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BTA Introduction

BTA deep hole drilling/boring machine is the special equipment for drilling deep cylindrical hole. With rectangle guideway after hardening for heavy load and with guiding. The machine can do solid drilling, trepanning, counterboring, roller-burnishing, to work out through hole, step-hole and blind hole.

BTA deep hole boring machine is widely used in machine building, locomotive, hydraulic cylinder, oil & gas machinery, power generator industry, firearm industry, ship building, mining machinery, aerospace industry, etc.

HTT BTA high rigidity and high accuracy and high efficiency.

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BTA Technology

Ⅰ. BTA Deep Hole Drilling Technology

1.workpiece rotates, tool rotates and feed

2.workpiece rotates, tool feed

3.workpiece stationary, tool rotates and feed

Which kind of technology we use depends on the feature of workpiece and the demand of technology.

1.BTA 2.forward chip removal (adapted to manufacture of hollow material) 3.trepanning

Ⅱ. Accuracy and Efficiency

Deep hole boring machining accuracy and efficiency

◆Machining accuracy:
Drilling	diameter accuracy IT9-10	Surface roughness	Ra6.3-12.5
Nesting	diameter accuracy IT9-10	Surface roughness	Ra6.3-12.5
Rough boring	diameter accuracy IT9-10	Surface roughness	Ra3.2-6.3
The fine boring	diameter accuracy IT8-9	Surface roughness	Ra1.6-3.2
Rolling	diameter accuracy IT8-9	Surface roughness	Ra0.2-0.4
Processing hole straightness	＜0.15/1000mm	Processing hole skew	＜0.5/1000mm
◆Machining processing efficiency:
Cutting speed: according to the tool structure, material and workpiece material general 20-120m/min
Feed rate: determined according to the processing conditions general 10-400mm/min

Parameters

Model	KT50	KT100	KT200	KT350	KT500
Drilling capacity (mm)	Ф16-Ф50	Ф20-Ф80	Ф40-Ф80	Ф40-Ф80	Ф40-Ф120
Boring capacity (mm)	Ф20-Ф50	Ф25-Ф100	Ф40-Ф200	Ф40-Ф350	Ф40-Ф500
Distance from linearguide to spindle center (mm)	250	400	400	500	680
Feed speed (mm/min)	0-500	0-500	0-500	0-500	0-500
Rapid feed speed (m/min)	5	2	2	2	2
Max. spindle speed (rpm)	1200	1000	1000	670	315
Spindle power (kW)	15	11	30	30	37
Max. workpiece spindle speed (rpm)	50	60-1000 (Grade 12)	60-1000 (Grade 12)	42-670 (Grade 12)	3.15-315 (Grade 21)
Workpiece spindle power (kW)	3	30	30	30	37
Workpiece outside diameter (mm)	50-200	50-200	50-200	50-400	50-630
Max. coolant flow (L/min)	250	250	400	600	1000
Max. coolant pressure (bar)	50	50	50	50	50

Application

BTA deep hole drilling and boring machine application: petroleum industry, extrusion screw industry, hydraulic steel tube industry, military industry, aerospace industry.

Drilling range: φ16-150mm

Max. drilling depth: 10,000mm

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