External cylindrical grinding machine CGX

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Overview
The CGX is a compact cylindrical grinding machine designed to combine a small floor footprint with large-part capacity. It occupies up to 30% less floor space than conventional moving‑table solutions while accommodating parts up to 1,800 mm length, Ø540 mm diameter and 500 kg weight.

Key features

• Three‑wheel configuration (2x OD, 1x ID) enabling OD, ID, thread and complex non‑round grinding
• Compact footprint with high workpiece capacity
• Optional integrated MDM gauge for pre‑, in‑ and post‑process measurement

Highlights

• Max. part length: 1,800 mm
• Max. part diameter: Ø540 mm
• Max. part weight between centers: 500 kg

Measurement capability (optional)
The CGX can be fitted with an in‑house MDM gauge to perform pre‑process, in‑process and post‑process measurements without interrupting production. Measurement range: 5–125 mm; suitable for interrupted or continuously varying surfaces. Typical performance: accuracy ±1.5 μm; repeatability 1 μm.

Technology

• Natural granite bed: high damping, excellent thermal stability and integrated coolant routing for bed and grinding area
• Swiveling B‑axis: torque‑motor driven, zero backlash and high‑resolution rotary encoder for excellent angular repeatability (example: ±1 μm at 650 mm radius)
• Linear motors: reduced wear components, faster acceleration and higher repeatability
• Grinding spindle heads: mounted on ultra‑precision bearings (hydrostatic optional) with lifetime lubrication; driven by integrated electro‑spindles

Software

• DoGrind+ platform with embedded expert features
• GrindIQ — intelligent process setup: defines optimal grinding parameters from basic component data
• GrindTune — adaptive in‑process optimisation: continuously adjusts parameters to improve surface quality, dimensional accuracy and cycle time

Technical data (metric)
Max. distance between centers — 1,800 mm
Max. diameter to be ground — 540 mm
Max. weight between centers — 500 kg
Max. grinding wheel diameter — Ø508 x 80 mm
Max. wheel peripheral speed — 80 m/s
External grinding spindle power — 15 kW

Technical data (imperial)
Max. distance between centers — 70.9 in
Max. diameter to be ground — 21.2 in
Max. weight between centers — 1,102 lb
Max. grinding wheel diameter — Ø20 x 3.14 in
Max. wheel peripheral speed — 15,750 sfpm
External grinding spindle power — 20.1 hp

Applications & capacity
The CGX is intended for grinding large and heavy components where floor space is constrained. It supports OD/ID grinding, thread grinding and complex geometries and can be integrated with in‑process measurement for high‑volume or high‑precision production.

Technical specifications

• Model name: CGX
• Max. distance between centres: 1,800 mm (70.9 in)
• Max. diameter to be ground: 540 mm (21.2 in)
• Max. weight between centres: 500 kg (1,102 lb)
• Max. grinding wheel diameter: Ø508 x 80 mm (Ø20 x 3.14 in)
• Max. wheel peripheral speed: 80 m/s (15,750 sfpm)
• External grinding spindle: 15 kW (20.1 hp)
• Workhead configuration: 2x OD wheels + 1x ID wheel (three‑wheel configuration)
• Bed material: natural granite with integrated coolant routing
• B‑axis: high‑resolution swiveling B‑axis, torque motor driven, zero backlash
• Motion axes: linear motors for high acceleration and repeatability
• Optional measuring system: integrated MDM gauge (5–125 mm), accuracy ±1.5 μm, repeatability 1 μm
• Software: DoGrind+ with GrindIQ and GrindTune