Every load-bearing specification of the Songju component range on one page: electric spindles (0.5–100 kW, up to 120,000 RPM, 0.001 mm runout), linear guideways (9 series, P/H/SP, interchangeable with HIWIN/THK/NSK), ball screws (C2/C3 ground, 8–100 mm, DIN 69051), and precision bearings (P5/P4/P2). Bookmark this page as the single source for quoting, benchmarking, or interchange checks — company facts and quality documents included at the end.
Electric Spindles — Key Specifications
| Electric spindles | Specification |
|---|---|
| Models | 27 across machining, grinding, milling, turning, and high-speed motor categories |
| Power range | 0.5–100 kW |
| Max speed | Up to 120,000 RPM (internal grinding) |
| Runout accuracy | 0.001 mm |
| Tool interfaces | BT, HSK, ISO, Capto |
| Motor type | Synchronous and asynchronous |
| Delivery | Standard models 2–4 weeks; OEM/custom quoted |
Linear Guideways — Key Specifications
| Linear guideways | Specification |
|---|---|
| Series | 9 series, ball and roller types (LG ball series 15–45 mm standard duty) |
| Precision grades | P / H / SP |
| Rail widths | 15–65 mm |
| Rail hardness | 58–62 HRC, induction hardened |
| Running parallelism | ≤ 0.003 mm / 1000 mm (grade-dependent) |
| Speed / acceleration | 150 m/min / 40 m/s² |
| Max rail length | 3000 mm single piece |
| Temperature range | −20 °C to +80 °C |
| Interchangeability | HIWIN HG, THK SHS/HSR, NSK LH, IKO standards |
Ball Screws — Key Specifications
| Ball screws | Specification |
|---|---|
| Series | FC, FCD, FY, FYB, FYD (5 series) |
| Diameter range | 8–100 mm |
| Accuracy | C2 / C3 precision ground, DIN 69051 |
| Lead error (C2) | ±5 µm / 300 mm |
| Applications | CNC machines, automation, aerospace |
| Delivery | Standard models 2–4 weeks |
Precision Bearings — Key Specifications
| Precision bearings | Specification |
|---|---|
| Precision grades | P5 / P4 / P2 (ABEC-5 / 7 / 9 equivalents) |
| Angular contact ball | 718 / 719 / 70 / 72 series; 15° and 25° contact angle; bore 35–280 mm; DB/DF/DT universal ground |
| Crossed roller | CRBT / CRBH / RA / RB / RE / RU; bore 10–800 mm |
| Cylindrical roller | NN / NNU / N; bore 25–500 mm; spindle floating end |
| Thrust ball | 511 / 512 / 513 / 514 / 532 / 533; bore 10–500 mm |
| Steel | GCr15 with dimensional stability treatment |
Company and Quality Facts
| Company facts | Detail |
|---|---|
| Certification | ISO 9001:2015 |
| Founded / facility | 2012 · 22,000 m² in Luoyang, Henan (2000 m² R&D + 20,000 m² manufacturing) |
| Team | 60+ employees incl. 10 senior engineers |
| Track record | 5,000+ units delivered in 2025 · 37 long-term clients in 10+ countries · 99.5% acceptance rate |
| Response / support | 24-hour response · pre-shipment inspection video · dedicated order tracker |
Frequently Asked Questions
Can I source all four component types from one supplier?
Yes. Songju manufactures electric spindles, linear guideways, ball screws, and precision bearings in-house at the same 22,000 m2 facility, so a machine rebuild can be quoted as one PO with one inspection standard and one shipment.
Do you offer OEM or custom versions of these specifications?
Yes - OEM and ODM orders are accepted on all four lines. Standard configurations ship in 2-4 weeks; custom spindles, special rail lengths, non-standard end journals on screws, and matched bearing sets are quoted within 24 hours of receiving drawings.
How do I verify the specifications on delivery?
Every shipment includes an inspection report, and a pre-shipment inspection video is provided on request before goods leave the factory. Bearing orders additionally carry grade and preload labeling on matched sets.
Which documents do you need for a quote against this spec sheet?
For spindles: power, speed, tool interface, and duty cycle. For guideways and screws: sizes, lengths, grades, and quantities. For bearings: designation, contact angle, precision grade, and arrangement. Send any part of this to [email protected] for a same-week quotation.