Deep Drilling Machines

1. Deep drilling machines introduction : 

The deep drilling machines has functions of solid drilling, rough boring , fine boring , trepanning , burnishing , add the servo tool expansion system , the deep drilling machines can be used to process the irregular shaped hole as well .

 

2. Deep drilling machines sketch : 

2. Deep drilling machines Overview

2.1 Machining Range of the deep drilling machines :

Drilling Range: Ø30 – Ø100mm

Boring Range: Ø40 – Ø360mm

Trepanning (Hole Saving) Range: Ø80 – Ø160mm

Workpiece Outer Diameter Range: Ø90 – Ø500mm

 

2.2 Deep drilling machines Functions: Drilling, Boring, Trepanning, and Cavity Hole Machining

2.2.1 Drilling: Utilizes the BTA (Boring and Trepanning Association) drilling method. Cutting oil is fed through the oil feeder, passes through the gap between the tool holder and the hole wall to the tool, and carries chips out through the inner bore of the tool holder.

 

2.2.2 Boring: Cutting oil is fed through the oil feeder and the gap to the tool, carrying chips out through the bottom of the workpiece bore. The tool moves towards the headstock during machining.

 

2.2.3 Trepanning (Hole Saving): External oil feed, internal chip removal. Coolant is supplied through the oil feeder and chips are evacuated through the inner bore of the tool holder.

 

2.2.4 Cavity Hole Machining: For complex internal cavities, the CNC system controls synchronized X-axis (tool expansion/contraction) and Z-axis movements. The tool retracts in the Z-direction while the cutter head moves radially (X-direction), guided by the pilot bore, to machine the cavity profile. Cutting oil is fed through the oil feeder for cooling and lubrication, with chips flushed forward into the chip chute.

 

2.3 Deep drilling machines Working Principle & Main Structure

Operation: The workpiece is rotated by the headstock and supported by the oil feeder. The drilling unit, carrying the tool, performs the linear feed motion.

 

Main Components of deep drilling machines : Bed, Headstock, Oil Feeder, Tool Holder Support, Drilling Unit, Slideways, Gear & Rack System, Cooling System, Control System, Electrical Cabinet, Workpiece Support Rest, etc.

 

Workpiece Clamping: One end is held by a manual 3-jaw chuck on the headstock; the other end is automatically centered and supported by the servo-controlled cone on the oil feeder.

 

Control System of deep drilling machines : SIEMENS 828D CNC system. 

 

X-axis: Tool expansion/contraction via a servo motor and ball screw.

Z-axis: Longitudinal feed of the drilling unit via a servo motor and dual-gear/rack system.

W-axis: Servo-driven movement and clamping force of the oil feeder via a servo motor and ball screw.

 

Key Structural Features of deep drilling machines :

Bed & Base Parts of deep drilling machines : Made from high-quality cast iron (resin sand molding), stress-relieved twice for stability, high rigidity, and minimal deformation under heavy loads. Features double rectangular hardened & ground slideways and an internal hardened helical rack for powerful, smooth feed.

 

Headstock of deep drilling machines : Drives workpiece rotation. 3 manual speed ranges with stepless adjustment within each range, powered by a 37KW servo spindle motor. Equipped with a manual Φ500mm 3-jaw chuck.

 

Oil Feeder of deep drilling machines : Provides tool guidance, cutting oil supply, and tool holder support. Features servo-driven axial movement (W-axis) for automatic workpiece positioning/clamping. High-rigidity integrated design with external rotary seal for easy maintenance.

 

Drilling box of deep drilling machines : Drives tool rotation. Mounted on the feed saddle. 3 manual speed ranges with stepless adjustment, powered by a 37KW motor. Equipped with a chip discharge chute.

 

Drill bar support rest of deep drilling machines : Provides intermediate support for long tool holders, absorbing vibrations. Features an automatic engage/disengage mechanism.

