Dongfeng
SFU Series Rolled Ball Screw Assembly
SFU1605 rolled ball screw assembly with C7 precision grade, 5 mm lead, and pre-loaded single nut — suited for 3D printers, laser engravers, and light CNC gantry axes where cost-efficient linear motion at ±0.05 mm/300 mm positioning tolerance is sufficient.
Highlights
- C7 precision grade with lead accuracy ±0.05 mm/300 mm — meets most desktop CNC, engraver and 3D printer axis specs
- 16 mm shaft diameter, 5 mm lead (1605 designation) — compact form factor fits standard 6204 support bearings without modification
- Chrome steel screw and nut body, induction-hardened ball track — shaft hardness HRC 58-62 for extended wear life under cyclic loads
- Single pre-loaded ball nut supplied as complete assembly with end-machined shaft, ready to install with BK/BF fixed bearing blocks
- Low-noise recirculating ball circuit — measured running noise typically under 55 dB in bench tests at 600 RPM
- Available in standard lengths 300 mm to 1500 mm; custom cut-to-length with end machining available upon request
- Metric thread flange nut with four M4 mounting holes, compatible with standard SFU1605 nut housings across the market
- Suitable for horizontal and vertical axis use; lubrication port on nut body for grease or oil maintenance
| Precision Grade | C7 (ISO 3408) |
|---|---|
| Shaft Diameter | 16 mm |
| Lead | 5 mm |
| Lead Accuracy | ±0.05 mm / 300 mm |
| Material | Chrome Steel (GCr15 / 52100) |
| Shaft Hardness | HRC 58-62 |
| Dynamic Load Capacity | 6.8 kN (single nut) |
| Standard Lengths | 300 mm – 1500 mm |
| Lubrication | Grease or oil via nut port |
| Reference SKU | SFU-1605-500 |
SFU Series — Rolled Ball Screw
The SFU1605 is a 16 mm diameter, 5 mm lead rolled ball screw assembly built from GCr15 chrome steel with an induction-hardened ball track (HRC 58-62). At C7 precision grade per ISO 3408, lead accuracy is ±0.05 mm per 300 mm — within tolerance for desktop CNC routers, diode laser engravers, and FDM 3D printer Z/X axes where sub-0.1 mm repeatability is the practical requirement. The assembly ships complete: end-machined shaft plus a single pre-loaded flange nut, ready to mount with standard BK12/BF12 bearing blocks and SFU1605 nut housings.
Specifications
| Parameter | Value |
|---|---|
| Precision Grade | C7 (ISO 3408) |
| Shaft Diameter | 16 mm |
| Lead | 5 mm |
| Lead Accuracy | ±0.05 mm / 300 mm |
| Material | GCr15 Chrome Steel (equiv. 52100) |
| Shaft Hardness | HRC 58-62 (induction hardened) |
| Dynamic Load Capacity | 6.8 kN (single nut) |
| Standard Lengths | 300 mm – 1500 mm |
Key Features
Complete Assembly
Shaft arrives with both ends machined and a pre-loaded flange nut fitted. No secondary turning needed for standard BK/BF block configurations.
Ready to InstallLow Running Noise
Recirculating ball circuit geometry keeps bench-measured noise typically below 55 dB at 600 RPM — relevant for open-frame engravers and lab equipment.
Low NoiseMarket-Compatible Nut
Four-hole M4 flange pattern matches SFU1605 nut housings from most linear motion suppliers, so it drops into existing machine designs without redesign.
Metric SeriesTypical Applications
Desktop CNC routers (X/Y axis, up to ~5 kg carriage), CO2 and diode laser engravers, FDM and resin 3D printer Z-axis, light pick-and-place gantries, and DIY automation fixtures. For axes requiring positioning under ±0.01 mm or sustained loads above 15 kN, the SFE Series ground variant is a better fit.
FAQ
What is the MOQ and what lead time should I expect?
MOQ is 50 pieces per SKU (length + diameter combination). Standard lengths 300–1000 mm typically ship within 7-15 business days. Custom lengths with special end machining: 15-25 business days. Exact lead times confirmed at order.
Can I order custom lengths or non-standard end machining?
Yes. Shaft length up to 1500 mm (longer on request), and end machining can be adjusted to customer drawing — journal diameter, keyway, thread. Please share your 2D drawing or DXF when inquiring.
How does the C7 rolled screw differ from the C5 ground version?
Rolling forms the ball track without material removal, giving ±0.05 mm/300 mm accuracy. C5 grinding removes material to achieve ±0.008 mm/300 mm — roughly 6× tighter. For 3D printers and engravers C7 is cost-efficient; for semiconductor or medical motion stages the SFE ground series is the right choice.
Get Pricing & Lead Time
Send shaft length, quantity, and end machining requirements. We confirm availability and price within 1 business day.
Request a Quote
