Manufacturing capability for long, controlled bores

Deep Hole Drilling for Long Precision Bores

Using the BTA method, Ø30–110 mm bores are drilled through solid steel in one pass up to 4 000 mm and come out honing-ready. Honing up to Ø300 × 2000 mm and hard chrome can follow.

One accountable teamCNC-Turkey manages international sales, engineering communication, production coordination, quality documentation and export operations. Manufacturing is carried out at partner workshops in Istanbul selected for their specialism; CNC-Turkey is responsible for quotation, quality and delivery.

New hollow shaft component with a long machined bore — Long-bore geometry and axis control

Bore diameter

Ø30–110 mm

BTA pass

one pass up to 4 000 mm

Follow-on processes

honing up to Ø300 × 2000 mm; hard chrome

deep hole drilling Turkey

BTA deep-hole drilling produces Ø30–110 mm bores through solid steel in one straight pass up to 4 000 mm, ready for honing. Where final size and surface require it, honing up to Ø300 × 2000 mm can follow, with hard chrome also available in the process route. Bore axis, drift, entry and exit conditions and material are reviewed for every drawing.

Send your drawing for a quote

Include PDF + STEP/STP, material, quantity, tolerances and destination.

No account needed · or by email: info@cnc-turkey.com

Video · 32 sec

How 4-metre deep-hole drilling works

Animation: BTA deep-hole drilling pumps coolant around the drill tube and returns chips through the centre — one straight pass up to 4 000 mm, honing-ready.

Coolant is pumped in around the drill tube.
Chips return through the tube centre.
One straight pass up to 4 000 mm through solid steel.
Bores Ø30–110 mm come out honing-ready.

Ø30–110 mm
4 000 mm up to
BTA
honing & hard chrome available

Send your drawing Watch on YouTube

Applications and manufacturing scope

✓New hydraulic bodies, long sleeves, hollow shafts and machine components
✓Single-ended or opposed drilling strategy selected from geometry
✓Controlled stock allowance for subsequent honing or grinding

Technical acceptance and order inputs

Bore axis, entry datum, permitted drift, bottom form and exit-burr requirement are defined explicitly.

✓Share the PDF drawing, STEP/STP, quantity and operating conditions.
✓Review L/D ratio, material, accuracy and tool access.
✓Prepare datum faces and drill with controlled intermediate checks.
✓Verify diameter, drift, position and surface condition where specified.

Manufacturing

What we coordinate for your drawing

•New hydraulic bodies, long sleeves, hollow shafts and machine components
•Single-ended or opposed drilling strategy selected from geometry
•Controlled stock allowance for subsequent honing or grinding

Project control

Clear technical responsibility for new component manufacturing

—The scope starts with manufacturing a new component from raw material or a semi-finished blank to an approved drawing.
—Bore axis, entry datum, permitted drift, bottom form and exit-burr requirement are defined explicitly.
—Drawing revision, process sequence and acceptance records are tracked through the order.
—Manufacturing, quality documentation and export delivery are managed as one CNC-Turkey project.

RFQ

From drawing review to export shipment

Share the PDF drawing, STEP/STP, quantity and operating conditions.

Review L/D ratio, material, accuracy and tool access.

Prepare datum faces and drill with controlled intermediate checks.

Verify diameter, drift, position and surface condition where specified.

Complete delivery with approved documentation and protective packing.

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FAQ

Questions international buyers ask

What is the difference between BTA drilling and gun drilling?

Gun drilling feeds coolant through the drill and evacuates chips along an external V-flute, typically for smaller diameters. BTA (STS) drilling pumps coolant around the drill tube and returns chips through the tube centre, which suits larger diameters and long bores. We drill BTA Ø30–110 mm up to 4 000 mm in one pass, honing-ready.

What information is needed for a deep bore?

Provide diameter/length, tolerance, axis datum, drift limit, through/blind-end geometry, material and final surface requirement.

Can every diameter be drilled to 4000 mm?

No. Even within approx. Ø30–110 mm, feasibility depends on L/D ratio, material, drift requirement and bore type.

Can the bore be honed after drilling?

Yes. When final diameter, tolerance, cylindricity and roughness are defined, drilling allowance can be planned for honing.

How is bore accuracy inspected?

The method follows bore size and acceptance criteria; diameter, position to datums and drift can be reported with suitable inspection methods.

Can turning be included with deep-hole drilling?

Yes. External-diameter datums, the entry face and bore axis of the new component can be prepared in one route while preserving stock for any subsequent honing or internal grinding.

RFQ

Send your drawing for a manufacturing review

Quantity, material, quality requirements and delivery country help us review the appropriate manufacturing and shipment route.

Send your drawing for a quote

No account needed.
Your drawings are kept confidential and used only for quotation.