CNC Boring Machine

CNC Boring Machine for Precision Bore Machining

A CNC boring machine engineered for precision line boring, facing, and milling of large workpieces where bore concentricity, cylindricity, and surface finish are critical. Designed for machinery importers, distributors, and EPC buyers who require documented bore quality and consistent dimensional accuracy across production runs.

What This Machine Does

The CNC boring machine enlarges and refines existing holes in castings, fabrications, and assembled components to achieve precise bore diameters, surface finishes, and geometric tolerances. Unlike drilling, which creates new holes, boring improves existing holes to tighter tolerances and better surface quality. This makes it essential for engine blocks, gearbox housings, pump bodies, hydraulic cylinders, and structural fabrications where bore alignment and roundness directly affect equipment performance.

Specification Overview

Parameter	Typical Range
Spindle diameter	90-130 mm
Max boring diameter	250-500 mm
Boring depth	Up to 1,000 mm
Spindle speed range	20-1,000 rpm (variable)
Spindle motor power	15-30 kW
X/Y/Z travel	1,600 / 1,250 / 1,000 mm
Table load capacity	Up to 4,000 kg
Bore tolerance	IT6-IT7 (typical)
Surface roughness (Ra)	0.8-1.6 µm
Controller	FANUC / Siemens

Note: Exact specifications vary by configuration. Confirm specific bore diameter, depth, and tolerance requirements during inquiry.

Key Features

• Heavy cast iron structure: Provides vibration damping and thermal stability for consistent bore accuracy during long cuts
• Precision spindle: Hydraulically preloaded spindle bearing system maintains runout accuracy under heavy cuts
• CNC contour control: Multi-axis interpolation enables tapered boring, internal profiling, and back-facing operations in a single setup
• Tool condition monitoring: Real-time cutting force and vibration monitoring detects tool wear and prevents bore drift
• Automatic tool change: Tool magazine with programmable selection reduces setup time between bore sizes

Why Bore Quality Matters

In rotating equipment, hydraulic systems, and power transmission applications, bore quality directly determines equipment reliability. Poor concentricity causes vibration and premature bearing wear. Inconsistent cylindricity leads to seal leakage and uneven load distribution. For export orders, end-users and EPC contractors increasingly require documented bore inspection data -- not just a finished dimension, but roundness, cylindricity, and surface finish measurements that prove the bore meets functional requirements. This CNC boring machine produces bores with traceable dimensional data that satisfies buyer acceptance criteria.

Applications

• Engine cylinder block bores and liner seats
• Gearbox and transmission housing bores
• Pump body and volute bores
• Hydraulic cylinder bore finishing
• Bearing housing bores in fabricated structures
• Large flange and pipe connection bores
• Turbine casing bores

Company Backing

Manufactured and quality-controlled within Zhuhai ChunTian Machine Technology's IATF 16949:2016-certified facility. Every project follows a structured pre-production workflow: drawing review, tolerance risk assessment, sample gate approvals, and FAT records. Inspection packages include bore measurement reports, roundness charts, and shipment photo packs.cks.