25mm Drilling Bar A20Q With Internal Coolant, Left-Hand 93° Cutting Angle - Teknik Makina

Reliable chip evacuation and consistent tool alignment make this boring bar ideal for productive machining: the combination of internal coolant, a 25 mm diameter and a robust clamping interface ensures stable performance in serial and job-shop environments. Order the KA284TM through Metav Werkzeuge or contact our consultants for technical advice.

Boring bar A20Q (25 mm) — 180 mm length, internal coolant (Teknik Makina)

The Boring bar A20Q is a precision turning accessory designed for internal coolant supply and stable insert clamping, suitable for medium-duty machining operations where chip control and repeatable set-up are required.

• Internal coolant supply
• 25 mm diameter, 180 mm overall length
• Shank Ø 20 mm for secure mounting
• Left-hand cutting direction

Stable geometry for repeatable machining results

The bar's core advantage is a stiff shank design with a shank diameter of 20 mm, which reduces bending and vibration during interrupted cuts. With an overall length of 180 mm and a tool weight of 0.7 kg, the component balances accessibility and rigidity to support consistent bore quality. Passive stability, achieved through its geometry, results in fewer rejects and extended insert life when compared with less rigid tooling.

Efficient chip control and coolant management

Equipped with internal coolant, this tool channels cutting fluid directly to the insert zone, promoting efficient chip evacuation and reduced thermal load at the cutting edge. The combination of clamping width 13 mm and a cutting edge height of 32 mm provides a secure seat for indexable inserts, enabling predictable cutting behaviour. The left-hand cutting orientation and a 93° cutting angle are designed to suit specific spindle and workpiece set-ups, improving process reliability on compatible machines.

Workshop integration and serviceability

Assembly and maintenance are straightforward: the insert is secured with a Torx fastener using Torx T8, screw size M2.5x6.5, which simplifies changeovers and reduces downtime. The tool's ISO designation A20Q and SKU KA284TM support procurement and inventory tracking. Its compact design allows straightforward fitment in standard toolholders while maintaining coolant-fed operation for longer insert life and cleaner chip flow.

Contact Metav Werkzeuge for specification checks and supply of the Teknik Cutting Tools KA284TM boring bar with internal coolant, available for prompt delivery from Emmerich.

Technical data

• Article number: KA284TM
• Product type: Boring bar
• ISO designation: A20Q
• Manufacturer: Teknik Cutting Tools

Dimensions & weights

• Diameter: 25 mm
• Overall length: 180 mm
• Shank diameter: 20 mm
• Cutting edge height: 32 mm
• Clamping width: 13 mm
• Weight: 0.7 kg
• Cutting angle: 93°
• Cutting direction: left

Features & fasteners

• Internal coolant: yes
• Torx key: T8
• Torx screw: M2.5x6.5
• SKU: KA284TM

FAQ

What is the shank diameter and how does it affect clamping?
The shank diameter is 20 mm; a robust shank improves clamping stability and reduces deflection when the KA284TM boring bar is used in standard toolholders.

Is coolant compatibility required for this tool?
Yes, the bar features internal coolant; machines with coolant-through capability will provide the full benefit of improved chip evacuation with this boring bar from Teknik Cutting Tools.

Which cutting direction does the bar support and why does it matter?
This tool is configured for left-hand cutting; matching the bar's cutting direction to the machine spindle and insert geometry is essential for correct cutting forces and chip flow.

What fasteners are needed for insert changes?
Insert clamping uses a Torx screw M2.5x6.5 tightened with a Torx T8 key, which speeds up insert changes and ensures repeatable torque during assembly.

How is the tool referenced for ordering and inventory?
Use the SKU KA284TM and ISO designation A20Q to ensure the correct boring bar configuration is supplied.

Manufacturer: 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