Huizhou-based supplier of MOSIONX ball screws, HIWIN linear guides, ball splines and support units — stocking distributor with in-house shaft-end machining.
Huizhou Shiyi Automation Technology Co., Ltd. is located in Shiwan Town, Boluo County, Huizhou, Guangdong. We keep two ball screw production routes running in parallel: C5 precision-ground for positioning-critical axes, and C7 rolled for general automation where the cost per axis matters more than micron-level accuracy.
Alongside our own screw lines we act as a core channel partner for MOSIONX (the brand of Taiwan TBI Motion) and a service provider for HIWIN linear guides. Stocking both brands is deliberate: it lets a machine builder pair a MOSIONX screw with a HIWIN guide, or keep a single brand across a machine, without waiting on a consolidated shipment.
| Line | Common series | Typical use |
|---|---|---|
| Ball screws | SFA, SFB, SFV, SFAR, SFVR | CNC feed axes, laser cutting, Z-axis lifts |
| Linear guides | TRH / TRS series, HIWIN HG equivalents | Gantry beams, pick-and-place, gantry robots |
| Ball splines | SLF (flanged), SLT (cylindrical) | Torque plus linear motion on one shaft |
| Rotary series | Rotary ball screw / spline assemblies | Indexing heads, SCARA-style Z-R axes |
| Support units | BF, BK, EK, FK fixed and supported ends | Screw mounting, bearing housing |
| Couplings & modules | KP single-axis modules, shaft couplings | Compact linear axes, servo coupling |
Model naming follows the catalog. Cross-references such as SFNU05020-4 = SFU05020-4 = DFU05020-4 refer to the same screw; ask us to confirm before substituting.
Screw accuracy is specified as travel deviation over 300 mm of travel — not as a general "precision" claim:
| Grade | Deviation / 300 mm | Process | Fits |
|---|---|---|---|
| C3 | ≈ 0.008 mm | Ground | Semiconductor handling, metrology |
| C5 | ≈ 0.018 mm | Ground | Machining centres, laser processing |
| C7 | ≈ 0.050 mm | Rolled | General automation, lifting, feed |
| C10 | ≈ 0.210 mm | Rolled | Rough positioning, low-cost transport |
Machining and acceptance follow GB/T 17587.3 (ball screws — acceptance conditions) and GB/T 1800 (limits and fits); keyways to GB/T 1095 and retaining-ring grooves to GB/T 894. If your drawing cites ISO or JIS instead, send it — we work to the drawing.
One common mix-up: C0–C3 are ball screw accuracy codes. Linear guide accuracy is graded N / H / P / SP / UP. Do not carry screw grades across to guides.
Buying a screw on diameter alone is the usual cause of premature failure. Before we recommend a model we work through:
Bring those five numbers and the model selection takes minutes. Our online selector covers 431 catalogued records and runs the life and critical-speed checks directly.
Both, depending on the part. We run C5 ground and C7 rolled screw lines in Huizhou, and we stock MOSIONX and HIWIN product as a channel partner. Standard models ship from stock; special shafts are machined to drawing.
Two separate Taiwanese makers. MOSIONX is the brand of Taiwan TBI Motion; HIWIN is best known for linear guides. We supply both so a design is not locked to one catalogue.
Yes — stepped ends, keyways to GB/T 1095, ring grooves to GB/T 894, and custom nut flanges. Attach the drawing to your enquiry.
We can supply export-grade packing together with English drawings and dimensional reports. International freight is arranged by the buyer or their forwarder.