Thread rolling machine R7NC

CNC

Product Overview
The R7NC is a compact in‑feed type CNC thread rolling machine engineered for stable, high‑output formation of burr‑free threads on short workpieces. It rolls external diameters up to φ45 mm with a maximum rolling length of 60 mm and delivers up to 7 t rolling pressure. The unit is suitable for hard-to-form materials including alloy steel, stainless steel and titanium and is optimized for short, high‑precision thread production in small‑batch or production‑line environments.

Key Features

• In‑feed configuration optimized for short workpieces and high positional accuracy.
• Rolling capacity: up to φ45 mm O.D. and 60 mm rolling length.
• Maximum rolling pressure: 7 t for consistent cold forming on demanding materials.
• Supports internal, external and through‑feed rolling techniques.
• Compact footprint and rigid frame to reduce vibration and improve surface finish.
• CNC control and digital feedback for repeatable rolling depth and positioning.

Recommended Configurations

• Matched roll die sets for standard and custom thread profiles (e.g., M8, M10, UNF).
• Adjustable guide rails and clamping fixtures to ensure concentricity during rolling.
• Cooling and lubrication (mist or flood) to extend die life and limit thermal deformation.
• Digital position sensors for closed‑loop rolling depth control.
• Anti‑burr edge finisher or roll‑face dressing to ensure clean entry/exit profiles.
• Automatic loading/unloading arm for increased throughput in mass production.

Applications and Case Study

• Client example: automotive shaft manufacturer requiring burr‑free external threads on drive shafts.
• Use case: high‑precision external thread rolling on short cylindrical components.
• Typical setup: R7NC with custom roll dies, guide rails and mist lubrication.
• Example results: achieved thread tolerance Class 6g with no chipping; die set life ~20,000 cycles; surface finish Ra ≤ 1.2 μm; improved fatigue resistance and throughput versus cutting methods.

Thread Types & Materials

• Supported thread types: metric, inch (UN/UNF), trapezoidal, splines, knurling and custom straight/diagonal patterns.
• Suitable materials: mild steel, carbon/alloy steel, stainless steel, copper, aluminium and titanium alloys with adequate cold‑forming properties.

Caractéristiques / spécifications techniques

• Model: R7NC
• Max. rolling O.D.: φ45 mm
• Max. rolling length: 60 mm
• Max. rolling pressure: 7 t
• Compatible rolling techniques: internal, external, through‑feed
• Recommended accessories: matched roll die sets, adjustable guide rail, cooling/lubrication system, digital position sensor, anti‑burr finisher, automatic loading arm
• Example achieved metrics: thread tolerance Class 6g; die set life ~20,000 cycles; surface finish Ra ≤ 1.2 μm