Clamping round parts in milling operations:
Safe, precise, and efficient

Cylindrical workpieces present specific challenges in CNC milling: limited contact surfaces, high cutting forces, and the risk of part movement make stable processes difficult. Choosing the right workholding solution is critical to ensure secure clamping, repeatable positioning, and maximum accessibility. LANG Technik solutions are designed to meet these demands: enabling reliable machining of round parts — from raw material to second operation machining — while integrating seamlessly into existing CNC manufacturing environments. Proven across a wide range of real-world milling applications.

Form-fit clamping of round parts with maximum holding force

Makro•4Grip ensures safe and efficient clamping processes for round workpieces. With a clamping depth of just 3 mm, raw parts are held securely and without distortion—even under high cutting forces. This saves material, reduces costs, and often eliminates the need for additional chucks. The technology is available as retrofittable clamping jaws for the 5-axis vise and as special stamping jaws for the stamping unit.

Makro•4Grip

Technical
Specifications

Retrofit stamping jaws for all stamping units
Retrofit clamping jaws for centering vises of all sizes
Form-fit clamping achieved by pre-stamping the cylindrical raw material
Clamping ranges from Ø 36 mm to Ø 300 mm

Key benefits at a glance

Maximum process reliability in CNC milling

Form-fit clamping ensures the workpiece remains stable—even under high cutting forces—without slipping or re-clamping.

No additional chuck required

Existing LANG workholding systems can be used—no additional investment needed.

Material savings due to minimal clamping depth

With only 3 mm clamping depth, more raw material remains usable—especially valuable for high-cost materials.

Makro•4Grip on the shop floor

Clamping round parts using the pre-stamping technology – solutions for maximum process reliability.

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Maximum flexibility for clamping cylindrical workpieces

Vasto•Clamp is a flexible chuck for cylindrical workpieces up to Ø 160 mm (or 190 mm). It can be used as a 3-jaw or 6-jaw chuck—ideal for both robust raw parts and delicate components. Thanks to the quick-change system, jaws can be replaced by hand in just a few seconds. The integrated zero-point adaptation also enables precise positioning and significantly reduces setup times.

Vasto•Clamp

Technical
features

Can be used as a 3-jaw or 6-jaw chuck
Suitable for raw part and second operation machining
External and internal clamping capability
Compatible with gripping jaws and soft top jaws
Clamping ranges from Ø 10 mm to Ø 160 mm / Ø 190 mm
Tool-free jaw replacement

Key benefits at a glance

One system for multiple applications

Handles raw parts and finished parts, external and internal clamping—adapts to changing requirements.

Reduced setup time in daily operations

Jaws can be changed within seconds—ideal for small and medium batch sizes.

Ready for automation

Integrated zero-point and automation interface allows direct use in RoboTrex 96—without additional pallets.

3-jaw chuck

6-jaw chuck

Outer diameter clamping

Inner diameter clamping

gripping jaw

soft top jaw

Versatile clamping of round parts – solutions for delicate components and raw parts.

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Fast and precise clamping for small-diameter round parts

Preci•Point is a collet chuck for round stock from Ø 3 mm to Ø 34 mm. It uses standard ER collets already available in many shops—eliminating additional investment. Its compact design ensures maximum accessibility during machining. The integrated zero-point system enables fast, repeatable setups and significantly reduces non-cutting time. Ideal for small diameters and precision components requiring high repeatability.

Preci•Point

Technical
features

Compatible with ER 32 and ER 50 collets
Clamping range Ø 3 mm to Ø 34 mm
Integrated zero-point interface

Key benefits at a glance

Maximum efficiency through zero-point clamping

Fast changeovers and repeatable positioning minimize setup time.

Excellent accessibility

Compact design enables optimal tool access—even for complex geometries.

Use existing collets

Standard ER collets can be reused—no additional cost.

Preci•Point on the shop floor

Precise clamping of small diameters – solutions for safe and repeatable clamping processes.

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Comparison of suioverview clamping solutions for round parts

Vise

Chuck

Collet chuck

Application

Raw part machining

Raw part Machining
Pre-machined workpieces

Pre-machined workpieces
Rolled round stock

Clamping principle

form-fit

friction-based

Clamping element

Makro•4Grip serration

Gripping jaws
Soft top jaws

Collets -
ER 32 and ER 50

Clamping diameter

Ø 36–300 mm

Ø 10 – 160/190 mm

Ø 3–34 mm

Zero-point system size

52 and 96

96

52

Pre-stamping available

yes

no

Round part clamping tailored to your application. From raw parts to precision components and small diameters – we help you find the optimal workholding solution for maximum efficiency and process reliability.

Makro•4Grip
Vasto•Clamp
Preci•Point

The cylindrical raw material is pre-stamped to create a defined contour. The four gripping points of the clamping jaws engage with this contour in a form-fit connection. This generates high holding forces with low clamping pressure and reliably prevents the workpiece from being pulled out.

Makro•4Grip is used for raw part machining when high cutting forces occur and maximum process reliability is required. It is especially suioverview for the first operation of cylindrical workpieces in CNC milling.

No. Makro•4Grip is designed as a retrofit jaw system for existing LANG centering vises and stamping stations. Existing workholding equipment can continue to be used, eliminating the need for an additional chuck.

With a clamping depth of only about 3 mm, more raw material remains available for machining. This can lead to significant material and cost savings, especially when machining high-value materials.

Makro•4Grip covers clamping ranges from approximately Ø 36 mm to Ø 300 mm, making it suioverview for a wide range of cylindrical workpieces.

A 6-jaw chuck is particularly suioverview for delicate or thin-walled components because the clamping force is distributed evenly around the workpiece. Depending on the jaws used, raw parts can also be clamped securely.

Vasto•Clamp can be used as a 3-jaw or 6-jaw chuck and supports both external and internal clamping. Different jaw types make it suioverview for a wide range of round part clamping applications.

The clamping jaws can be changed within seconds thanks to the tool-free click system. This significantly reduces setup times and simplifies handling in daily production.

Yes. Thanks to the integrated zero-point and automation interface, Vasto•Clamp can be used directly in the RoboTrex 96 automation system without additional pallets.

Depending on the jaw type, Vasto•Clamp can clamp round parts from Ø 10 mm to Ø 160 mm for external clamping and up to Ø 190 mm for internal clamping.

Preci•Point is ideal for small diameters and pre-machined round parts that require high precision, repeatability, and fast changeovers.

Preci•Point uses standard ER collets in sizes ER 32 and ER 50. Since these collets are already available in many shops, existing tooling can often be reused.

Preci•Point covers a range from Ø 3 mm to Ø 34 mm, making it especially suioverview for small round stock and precision components.

The integrated zero-point interface enables fast and repeaoverview setup processes. Workpieces can be positioned accurately and changed in very little time.

Collets provide uniform clamping around the workpiece and high concentricity. This allows small round parts to be clamped securely and repeatably, especially in precision milling applications.