Dongfeng
MGN Series Stainless Steel Miniature Linear Guide
MGN Series stainless steel miniature linear guide with 9Cr18Mo martensitic stainless as standard material, Gothic-arch two-row ball circuit delivering 3.7 kN dynamic load at MGN12C. Designed for 3D printers, desktop CNC, medical devices, and humid environments where corrosion resistance is essential.
Highlights
- 9Cr18Mo martensitic stainless steel is the standard material β corrosion resistant for humid, medical, and food-grade environments
- Two-row Gothic-arch ball circuit with 3.7 kN dynamic load (MGN12C) and equal four-direction load capacity
- Friction coefficient 0.002β0.004 β enables smooth manual sliding and low motor torque on stepper-driven axes
- MOQ 50 pieces per size β accessible for small machine builders and maker-market applications
- Chrome steel (GCr15) option available for indoor cost-sensitive applications
- Stainless balls and retainer throughout for full corrosion resistance
| Rail Series | MGN 9 / 12 / 15 |
|---|---|
| Carriage Types | MGN-C (standard) / MGN-H (long) |
| Ball Circuit | Two-row Gothic arch |
| Material (standard) | 9Cr18Mo stainless steel |
| Hardness | HRC 54β58 (stainless) |
| Dynamic Load (MGN12C) | 3.7 kN |
| Static Load (MGN12C) | 5.4 kN |
| Max Rail Length | 1000 mm |
| Friction Coefficient | 0.002β0.004 |
| Weight (MGN12C) | 0.025 kg |
User Pain Point + Solution + Data
3D printer builders, desktop laser engraver manufacturers, and DIY CNC hobbyists struggle with linear guides that rust in humid environments, corrode when exposed to resins or cleaning solvents, and are too expensive in small quantities. The MGN Series solves all three: the standard material is martensitic stainless steel (9Cr18Mo) with HRC 54β58 hardness β no additional plating needed for typical indoor and workshop humidity. The two-row Gothic-arch design delivers 3.7 kN dynamic load at MGN12C, and pricing is structured for small-quantity orders starting at MOQ 50 pieces.
Complete Specifications
| Parameter | Value |
|---|---|
| Rail Series | MGN 9 / 12 / 15 (stainless standard) |
| Carriage Types | MGN-C (standard flange) / MGN-H (long carriage, higher load) |
| Ball Circuit | Two-row Gothic arch |
| Material (standard) | 9Cr18Mo martensitic stainless steel |
| Material (option) | GCr15 chrome steel (lower cost, indoor use) |
| Hardness | HRC 54β58 (stainless) / 58β62 (chrome steel) |
| Dynamic Load (MGN12C) | 3.7 kN |
| Static Load (MGN12C) | 5.4 kN |
| Max Rail Length | 1000 mm (splice available) |
| Sealing | End seal standard |
| Weight (MGN12C carriage) | 0.025 kg |
Product Advantages
Stainless Steel as Standard
9Cr18Mo martensitic stainless is the default material, not an upgrade. This eliminates corrosion concerns for 3D printers in humid workshops, medical devices requiring wipe-down cleaning, and food packaging equipment subject to wash-down.
Corrosion ResistantGothic-Arch Equal Load
Two-row Gothic-arch geometry transmits equal load in radial and reverse-radial directions. The contact angle is optimized so that the carriage self-adjusts to maintain even ball pressure even under slight rail misalignment.
Equal 4-Direction LoadLow-Friction Operation
Reduced ball count versus four-row designs means lower friction torque. MGN12C carriage friction coefficient is 0.002β0.004, enabling smooth manual sliding and low motor torque requirements on battery-powered or stepper-driven axes.
Friction 0.002β0.004Hobby-Friendly MOQ
MOQ starts at 50 pieces per size β accessible for small machine builders and makers. Chrome steel option (GCr15) further reduces cost for purely indoor applications. Sample sets of 5β10 pieces available for prototyping.
MOQ 50 pcsEnterprise Strength
Xiamen Dongfeng Bearing Mechanical & Electrical Co., Ltd. β established 2014, 10+ years in linear motion manufacturing. Our 5,000 mΒ² facility operates 12 production lines with 200+ employees. The miniature guide cell produces MGN series at 40,000+ sets per month, serving both industrial OEMs and small machine builders.
Certifications: ISO 9001:2015, CE, SGS. Export markets: 50+ countries β strong presence in North America (USA, Canada), Europe (Germany, Netherlands, UK), and Asia-Pacific (Japan, South Korea, Australia). Partners: Supplying 3D printer manufacturers, desktop CNC builders, and medical device OEMs.
Pre-sales: Application sizing assistance, CAD models available. After-sales: 18-month warranty, responsive email/video technical support. Customer case: Supplied 15,000 MGN12C stainless sets to a North American 3D printer manufacturer over 2 years β 0.02% defect rate, zero warranty claims related to corrosion.
Manufacturing, Exhibition & Quality Control
Production Process & Quality Assurance
Process: 9Cr18Mo stainless bar β turning β vacuum hardening (HRC 54β58) β surface grinding (Ra β€0.4 Β΅m) β Gothic-arch raceway profiling β ball circuit assembly with stainless balls β preload setting β 100% smoothness test β packaging. Stainless steel balls and retainers used throughout for full corrosion resistance.
Quality testing: Raceway profile measured on contour projector, running smoothness verified per piece, friction torque sampled per batch. Exhibitions: Participated in Maker Faire Shenzhen, TCT Asia (3D printing), and Formnext to understand the evolving needs of desktop and maker-market linear motion users.
FAQ
What is the MOQ for MGN stainless steel guides?
MOQ is 50 pieces per size and carriage type. Mixed MGN9/MGN12/MGN15 sizes accepted in one order with 50-piece minimum per SKU. Sample sets of 5β10 pieces available β contact us with your size and shipping address.
How long is the lead time and what shipping options are available?
In-stock MGN9βMGN15 sizes: 7β10 business days. Custom rail lengths: 15β25 business days. Express shipping (DHL/FedEx): 5β7 days worldwide. Sea freight for bulk: 25β35 days to Europe, 18β25 days to North America. FOB Xiamen.
How are MGN guides packaged?
Each rail-carriage set is individually anti-corrosion oiled and vacuum-sealed. Sets packed in foam-lined cartons (20 per carton for MGN9β12, 10 per carton for MGN15). Bulk export orders use wooden crates with moisture barrier.
What payment terms do you accept?
T/T (30% deposit, 70% before shipment) for standard orders. L/C at sight for orders above USD 20,000. PayPal accepted for sample orders under USD 2,000. Western Union for small orders on request.
Can I get samples for prototyping?
Yes. Sample sets of 5β10 pieces per size are available with buyer covering shipping. For production orders of 200+ pieces, sample cost is fully credited. Provide your required size, rail length, and carriage type (C or H).
Do you offer OEM branding and custom packaging for small machine builders?
Yes. Custom laser-engraved logo on carriage body available for 100+ piece orders. OEM branded packaging available for 300+ piece orders. We also offer custom rail lengths and pre-drilled mounting hole patterns for 500+ piece orders β share your drawing for quotation.
Request a Quote for MGN Stainless Guides
Send your rail size, carriage type, length, and quantity β we reply within one business day with pricing and lead time.
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