73mm Boring Bar Holder E2 S Reduced Vibration Slotted, DIN 69880 - TECWERK

Reliable, slotted VDI40 tool holder combining vibration damping, coolant capability and secure turret retention for consistent boring performance; order the holder directly via Metav Werkzeuge or consult their specialists for application advice.

Tool holder for boring bars, E2 S, VDI40 — TECWERK, Type B

The tool holder for boring bars, E2 S is a slotted, vibration-reducing clamping unit designed for precision boring and turret-mounted turning centres compatible with the VDI40 interface.

• Slotted design reduces vibration
• Compatible with VDI40 turret interface
• Supports external and internal coolant
• Retaining ring prevents falling into turret

Precise vibration control for smoother machining

The slotted E2 S clamping section is engineered to wrap the boring bar, which reduces chatter and improves surface finish during boring operations. This mechanical damping is especially beneficial when machining with long overhangs or when using heavier cutting depths; the design helps to maintain concentricity and repeatability, translating into fewer reworks and higher throughput. The combination of the slotted sleeve and the VDI interface ensures consistent clamping force and improved dynamic stability across production runs.

Coolant support and tool versatility for varied applications

Integrated provision for both external and internal coolant increases process flexibility and helps to control cutting temperatures, particularly when machining steels and alloys. The holder accepts solid round boring bars, including those with a V-groove, allowing seamless use of common bar profiles without auxiliary adapters. Slotted lengths are specified to suit different bar diameters (e.g. up to 16 mm: 4 x D; 20 and 25 mm: 3 x D; from 32 mm: 2.5 x D), which gives clear guidance for selecting the correct bar diameter to achieve optimum clamping and chip evacuation.

Compatibility and dimensional clarity for easy integration

Conforming to DIN 69880, the holder matches VDI40 turret interfaces and standard machine fittings, simplifying procurement and machine setup. Key dimensions are D 73 mm and an overall length 174 mm, with a working length L1 of 152 mm and bore diameters d1/d2 of 40 mm, which supports standard 40 mm shank boring bars. Type B indicates a non-through-drilled shank; therefore, length adjustment from the shank side is not applicable for this variant. These clear specifications aid planning for tool magazines and ensure correct selection for existing tooling systems.

Secure retention and workshop reliability

The design includes a retaining ring that secures the holder against falling into the turret, addressing a common operational risk and safeguarding spindle and turret components. Where through-drilled variants are used, length adjustment can be performed from the shank side, but as Type B is not through-drilled, the focus here is on robust clamping and straightforward installation. Manufactured for industrial workshop environments, the holder supports repeatable setups and contributes to predictable machining cycles.

Contact Metav Werkzeuge for tailored technical guidance on VDI40 clamping solutions and to arrange prompt delivery: info@metav-werkzeuge.com, +49 2822 7131930

Technical data

• Article number: 2000833492NW
• Manufacturer: TECWERK
• Product type: Tool holder for boring bars

Facts

• Diameter D: 73 mm
• Overall length L: 174 mm
• Length L1: 152 mm
• d1: 40 mm
• d2: 40 mm

Special features

• Form: E2 S
• Standard: DIN 69880
• Type: B (not through-drilled)
• Slotted design; reduces vibration by wrapping the boring bar
• Suitable for solid round boring bars with V-groove
• Slotted area dimensions: up to 16 mm = 4 x D; 20 and 25 mm = 3 x D; from 32 mm = 2.5 x D
• External and internal coolant possible
• Secured by retaining ring to prevent falling into the turret

FAQ

What does Type B mean for this tool holder?
Type B denotes a non-through-drilled shank; the holder is supplied without a central bore through the shank, so length adjustment from the shank side is not possible for this Type B variant.

Is the holder compatible with standard VDI40 turrets?
Yes. The Tool holder for boring bars, E2 S, VDI40 — TECWERK, Type B is designed to meet DIN 69880 and to fit VDI40 turret interfaces commonly used in turning centres.

Can this holder be used with solid boring bars without coolant holes?
The slotted design accepts solid round boring bars, including those with a V‑groove; coolant can be applied externally and, where appropriate tooling is used, internally as well.

How does the slotted design affect vibration during machining?
The slotting allows the holder to envelop the bar and apply a damping effect that reduces chatter, improving surface finish and repeatability for longer overhangs or heavier cuts.

Are there specific bar diameters recommended for the slotted area?
Yes. Slotted proportions are specified for different bar diameters: up to 16 mm = 4 x D; 20 and 25 mm = 3 x D; from 32 mm = 2.5 x D, which assists in selecting the correct bar size for secure clamping.

Manufacturer / Responsible: NORDWEST Handel AG, Robert-Schuman-Straße 17, 44263 Dortmund