Workpiece and bore
- Material, hardness and heat treatment
- Solid, pilot-hole or other starting condition
- Diameter, depth and L/D relationship
- Through, blind, stepped, angled or intersecting geometry
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Gun drilling and BTA process review
Deep Hole Drilling Machines Selected by Bore Geometry and Chip-Evacuation Method
Guanghe configures deep hole drilling equipment around material, hole diameter, depth-to-diameter relationship, entry condition, rotation, coolant and chip evacuation.
Reference ranges are selection aids. Final feasibility and performance require workpiece, tooling, process and inspection review.
Is Deep Hole Drilling the Right Starting Route?
Deep hole drilling is normally reviewed when a long bore must be created from solid material or an agreed starting condition. Gun drilling and BTA use different tool, coolant and chip-evacuation arrangements.
Good starting fit
- Long bores from solid material
- Controlled entry and tool guidance
- Workpieces that can be supported with the required coolant route
- Repeat production where process stability matters
Review another or combined route when
- The hole already exists and only final correction is required
- Stock removal is better handled by boring
- Blind, stepped, interrupted or cross-hole geometry changes chip evacuation
- Rigidity or coolant access cannot support the proposed method
Inputs That Change the Drilling Configuration
Machine and production
- Entry, exit, datum and position tolerance
- Tool, workpiece or combined rotation
- Coolant pressure, flow, filtration and chip handling
- Quantity, takt, loading and automation need
Current Reference Configuration Range
| Reference family | Current documented reference | Selection boundary |
|---|---|---|
| ZK2102/03 | Drilling reference Ø10–35 mm; reference depth up to 2,000 mm | Single-head reference family; do not treat it as a multi-station configuration. |
| ZK2102/03 page values | H8–H11 and Ra ≤ 1.6 μm are website references | Not an unconditional guarantee; bind values to material, tool, depth, coolant and inspection method. |
| BTA drilling solution | Process family confirmed; a complete standard envelope is not approved for this page | Diameter, depth, coolant and interface boundaries require engineering confirmation. |
Gun Drilling or BTA? Start with the Bore
Gun drilling is commonly evaluated for relatively small-diameter long bores with external chip evacuation. BTA is evaluated for suitable larger-bore applications using an internal chip-removal route. The changeover point is not determined by diameter alone.
Material, depth, output, coolant supply, tool interface and machine layout all affect the process choice.
From Bore Data to a Drilling Configuration
1. Classify the bore
Geometry, material and starting condition.
2. Select the principle
Tool, chip route, guidance and rotation.
3. Configure the machine
Supports, coolant, filtration, loading and automation.
4. Define acceptance
Test piece, measurement length, instrument and limits.
Evidence and Limits
PROCESS REFERENCE
Published machine-family information
Current website data supports a reference configuration and process route. Final values require a project-specific technical agreement.
RELATED ORDER EVIDENCE
Double-spindle order configuration
An anonymized buyer-confirmed record documents a double-spindle ZK2102 configuration. It proves the ordered configuration, not delivery or machining performance.
Review the evidence-bounded recordEngineering review
Review Your Deep Hole Drilling Application
Send the material, starting condition, diameter, depth, geometry, quality requirements, output target and drawing.
Deep Hole Drilling FAQ
What information is required for a drilling proposal?
Provide material, starting condition, diameter, depth, geometry, tolerance, coolant boundary, quantity and drawing.
Does gun drilling suit every long hole?
No. Diameter, material, entry condition, depth, interruption and chip evacuation must be reviewed.
Are the published accuracy values guaranteed?
No. They are selection references until confirmed in signed project documents with the measurement method.