Main image of the Nextas R-Series Manual Chuck

R-Series Chuck Thumbnail 3 - With Pallet

R-Series Chuck Thumbnail 4 - Clamping Mechanism

R-Series Chuck Thumbnail 5 - In Workshop

Versatile Manual Tooling

R-Series Manual Chuck

Robust Precision, Simplified.

The Nextas R-Series Manual Chuck provides a reliable, high-precision foundation for your workshop. Fully compatible with the System 3R tooling standard, this chuck offers exceptional versatility for job shops and production environments alike. Its simple, robust manual clamping mechanism ensures a secure grip and excellent repeatability without the need for pneumatic or hydraulic lines, making it perfect for quick setups on any machine.

Core Advantages

High Repeatability: Achieves a positioning accuracy of ≤0.005mm, allowing for confident transfer of workpieces between setups and machines.
Simple Manual Clamping: Fast and secure clamping with a single lever or key. No need for external power sources, simplifying installation and use.
System 3R Compatibility: Designed to seamlessly integrate with the widely used System 3R standard, including pallets, holders, and electrodes.
Hardened & Ground Body: Constructed from high-quality tool steel, hardened and precision-ground for maximum durability, rigidity, and a long service life.

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Product Details

Discover the engineering and design behind the R-Series Chuck.

Close-up of the manual clamping mechanism on the R-Series Chuck

Precision Clamping, Effortlessly

The Nextas R-Series Chuck simplifies precision workholding. The manual clamping mechanism is straightforward yet powerful. A simple turn of a clamping key actuates the internal locking system, drawing the reference element (pallet or holder) securely against the Z-reference faces. This direct mechanical action provides excellent tactile feedback and ensures a consistently strong and stable clamp, giving the operator full confidence in the setup. The design eliminates the complexity of air or hydraulic lines, making it exceptionally easy to install and move between different machines.

R-Series Chuck being used in a precision job shop environment

Engineered for Versatility

Manufactured from high-grade tool steel and hardened for wear resistance, the R-Series Chuck is built to last. Its low-profile design provides excellent access for tools and spindles, making it suitable for a wide range of applications, from vertical milling to sinker EDM. The universal System 3R-compatible interface means you can standardize your workholding across the entire workshop, streamlining your processes and reducing the need for multiple, disparate systems.

Technical Specifications

Parameter	Specification (Model Example: NEX-R80M)
Compatibility	System 3R (MacroMagnum, etc.)
Repeatability	≤0.005 mm
Clamping Power	~8000 N
Actuation	Manual, with clamping key/lever
Required Torque	~20 Nm
Indexing Positions	4 x 90°
Body Material	Hardened Tool Steel
Weight	5.0 kg

Application Fields

Versatile solutions for a wide range of machining tasks.

Manual chuck used in a die-sinking EDM machine

EDM & Milling

Its robust build handles milling forces, while its precision is perfect for setting up electrodes and workpieces for EDM operations.

Quick setup on a 3-axis CNC milling center with a pallet

Job Shops & Prototyping

Ideal for high-mix, low-volume work. The manual chuck allows for extremely fast and precise changeovers between jobs.

Using the R-Series chuck on a CMM for inspection

Quality Control & Inspection

Move workpieces directly from machine to inspection, ensuring consistent measurement results with the same reference system.

Setting up a workpiece on a workbench before machining

Offline Setup

Mount workpieces onto pallets at a separate station while the machine runs, making swaps quick and simple to maximize uptime.

Real-World Case Studies

Frequently Asked Questions

01. How does the R-Series Manual Chuck ensure its ≤0.005mm repeatability?

The repeatability is achieved through precision engineering. The chuck body is made from hardened tool steel and is precision-ground. The critical components, like the reference surfaces and clamping mechanism, are manufactured to extremely tight tolerances. This ensures that when a pallet is clamped, it returns to the exact same position, within 5 microns, every single time.

02. What is the main difference between the R-Series and an automated chuck (like the E-Series)?

The R-Series is a *manual* chuck. It's clamped and unclamped using a manual lever or key, requiring about 20 Nm of torque. This makes it simple, robust, and ideal for machines without pneumatic/hydraulic lines, or for quick, flexible setups in a job shop. An automated chuck (like our E-Series) uses pneumatic power to clamp and unclamp, making it suitable for integration into automated production cells.

03. Is the "System 3R Compatibility" 100% interchangeable?

Yes. The R-Series is designed to be a direct equivalent and fully compatible with the System 3R tooling standard (such as MacroMagnum). This means any of your existing 3R-standard pallets, holders, or electrodes will fit perfectly and achieve the specified repeatability, allowing you to integrate our chuck into your workshop without any compatibility issues.

04. What maintenance is required for the R-Series Manual Chuck?

The R-Series is designed for low maintenance. The most important tasks are regular cleaning to ensure no chips or debris accumulate on the reference surfaces or in the clamping mechanism, as this can affect accuracy. A light application of appropriate anti-corrosion oil is also recommended. The robust mechanical design (no-seals, no-pneumatics) means there is very little that can wear out.

05. Can I mount the R-Series chuck onto any machine table?

Yes, it's very versatile. The chuck body typically has mounting holes (e.g., a grid pattern) on its base. You can mount it directly to a machine's T-slot table using clamps and T-nuts, or you can bolt it to a sub-plate or a zero-point clamping system (like our Nextas zero-point plates) for even faster setup and transfer between machines.