Dongfeng
HGR45 Heavy-Duty Large Linear Guideway Rail
HGR45 heavy-duty linear guideway rail (45 mm width) with 45# high-carbon steel body induction-hardened to 58–62 HRC and 2.5 mm case depth. Paired with HGW45CA carriage delivers 62.8 kN dynamic and 112 kN static load — engineered for injection molding machines, heavy gantry welders, and large-format CNC routers.
Key Features
- 45 mm rail width, 38 mm height — engineered for axes requiring 60+ kN per-carriage load capacity
- 112 kN static load capacity when paired with HGW45CA carriage — sufficient for 500-ton injection molding machine platens
- Deep induction hardening: 58–62 HRC surface with 2.0–2.5 mm effective case depth for sustained heavy cyclic loading
- M12 mounting bolts at 60 mm pitch — resists lift-off and shear on inverted heavy-duty axes
- 4000 mm max standard rail length with precision splice joints for 8+ meter axes
- Straightness tolerance ≤0.02 mm/m on ground (P5) grade rails
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 Size | HGR 45 (45 × 38 mm) |
|---|---|
| Material | 45# High-Carbon Steel |
| Surface Hardness | 58–62 HRC |
| Case Depth | 2.0–2.5 mm |
| Precision Grade | Ground H (P5) / Rolled N (P7) |
| Dynamic Load (HGW45CA) | 62.8 kN |
| Static Load (HGW45CA) | 112 kN |
| Max Standard Length | 4000 mm |
| Bolt Hole Pitch / Size | 60 mm / M12 |
| Rail Weight | 6.2 kg/m |
Application fit notes
User Pain Point + Solution + Data
Large injection molding machines (500+ ton clamp force), heavy gantry welding platforms, and large-format CNC routers impose static loads exceeding 60 kN per axis — far beyond what HGR25 or HGR30 rails can sustain without raceway deformation. The HGR45 heavy-duty rail addresses this with a 45 mm rail width, 38 mm rail height, and 45# high-carbon steel body induction-hardened to 58–62 HRC. When paired with the HGW45 wide-body carriage, the system delivers 62.8 kN dynamic and 112 kN static load capacity per carriage — sufficient for the heaviest industrial axes.
Complete Specifications
| Parameter | Value |
|---|---|
| Rail Size | HGR 45 (45 mm width × 38 mm height) |
| Material | 45# High-Carbon Steel |
| Surface Hardness | 58–62 HRC (induction hardened) |
| Precision Grade | Ground H (P5) / Rolled N (P7) |
| Dynamic Load (HGW45CA paired) | 62.8 kN |
| Static Load (HGW45CA paired) | 112 kN |
| Max Standard Rail Length | 4000 mm (splice joint for longer) |
| Bolt Hole Pitch | 60 mm |
| Mounting Bolt | M12 |
| Rail Weight | 6.2 kg/m |
| Compatible Carriage | HGH45CA, HGW45CA, HGW45HA |
Product Advantages
112 kN Static Load Capacity
When paired with the HGW45CA wide-body carriage, the system sustains 112 kN static load — sufficient for 500-ton injection molding machine platens, heavy gantry welders, and large-format stone cutting CNC routers without requiring dual-rail configurations.
Heavy DutyDeep Induction Hardening
Raceway surface hardened to 58–62 HRC with effective hardening depth of 2.0–2.5 mm. The deeper case depth (versus 1.5 mm on smaller HGR sizes) ensures load-bearing capacity does not degrade under sustained heavy cyclic loading over years of operation.
2.5 mm Case DepthM12 Heavy Mounting System
60 mm bolt pitch with M12 mounting bolts — significantly larger than the M6/M8 used on HGR20–30. The robust mounting resists lift-off and shear forces on inverted or vertical heavy-duty axes where vibration and shock loads are present.
M12 BoltsLong-Span Splice Joints
Rails exceeding 4000 mm are supplied as joined sections with precision-matched splice joints. Straightness tolerance across the splice is held to the same P5 grade as the individual rail, enabling axes of 8+ meters for large gantry equipment.
