25mm Drill Bar A20Q Internal Coolant Left-Hand 107.5° Cutting Angle, 180mm Overall - Teknik Makina

Benefit from precise internal turning with internal coolant and a rigid shank Ø20 mm that together deliver stable bore quality; order the KA312TM directly via Metav Werkzeuge or ask our consultants if needed.

KA312TM Boring bar A20Q — 25 mm, internal coolant (Teknik Makina)

The KA312TM is a 25 mm boring bar designed for precision internal turning, featuring internal coolant delivery and a robust 20 mm shank for secure clamping in turning centres.

• 25 mm diameter for precise boring
• Internal coolant for chip evacuation
• 180 mm overall length for deep bores
• Shank Ø20 mm with 13 mm clamp-holder

Consistent bore quality through a rigid geometry

The boring bar offers a 25 mm cutting diameter combined with a shank Ø20 mm, which promotes torsional stiffness and reduced vibration during machining. This geometry, defined under the A20Q designation, supports repeatable diameter tolerances and improves tool life when used in the correct holder. The cutting height 30 mm and 13 mm clamp-holder width ensure the insert is supported securely, translating into improved surface finish and dimensional stability.

Improved cooling and chip control for uninterrupted cycles

Thanks to internal coolant, the tool channels coolant directly to the cutting edge, which reduces temperature at the cutting zone and assists chip evacuation from deep bores. In practice, this lowers the risk of built-up edge and helps maintain cutting performance over longer cycle times. The combination of coolant flow and the component’s 180 mm overall length is engineered to balance reach with rigidity for demanding internal turning tasks.

Engineered for left-hand cutting and reliable assembly

The bar is specified for left-hand cutting, with a cutting angle 107.5° that defines the effective rake and clearance at the insert interface. Assembly and maintenance are straightforward: the head is secured with a Torx screw M2.5x6.5 and requires a Torx T8 key for clamp adjustment. These standardised fastenings simplify changeover and support consistent clamping torque when using calibrated drivers.

Practical fitment and workshop integration

Weight and dimensions have been optimised for handling and toolholder compatibility: at approximately 0.422 kg and with a compact profile, the tool integrates into common boring tool holders while providing sufficient mass to dampen minor vibrations. The combination of A20Q geometry and the internal coolant capability makes the bar suitable for applications where bore accuracy and chip management are priorities, helping to shorten set-up time and sustain production quality.

For precision internal turning with enhanced coolant control, request the KA312TM from Teknik Makina via Metav Werkzeuge — contact Metav Werkzeuge GmbH at +49 2822 7131930 or info@metav-werkzeuge.com for tailored advice and ordering support.

Technical data

• SKU: KA312TM
• Type: Boring bar
• ISO designation: A20Q
• Manufacturer: Teknik Cutting Tools

Facts

• Diameter: 25 mm
• Overall length: 180 mm
• Shank diameter: 20 mm
• Cutting height: 30 mm
• Clamp-holder width: 13 mm
• Cutting angle: 107.5°
• Weight: 0.422 kg

Special features

• Internal coolant
• Left-hand cutting direction
• Torx screw M2.5x6.5
• Torx key T8

FAQ

What is the ISO designation of this boring bar?
The boring bar is specified under the A20Q designation and is supplied as the KA312TM from Teknik Makina.

Does the tool provide internal coolant delivery?
Yes, the KA312TM features internal coolant routing to the cutting edge for improved heat control and chip evacuation.

What cutting direction is the bar designed for?
The tool is configured for left-hand cutting, with a cutting angle of 107.5°.

Which toolholder dimensions are required for correct clamping?
Use a holder compatible with a shank Ø20 mm and a clamp that accommodates a 13 mm head width.

What fastener and key are used to secure the cutting head?
The head is fixed with a Torx screw M2.5x6.5 and requires a Torx T8 key for assembly.

Manufacturer/Responsible: Teknik Cutting Tools, Buyukkayacık OSB Mah.422 Nolu Sokak.No:9, Selcuklu/KONYA/TURKEY / Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; eMail: info@metav-werkzeuge.com