TURNING TOOLS

Boring Bars

Internal turning and boring toolholders for CNC lathes and conventional lathes.

Select a boring bar by insert shape, minimum bore diameter, shank size, tool hand, approach style and required overhang. Correct holder selection helps improve rigidity, chip control, dimensional stability and surface finish in internal turning.

BORING BAR SELECTION

Choose the Right Boring Bar

Start with the bore geometry and selected insert, then confirm holder size and machine clearance.

01 Insert Shape

Match the holder to the required insert family, such as CCMT, DCMT, VBMT or other compatible ISO insert geometry.

02 Minimum Bore Diameter

Confirm that the holder head and insert can enter the required bore without interference.

03 Overhang & Rigidity

Use the shortest practical overhang and the largest suitable shank diameter to reduce vibration and deflection.

04 Tool Hand

Select right-hand or left-hand configuration according to feed direction and internal machining setup.

05 Shank Diameter

Match boring bar diameter to the machine holder, turret or boring-bar sleeve while maintaining sufficient stiffness.

06 Machining Operation

Confirm whether the application requires general boring, internal profiling, facing, finishing or shoulder access.

INTERNAL TURNING

Rigidity Matters

Boring bars operate with greater overhang than most external turning holders, so stiffness is critical to stable machining.

SHORT OVERHANG Best Stability

Keep the bar extension as short as practical whenever component geometry allows.

LARGE SHANK Higher Rigidity

Select the largest shank diameter that can safely enter the bore and fit the machine holder.

LONG REACH Check Vibration Risk

Longer overhang increases deflection and vibration risk, especially during heavier cuts.

HOLDER DESIGNATION

How to Read a Boring Bar Code

Holder designations identify the clamping method, insert shape, holder style, clearance requirement and tool hand.

SCLCR
S Clamping System

Screw-type insert clamping designation.

C Insert Shape

C-shape, 80° diamond insert.

L Holder Style

Holder configuration and approach-style designation.

C Insert Clearance

Clearance-angle compatibility designation.

R Tool Hand

Right-hand holder designation.

Exact holder-code interpretation depends on the ISO designation and manufacturer series. Always verify the full holder and insert compatibility before ordering.

QUICK SELECTION

Match the Holder to the Application

General Internal Turning

Start with a general-purpose boring bar compatible with the required insert shape and bore diameter.

Internal Profiling

Use holder and insert geometry that provides sufficient access around internal contours and shoulders.

Finishing

Prioritise rigidity, low cutting force and suitable insert geometry for stable surface finish.

Small Bore

Minimum bore diameter becomes the primary constraint; check holder-head and insert clearance carefully.

AVAILABLE BORING BARS

Browse Boring Bar Series

Compare available boring bar styles, insert compatibility, sizes and pricing below.