Appearance
A BTA machine needs 3–5× the floor space of a conventional CNC lathe — the coolant system alone occupies 40–60 m². Poor layout increases material handling by 20–40% and creates safety hazards. Plan the facility before the machine arrives.
Space Requirements by Machine Type
| Machine Type | Machine Footprint | Coolant & Filtration | Total Area Required |
|---|---|---|---|
| Gun drilling (2 m capacity) | 10–20 m² | 15–30 m² | 50–80 m² |
| Gun drilling (6 m capacity) | 20–40 m² | 25–50 m² | 80–150 m² |
| BTA (3 m capacity) | 25–50 m² | 40–60 m² | 100–200 m² |
| BTA (12 m capacity) | 60–120 m² | 50–100 m² | 200–400 m² |
These figures include operator access, maintenance clearances, and basic material staging. Add 20–30% for high-production cells with automated material handling.
Machine Positioning Guidelines
Crane Coverage and Aisle Width
- Position the machine spindle within the overhead crane coverage zone
- Minimum aisle width in front of the machine: 3 m for manual loading, 4.5 m for forklift loading
- Clearance behind the machine for coolant system access: 1.5 m minimum
- Clearance at the chip end: 2 m for chip conveyor access and maintenance
Foundation Requirements
| Machine Size | Foundation Depth | Reinforcement | Isolation |
|---|---|---|---|
| Up to 3 m capacity | 300–500 mm | Light mesh | Rubber pads |
| 3–6 m capacity | 500–800 mm | Rebar grid | Spring isolators |
| 6 m+ capacity | 800–1,200 mm | Engineered foundation | Inertia block + isolators |
Coolant System Layout
Warning: Coolant system placement is the most overlooked layout issue. The pump and filtration unit should be as close to the machine as possible — every metre of extra piping adds pressure drop and energy cost.
Optimal Coolant System Placement
- Maximum distance from machine to coolant tank: 10 m
- Return line slope: minimum 1:100 toward the tank
- Filtered coolant supply line: insulated to prevent condensation
- Chip conveyor discharge: direct to dumpster or external chip bin
Piping Considerations
- Supply line diameter: sized for flow velocity of 3–5 m/s
- Return line diameter: sized for gravity flow (larger than supply)
- Flexible connections at machine interface to isolate vibration
- Drain valves at low points for maintenance
Material Flow Planning
Workpiece Flow Paths
Design material flow to minimise workpiece travel distance:
- Raw material storage → staging area → machine loading → drilling → inspection → finished goods
- Keep the flow linear or U-shaped — avoid back-tracking
- Raw material staging: minimum 1 week of production volume
Bar Stock Handling
- Horizontal rack storage for long bar stock (dedicated racks with end stops)
- Bar stock feed table: 1.5× the longest workpiece length
- Loading area: clear space equal to 2× the longest workpiece length
Heavy Workpiece Considerations
For parts over 50 kg:
- Use a hoist or jib crane at the loading position
- Provide a dedicated staging table at machine height
- Plan for fixturing setup area adjacent to the machine
Chip Management
Deep hole drilling produces 80–95% of the removed material as chips. Chip volume is approximately 10× the finished hole volume.
| Material | Chip Type | Handling Requirement |
|---|---|---|
| Steel (low carbon) | Short, broken | Standard conveyor |
| Steel (alloy) | Long, stringy | Shredder or crusher recommended |
| Aluminium | Fine, flaky | Separate collection for recycling |
| Inconel | Hard, abrasive | Heavy-duty conveyor |
FAQ
How much space do I need for a deep hole drilling machine?
A medium BTA machine with coolant system requires 100–200 m² total. Plan for the machine footprint, coolant tank and filtration, material staging, operator access, and maintenance clearance.
Can I place the coolant system outdoors?
In temperate climates, yes — provided the tank is insulated and heated to prevent freezing. This saves indoor floor space but complicates maintenance in bad weather.
Should the machine be on a separate foundation?
For machines over 6 m capacity and all BTA machines, yes. A separate inertia block prevents vibration transmission to other equipment and ensures hole straightness.
How do I plan for future expansion?
Leave 20–30% additional space on one side of the machine for additional coolant capacity or a second machine. Design the coolant piping with future tie-in points.
What is the optimal material flow pattern?
A U-shaped flow (raw material in → machine → inspection → finished goods out) minimises travel distance and allows one operator to manage multiple stations.
Facility layout requirements vary by machine type, production volume, and existing building constraints. Engage a structural engineer for foundation design. This article reflects industry practice as of 2026.