 

Dee drilling machines cooling System: High-pressure, high-flow system with a ~5500L ground tank, providing sufficient cutting oil (up to 2.5MPa, 600L/min) for deep hole operations. Equipped with pressure, level, and temperature monitoring.

 

Deep drilling machines lubrication System: Comprehensive automatic and manual lubrication for slideways, gears, and bearings, with low-level alarms.

 

3. Main Technical Parameters of Deep drilling machines :

Work Range：

Drilling Range: Φ30 – Φ100mm

Boring Range: Φ40 – Φ360mm

Trepanning Range: Φ80 – Φ160mm

Max. Machining Depth: 6000mm

Workpiece Outer Diameter: Φ90 – Φ500mm

Workpiece Length: 500 – 6000mm

Machine Performance

Z-axis (Drill box Feed):

Feed Rate Range: 5 – 1000 mm/min

Rapid Traverse: 2000 mm/min

Servo Motor: 20 Nm / 3.1 KW

Max. Thrust: 60 KN

W-axis (Oil Feeder):

Rapid Traverse: 2000 mm/min

Servo Motor: 20 Nm / 3.1 KW

Max. Clamping Force: 60 KN

X-axis (Tool Expansion):

Servo Motor: 6 Nm / 1.5 KW

Drilling box :

Spindle Speed: 30 – 1000 rpm

Motor Power: 37 KW (Standard)

Speed Control: 3 Manual Ranges, Stepless within range

Spindle Taper: Metric 85, Taper 1:20

Headstock:

Spindle Speed: 30 – 1000 rpm

Motor Power: 37 KW (Servo Spindle Motor)

Speed Control: 3 Manual Ranges, Stepless within range

Spindle Taper: Metric 85, Taper 1:20

Chuck: Φ500mm Manual 3-Jaw

Other Specifications of deep drilling machines:

Total Power: 112 KW

Max. Workpiece Weight: 3 Tons

Slideway Width: 600mm

Floor Space: 18.5m (L) × 3.3m (W)

Spindle Center Height: 500mm

Max. Tool Holder Pass-through in Oil Feeder: Φ220mm

Cooling System:

Max. Pressure: 2.5 MPa

Max. Flow: 600 L/min

Tank Capacity: Approx. 5500 L

 

4. Key Component Configuration List of deep drilling machines :

Control System: SIEMENS

X, Z-axis Servo Motors: SIEMENS

Headstock & Drilling box Main Motors: MK (Sichuan, China)

Cooling Pump: High-quality China brand

Main Electrical Components: Schneider or SIEMENS

Spindle Bearings: HRB/ZWZ/LYC ( leading Chinese brands)

Rack: YYC (Taiwan)

Headstock Chuck: Chinese brand 

 

5. Standard Deep Drilling Machines Package
The machine includes: 1x Bed, 1x Drilling Unit, 1x Headstock, 1x Chuck, 2x Workpiece Supports, 1x Oil Feeder, 1x Cooling System, 1x Feed Saddle, 1x Lubrication System, 1x Control System (SIEMENS 828D), 1x Electrical Cabinet (with A/C), 1x Set of Manuals, and 2x Tool Holder Supports.

 

6. Optional Accessories of deep drilling machines 
Available options include: Cutting Tools, Tool Holders, Accessories, Guide Bushings, Custom Cones for workpiece diameter, Cutting Oil (~3900L), Oil Chiller (12KW cooling capacity), Drum-type Paper Filter (50µm), and a Chip Conveyor (500mm width).

 

7. Machining Accuracy of deep drilling machines 

Rough Boring / Drilling / Trepanning: Hole tolerance IT9-11, Surface finish Ra 6.3-12.5µm, Straightness ≤ 0.4mm/1000mm.

Finish Boring: Hole tolerance IT8-9, Surface finish Ra 1.6-3.2µm, Straightness ≤ 0.10mm/1000mm.

 

Welcome to contact us by :

Email: grace@dzguanlu.com
Whatsapp/wechat:+86 15153489972
Name : Grace Lee

 

 

 

 

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