Engine reconditioning machine

Berco ACZ-71

AC 710 industrial cylinder boring and surfacing machine
Production era: 1970s–1980s industrial design

This is a high-precision engine block cylinder boring and surfacing machine, developed primarily for the reconditioning and oversize boring of internal combustion engine cylinders. The machine belongs to Berco's classic industrial series of engine rebuilding equipment, featuring a massive cast-iron frame and a high-rigidity spindle system.
The equipment is suitable for the precise boring of engine blocks, cylinder liners, and industrial cylinders. The stable T-slotted table and long stroke length allow for the machining of large engine blocks. The machine features a mechanical, multi-speed spindle drive and a precision feed system, ensuring uniform bore quality.
Key technical specifications:
• Minimum boring diameter: approx. 31 mm
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• Maximum boring diameter: approx. 180 mm
• Spindle speed range: approx. 155 – 873 rpm (multi-stage)
• Feed rates: approx. 0.04 – 0.076 – 0.128 mm/rev
• Main motor power: approx. 1 HP
• Table longitudinal travel: approx. 1000 mm
• Table cross travel: approx. 100 mm
• Effective table size: approx. 1100 × 400 mm
• Head vertical travel: approx. 700 mm
• Maximum boring depth: approx. 480 mm
• Maximum working height on the table: approx. 820 mm
• Distance from spindle centerline to column: approx. 305 mm
• Machine weight: approx. 1500 kg
• Stable cast-iron machine frame and precision guideways

The machine has been thoroughly cleaned, checked and adjusted;ready to work.