Precision CNC Machining for Cold Rolling & Slitting Equipment
Sharper Edges, Smoother Surfaces — Precision Components for Cold Rolling & Slitting
Cold rolling and slitting processes require components with extreme precision, wear resistance, and alignment stability to produce high-quality steel sheets and strips. From mandrels and knife holders to tension rollers and bearing housings, every part must deliver accuracy and durability.
With over 20 years of expertise, our CNC manufacturing supports OEMs and system integrators in producing key components that withstand high-speed, high-load operations in demanding environments.
✔ Challenges in Cold Rolling & Slitting Components
- Micron-level dimensional control: Mandrels and rollers with tolerances within ±0.005mm to ensure strip flatness.
- Wear-resistant surface finishing: Hard chrome plating, nitriding, or induction hardening for sliding and cutting components.
- Dynamic balancing for high-speed shafts: Minimizing vibration for shafts rotating up to 8,000 RPM.
- Precise groove machining: For strip guiding and tension rollers with groove depth accuracy better than ±0.01mm.
- Complex assembly interfaces: Knife holder assemblies require precise bore and thread tolerances for quick blade replacement.
✔ Key Components We Machine
| Component | Application | Processing Features |
|---|---|---|
| Mandrels & Shafts | Coil feeding, rolling | Ground & balanced shafts, keyway & spline machining |
| Slitting Knife Holders | Steel strip slitting | Precision milled and drilled, hardening support |
| Tension Rollers & Guides | Strip leveling lines | CNC-turned, groove cutting, surface polishing |
| Bearing Housings & Flanges | Rolling mill drives | Bored & milled flat, fitted to ISO bearing standards |
| Knife Clamping Mechanisms | Automatic blade change | Threaded bores, surface hardening, precision fits |
| Drive Gears & Couplings | Transmission assemblies | Gear grinding & finishing, concentricity control |
✔ Materials and Surface Treatments
| Material | Typical Use | Surface Treatment |
|---|---|---|
| 42CrMo / 40Cr | Shafts, mandrels | Induction hardened (HRC 55-60), ground finish |
| Tool Steels (D2, Cr12MoV) | Slitting knives, holders | Vacuum hardened, precision ground & lapped |
| SUS304 / SUS316 | Bearings & housings | Polished, passivated for corrosion resistance |
| Aluminum Alloys (6061, 7075) | Lightweight support frames | Anodized & milled |
| Cast Iron (HT200, FC250) | Bases & mounts | Vibration-damped & machined |
✔ Advanced Equipment & Inspection
- 5-axis CNC milling centers for complex knife holders and mounting blocks
- Precision cylindrical grinding machines for shafts & rollers
- Dynamic balancing machines for rotors and mandrels
- Surface grinding and polishing stations for wear resistance
- CMM, roundness, and surface roughness measurement instruments
✔ Global Reference Projects
- ✅ Mandrel shafts for Korean cold rolling mill (Ø150mm, length 1200mm, tolerance ±0.003mm)
- ✅ Precision slitting knife holders for German strip processing OEM
- ✅ Tension rollers with V-groove for U.S. automotive steel supplier
- ✅ Bearing housings for Japanese high-speed cold mill drives
✔ Why OEMs Choose Us
- Comprehensive machining + heat treatment + finishing solutions
- Strict quality controls aligned with ISO 9001 and IATF 16949 standards
- Long-term partnerships with top steel processing equipment manufacturers
- Quick turnaround for prototypes and serial production
- End-to-end project support from design consultation to delivery
🔧 Precision Components That Keep Steel Rolling Smoothly
Every millimeter counts in cold rolling and slitting. Our high-precision CNC machining delivers parts that boost your process stability and product quality.
📩 Share your technical drawings — we’ll provide expert advice and detailed quotations within 24 hours.