Dongfeng
SFU2510 Rolled Ball Screw Assembly with Flange Nut
SFU2510 rolled ball screw assembly with 25 mm shaft and 10 mm lead, delivering 17.2 kN dynamic load (2.5× the SFU1605) at C7 precision grade. Designed for mid-size CNC router X/Y axes up to 3 m travel, plasma cutting tables, and woodworking gantry machines where the SFU1605's load capacity is insufficient.
Key Features
- 17.2 kN dynamic load — 2.5× the SFU1605's capacity for mid-size CNC router and plasma table axes
- 10 mm lead doubles linear travel per revolution versus SFU1605, enabling 6 m/min feed at 600 RPM
- C7 precision grade (±0.05 mm/300 mm) — sufficient for CNC router and plasma cutting positioning requirements
- Complete assembly: shaft end-machined for BK25/BF25 blocks with pre-loaded single flange nut fitted
- Standard lengths up to 3000 mm — covers most mid-size CNC X/Y axes without splice joints
- GCr15 chrome steel induction-hardened to HRC 58–62 for extended wear life under heavy gantry weight
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
| Precision Grade | C7 (ISO 3408) |
|---|---|
| Shaft Diameter | 25 mm |
| Lead | 10 mm |
| Lead Accuracy | ±0.05 mm / 300 mm |
| Material | Chrome Steel (GCr15 / 52100) |
| Shaft Hardness | HRC 58–62 |
| Dynamic Load | 17.2 kN (single nut) |
| Static Load | 26.5 kN |
| Standard Lengths | 300 mm – 3000 mm |
| Support Block | BK25 / BF25 compatible |
Application fit notes
User Pain Point + Solution + Data
The SFU1605 (16 mm × 5 mm lead) is the go-to ball screw for desktop CNC and 3D printers, but when builders scale up to mid-size CNC routers (1.5–3 m travel) and light plasma cutters, the 1605's 6.8 kN dynamic load becomes the bottleneck. The SFU2510 steps up to a 25 mm shaft with 10 mm lead, delivering 17.2 kN dynamic load — 2.5× the 1605's capacity — while doubling the linear travel per revolution (10 mm vs 5 mm). At C7 precision grade (±0.05 mm/300 mm), this screw hits the sweet spot for CNC router X/Y axes up to 3 m travel, plasma cutting tables, and woodworking gantry machines where the 1605 deflects under heavy gantry weight. weight.
Complete Specifications
| Parameter | Value |
|---|---|
| Precision Grade | C7 (ISO 3408) |
| Shaft Diameter | 25 mm |
| Lead | 10 mm |
| Lead Accuracy | ±0.05 mm / 300 mm |
| Material | GCr15 Chrome Steel (52100 equiv.) |
| Shaft Hardness | HRC 58–62 (induction hardened) |
| Dynamic Load Capacity | 17.2 kN (single nut) |
| Static Load Capacity | 26.5 kN |
| Standard Lengths | 300 mm – 3000 mm |
| Nut Type | Single flange nut, pre-loaded |
| Support Bearing Block | BK25 / BF25 compatible |
Product Advantages
2.5× Load vs SFU1605
17.2 kN dynamic load — 2.5× the SFU1605's 6.8 kN. The 25 mm shaft diameter also reduces deflection under gantry weight, enabling longer unsupported spans without intermediate support bearings.ngs.
17.2 kN10 mm Lead for High Feed
10 mm lead means 10 mm linear travel per shaft revolution — double the SFU1605's 5 mm. At 600 RPM motor speed, the axis moves at 6 m/min, sufficient for plasma cutting and woodworking router feed rates without high-RPM motors.ors.
10 mm LeadComplete Assembly
Shaft arrives with both ends machined for BK25/BF25 bearing blocks and a pre-loaded single flange nut fitted. No secondary turning needed — mount the bearing blocks, attach the nut housing, and the axis is ready.
Ready to InstallUp to 3 m Standard Length
Standard lengths up to 3000 mm cover most mid-size CNC router and plasma table X/Y axes in one piece. Custom lengths and end machining per customer drawing available — no splice joint needed for axes under 3 m.
3000 mm MaxEnterprise Strength
Xiamen Dongfeng Bearing Mechanical & Electrical Co., Ltd.Ltd. — established 2014, 10+ years specializing in ball screw manufacturing. Our 5,000 m² Xiamen facility operates 12 production lines with 200+ employees, including a dedicated rolled ball screw cell producing SFU series at 30,000+ assemblies per month.
Certifications: ISO 9001:2015, CE conformity, SGS factory audit. Export markets: 50+ countries including Germany, Italy, USA, India, Turkey, and Brazil. Partners: Supplying CNC router manufacturers, plasma cutting table builders, and woodworking machinery OEMs.
Pre-sales: Shaft length and end machining drawing confirmation within 4 hours. After-sales: 18-month warranty, installation guidance. Customer case: Supplied 6,000 SFU2510-1500 assemblies to a US-based CNC router manufacturer over 3 years — 0.03% defect rate, zero warranty claims related to lead accuracy deviation.
Manufacturing, Exhibition & Quality Controltrol
Production Process & Quality Assuranceance
Process: GCr15 raw bar → CNC turning (shaft profile, end journals) → induction hardening (HRC 58–62, raceway only) → thread rolling (ball track formed by displacement, not cutting) → nut body machining → ball circuit assembly with pre-load setting → end machining per BK/BF spec → lead accuracy measurement → packaging.
Quality testing: Lead accuracy measured by laser interferometer per piece (±0.05 mm/300 mm), shaft straightness ≤0.05 mm/m, nut running torque verified at 3 points along full travel. Exhibitions: Exhibited at CIMT (Beijing), IWF (woodworking machinery, Atlanta), and FabTech (metal fabrication, Chicago) to reach mid-size CNC and plasma equipment builders.
FAQ
What is the MOQ for SFU2510 ball screw assemblies?
MOQ is 50 pieces per length configuration. Mixed lengths accepted with 50-piece minimum per individual SKU. For custom end machining, MOQ is 30 pieces per drawing. Sample quantities of 2–5 pieces available for qualified buyers.
What are the shipping options and lead time?
FOB Xiamen. Standard lengths (300–1500 mm): 7–15 business days. Longer lengths (2000–3000 mm): 15–25 business days. Custom end machining: 20–30 business days. Sea freight for bulk: 25–35 days to Europe, 18–25 days to USA. Long shafts (2000+ mm) require special crate packing.
How are long ball screws (2+ meters) packaged and shipped safely?
Shafts up to 1500 mm ship in standard export cartons with foam tube protection. Shafts of 2000–3000 mm are packed in wooden crates with steel-reinforced supports and V-blocks to prevent bending. Oversized cargo surcharge may apply for 3000 mm shafts via sea freight.
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 — recommended for large ball screw orders given per-unit value. PayPal for sample orders under USD 3,000.
Can I get samples for testing before a bulk order?
Yes. Sample assemblies (standard length 500 mm) are available with buyer covering shipping. Sample cost is credited toward bulk orders of 100+ pieces. Provide your required length and end machining specifications.
Do you offer custom end machining and OEM branding?
Yes. Custom end machining per your 2D drawing or DXF is available for 30+ piece orders — journal diameter, keyway, thread, circlip groove all configurable. OEM laser-engraved part marking on shaft end available for 100+ piece orders. Custom nut housing designs available for 200+ piece orders.
Request a Quote for SFU2510 Assemblies
Send your required shaft length, end machining drawing (or BK/BF block model), 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.
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