contact us to arrange.
What shipping methods are available and how long does delivery take?
FOB Xiamen. Express courier (DHL/FedEx) for samples: 5–7 business days. Sea freight for bulk: 25–35 days to Europe, 18–25 days to USA. Air freight available for urgent orders. Lead time for in-stock EGH9–EGH15: 10–15 business days; custom lengths: 20–30 days.
How are miniature guideways packaged for shipping?
Each rail-carriage set is anti-corrosion oiled, vacuum-sealed in individual plastic bags, then placed in foam-lined partitioned cartons. 20 sets per carton for EGH9–12, 10 sets for EGH15. Wooden crate packing for bulk export orders.
What payment methods do you accept?
T/T (30% deposit, 70% before shipment) is standard. L/C at sight for orders above USD 20,000. PayPal and Western Union accepted for sample orders under USD 3,000.
Are samples available for testing before bulk order?
Yes. Samples are available with buyer covering shipping cost. Sample cost is credited toward bulk orders of 200+ pieces. Provide your required size, rail length, and carriage type to arrange.
Can you supply stainless steel variants and custom Logo?
Stainless steel (9Cr18Mo) EGH rails and carriages are available — specify at inquiry. Custom laser-engraved logo on rail end face is available for 200+ piece orders. OEM packaging with buyer branding available for 500+ piece orders.
Request a Quote for EGH Miniature Guideways
Send your rail size, carriage type, required length, and quantity — we reply within one business day with pricing and lead time.
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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