Splice JointEnterprise Strength
Xiamen Dongfeng Bearing Mechanical & Electrical Co., Ltd.Ltd. — founded 2014, 10+ years specializing in heavy-duty linear motion. Our 5,000 m² Xiamen facility includes a dedicated heavy-series production cell with large-capacity induction hardening equipment (up to 250 kW) capable of handling HGR35–HGR65 rail sizes. 200+ employees, 12 production lines, monthly capacity of 15,000+ meters for HGR45 and above.
Certifications: ISO 9001:2015, CE, SGS factory audit. Export markets: 50+ countries with strong heavy-industry supply presence in Germany, Italy, Turkey, India, and Brazil. Partners: Supplying injection molding machine manufacturers, gantry welding system builders, and heavy CNC router OEMs.
Pre-sales: Application load calculation and rail size selection assistance. After-sales: 18-month warranty, on-site installation guidance for large orders. Customer case: Supplied 3,200 meters of HGR45 rail + HGW45CA carriages to a Turkish injection molding machine manufacturer — 4-year continuous operation, zero rail replacement, measured raceway wear <0.01 mm.mm.
Manufacturing, Exhibition & Quality Controltrol
Production Process & Quality Assuranceance
Process: 45# high-carbon steel bar → CNC turning (rail profile) → 250 kW induction hardening (58–62 HRC, case depth 2.0–2.5 mm) → precision grinding (raceway flatness ≤5 µm, straightness ≤0.02 mm/m) → mounting hole drilling → surface treatment (anti-corrosion oil) → CMM inspection → packaging. Each 4000 mm rail is checked for full-length straightness on a dedicated measuring bench.
Quality testing: Hardness test on both raceway surfaces per rail, straightness measured over full length, mounting hole position verified on CMM. Load capacity validated on hydraulic test rig at 1.2× rated static load. Exhibitions: Exhibited at CIMT (Beijing), EMO (Hanover), and PTC Asia to engage heavy-machine-tool manufacturers directly.
FAQ
What is the MOQ for HGR45 heavy-duty rails?
MOQ is 30 pieces (or 60 meters) per order. This can be a mix of rail lengths — e.g., 10× 1000 mm + 5× 2000 mm + 3× 4000 mm. Matching HGW45 carriages have an MOQ of 20 pieces. Contact us for sample pricing.
How are 4-meter rails shipped safely?
Rails up to 2000 mm ship in standard export cartons with foam protection. Rails of 3000–4000 mm are packed in custom wooden crates with steel-reinforced supports to prevent bending during transit. FOB Xiamen. Sea freight is standard; oversized cargo surcharge may apply for 4000 mm rails.
Can HGR45 rails be supplied longer than 4000 mm?
Yes. Rails longer than 4000 mm are supplied as joined sections with precision splice joints. Maximum practical length is approximately 8000 mm (2× 4000 mm joined). Straightness tolerance across the splice joint is held to P5 grade. Custom splice pitch available for specific machine frame designs.
What payment terms are available for large orders?
T/T (30% deposit, 70% before shipment) is standard. L/C at sight is accepted for orders above USD 20,000 — recommended for large HGR45 orders given the per-unit value. Escrow service available for first-time buyers on request.
Can I order a sample rail and carriage for testing?
Yes. A single HGR45 rail (1000 mm) + HGW45CA carriage sample set is available. Buyer covers shipping and sample cost. For bulk orders of 100+ carriages, the sample cost is fully credited. Contact us with your shipping destination for a landed-cost estimate.
Do you provide OEM services for heavy-series rails?
Yes. Custom rail marking (part number, buyer logo) is available for 100+ piece orders. OEM packaging with buyer branding for 300+ piece orders. Custom bolt hole patterns or non-standard rail lengths can be discussed for 500+ piece orders — share your machine frame drawing.
Request a Quote for HGR45 Heavy-Duty Rails
Send your required rail lengths, carriage type (HGH45 or HGW45), precision grade, and quantity — 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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