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Comec AC170 Cylinder Boring Machine

  • Model: AC170
  • New Machine; Call for Pricing

The Comec AC170 is a versatile, vertical cylinder-boring machine designed for engine-block reconditioning — capable of machining cylinder bores for both car and truck engines. It covers a wide bore range (35–170 mm), making it suited for small to medium-sized engines, and offers a strong balance of precision, flexibility, and ease of use. With its robust construction, adjustable spindle speed, and quick centering system, the AC170 delivers accurate, high-quality boring — ideal for shops that rebuild or re-machine engine blocks in-house.

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Key Features

  • Wide Bore Range — Supports cylinder bores from 35 mm up to 170 mm, covering most passenger-car and light to medium-duty truck engines.
  • Adjustable Spindle & Feed — Spindle speed is variable (50–700 rpm or 75–700 rpm depending on literature) for optimized cutting, and spindle feed can be controlled for different materials and finish requirements.
  • Large Travel & Worktable Capacity — Head vertical travel up to 670 mm and a table surface of 1040 × 370 mm, with table travel up to 1000 mm longitudinally — good for a variety of block sizes and layouts.
  • Precise Centering & Depth Control — Comes standard with a quick-centering system (probe on boring bar + dial indicator) and a depth-control device so you can set up cylinders quickly and consistently.
  • Compact Footprint for Shop Floors — Overall machine size is reasonable (≈ 1030 × 1020 × 2000 mm), making it suitable even for moderate-sized shops.
  • Complete Standard Package — Adjustable spindle/bar feed, tool-setting dial indicator, boring-depth gauge, supports, parallel blocks and standard tooling are included — so it’s ready to run basic boring jobs from day one.
SpecificationValue
Boring Range35 – 170 mm (≈ 1.38″ – 6.69″)
Max Vertical Head Travel670 mm
Max Head-to-Table Distance940 mm
Spindle-to-Column Center Distance290 mm
Spindle Rotation Speed50 – 700 rpm (variable)
Spindle Feed Rate0 – 175 mm/min
Table Surface1040 × 370 mm
Table Longitudinal Travel1000 mm
Table Transverse Travel200 mm
Spindle Motor Power1.5 kW
Rapid Head-Feed Motor Power0.37 kW
Machine Footprint (L×W×H)≈ 1030 × 1020 × 2000 mm
Net Machine Weight≈ 1,150 kg

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  • How We Work

How We Deliver Precision, Reliability & Support

We make equipment decisions easy. Clear answers, accurate recommendations, and support from people who know the industry.

01

Fast, Expert Response

When you reach out, you get answers quickly - not generic replies.

02

Precision Recommendations Built on Experience

Backed by 50+ years in engine machining and reconditioning.

03

Smooth Purchasing & Transparent Communication

No surprises, no unclear timelines.

04

Delivery, Setup & Ongoing Support

Your machine’s long-term performance is our priority.

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Built on Real Engine-Rebuilding Experience

Decades before today’s engine shops trusted our equipment, Tony was already deep in the craft — rebuilding motors, machining blocks, and pushing for better precision.

A local newspaper once featured him as a standout young machinist, noting his drive, attention to detail, and obsession with doing things the right way. That same passion would eventually shape our company’s values.

Today, that commitment lives on in every machine we sell, every customer we support, and every shop we help succeed.