CNC Turning Centers
YBK25II / YBK35II / PM25 / PM35 CNC Turning Centers
Compact CNC turning centers for small precision components, available with Ø25 mm or Ø35 mm maximum bar capacity. YBK models use variable-frequency spindle motors; PM models use servo spindle motors. All four models feature Taiwan Syntec CNC, a precision spindle and 15 m/min X/Z rapid traverse.
- MOQ: 1 set
- Brand: SIPENG CNC — Tianjin, China
- Configuration: Tooling / bar feeder / parts collection / automation
- Quotation: reply within 24 hours
Specifications
| Models | YBK25II / YBK35II / PM25 / PM35 |
|---|---|
| Maximum swing over bed | YBK25II / YBK35II: Ø330 mm; PM25 / PM35: Ø300 mm |
| Maximum swing over cross slide | YBK25II / YBK35II: Ø120 mm; PM25 / PM35: Ø130 mm |
| Maximum bar stock diameter | YBK25II / PM25: Ø25 mm; YBK35II / PM35: Ø35 mm |
| Main spindle through-hole diameter | YBK25II / PM25: Ø26 mm; YBK35II / PM35: Ø36 mm |
| Maximum machining length | 100 mm, all models |
| Main spindle motor | YBK25II: 2.2 kW (VFD); YBK35II: 3.0 kW (VFD); PM25 / PM35: 3.7 kW (servo) |
| Maximum spindle speed | YBK25II / YBK35II: 3,500 rpm; PM25 / PM35: 5,000 rpm |
| Main spindle runout | ≤0.002 mm, all models |
| Spindle center height | 1,050 mm, all models |
| Maximum drilling diameter | Ø10 mm, all models |
| Maximum tapping size | YBK25II / PM25: M8; YBK35II / PM35: M10 |
| Turning tool holder size | □16 mm, all models |
| Maximum boring bar diameter | Ø25 mm, all models |
| X-axis travel | YBK25II / YBK35II: 220 mm; PM25 / PM35: 300 mm |
| Z-axis travel | YBK25II / YBK35II: 180 mm; PM25 / PM35: 200 mm |
| X / Z rapid traverse | 15 m/min, all models |
| X-axis motor torque | 3.5 N·m, all models |
| Z-axis motor torque | 3.5 N·m, all models |
| Repeat positioning accuracy | ≤0.003 mm, all models |
| CNC control | Taiwan Syntec, all models |
| Spindle motor type | YBK25II / YBK35II: variable-frequency drive; PM25 / PM35: servo |
| Machine weight | YBK25II: 850 kg; YBK35II: 900 kg; PM25: 1,050 kg; PM35: 1,080 kg |
| Overall dimensions (L × W × H) | YBK25II / YBK35II: 1,390 × 1,080 × 1,650 mm; PM25 / PM35: 1,550 × 1,250 × 1,780 mm |
Product Details
Product Overview
The YBK25II, YBK35II, PM25 and PM35 are compact CNC turning centers for machining small, precise components. YBK25II / PM25 support bar stock up to Ø25 mm, while YBK35II / PM35 support up to Ø35 mm.
Key Features
- Taiwan Syntec CNC control on all four models.
- Imported angular-contact spindle bearings in a three-front / two-rear arrangement; specified spindle runout is ≤0.002 mm.
- Meehanite cast-iron bed and slides provide a rigid machining structure.
- Dovetail tool-post layout supports quick and accurate tool changes.
- Servo-driven feed axes with Taiwan precision ball screws and linear guides.
- Central Z-axis drive and automatic lubrication support stable axis operation.
- Optional bar feeder or custom automatic loading/unloading robot is available.
Model Selection
Choose YBK25II / PM25 for Ø25 mm maximum bar capacity or YBK35II / PM35 for Ø35 mm. YBK models use variable-frequency spindle motors; PM models use servo spindle motors. Spindle speed, motor power, axis travel and machine dimensions vary by model.
Applications
Suitable for small precision components used in communications, electronics, automotive, pneumatic and hydraulic equipment, medical devices, instrumentation and aerospace applications. Confirm suitability against the part drawing, material, tolerances and production requirements.
Interested in this product?
Send your requirement and quantity — we reply with price, lead time and technical advice within 24 hours.
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Frequently Asked Questions
I can provide drawings, material and blank specifications. Can you recommend the right machine and machining route?
Yes — that is exactly how we start. Send the drawing (PDF, DWG or STEP), material grade, blank dimensions, key tolerances and your target output. Our engineers review the part geometry and process, then recommend a machine model, fixture concept and machining route, together with an estimated cycle time. We reply with a written evaluation and quotation within 24 hours.
Can my part be completed in one setup? Which operations would need other equipment?
It depends on geometry, size and accuracy, so we answer this per part, not in general. After reviewing your drawing we reply in writing: which operations are completed in one clamping, which need a second operation or a different machine, and what the recommended process chain looks like. If a part genuinely needs two setups, we say so instead of promising one-setup results.
Are cutting tools, fixtures, bar feeder and CNC programs included?
They can all be included — the delivery scope is defined line by line in our quotation. A typical turnkey package covers the machine, fixtures designed for your parts, the tooling package, bar feeder integration and CAM programs for your parts, plus a recommended consumables list. If you prefer machine only, or want to keep your existing tooling, the scope is adjusted and every included and excluded item is listed before you sign.
How do you evaluate the machining time for my parts?
We build the process route first, then calculate cycle time from tool paths and cutting data, and cross-check it with CAM simulation. The estimated time per part is stated in the proposal. During trial cutting the actual cycle time is measured; the measured result — not the paper estimate — is the basis for acceptance, so the number you plan production around is a verified one.
Can you run trial cutting with my own material?
Yes, and we recommend it. You send material or blanks; after the machine, fixtures and programs are ready we machine your parts, record cutting parameters, cycle time and tool behaviour, and provide a trial report with measurement results, photos and video. The trial schedule is agreed with you in advance, so you can attend in person or follow it remotely.