TJR Hirth Coupling Index Table - HI Ø255

Sub-arcsecond angular precision for demanding multi-face machining operations.

TJR CNC Rotary Table Product Details And Specifications

HI-255R

HI-255R Product Specifications

HI-255R Product Specifications
Item	Data
Application	Vertical or Horizontal
Installation Mode	Add-on
Table diameter(mm)	Ø255
Inner diameter of mandrel sleeve(mm)	Ø50H7
Diameter of center through hole(mm)	Ø50
Center height (Vertical)(mm)	160
Table height (Horizontal)(mm)	205
Table T-slot width(mm)	12H7
Guide block width(mm)	18h7
Transmission Mechanisms	Worm and Worm Gear
Min. increment(deg.)	1 or 5
Indexing precision(sec.)	±5
Repeatability(sec.)	±1
Clamping system (MPa / kg/cm²)	Hirth coupling Hydraulic (3.5 / 35)
Clamping torque(N.m / kgf · m)	2943 / 300
Servo motor model(FANUC)(Straight shaft without key)	βis8
Servo motor model(MITSUBISHI) (Straight shaft without key)	HG-154
Speed reduction ratio	1:120
Max. rotation rate of table(min-1)	33.3
Allowable inertia load capacity (vertical)(kg-m²)	2.5
Allowable workpiece load (Vertical)(kg)	125
Allowable workpiece load (with support table)(kg)	250
Allowable workpiece load (Horizontal)(kg)	300
Allowable thrust load (with rotary table clamping) F (N / kgf)	15696 / 1600
(Axial)＊1 Allowable thrust load (with rotary table clamping) FxL (N.m / kgf·m)	1717 / 175
(Radial)＊2 Allowable thrust load (with rotary table clamping) FxL (N.m / kgf·m)	2943 / 300
Net weight ( sever motor excluded)(kg)	120
＊1	The structural limit value, while the actual operating speed will vary depending on the motor.

Frequently Asked Questions

What is the HI-255R?

The HI-255R is a CNC Hirth coupling indexing table used for accurate rotary positioning during machining.

What is the table size of the HI-255R?

The HI-255R has a table diameter of 255 mm.

Can the HI-255R be used vertically and horizontally?

Yes. The HI-255R can be installed in both vertical and horizontal positions.

How accurate is the HI-255R?

The HI-255R offers high indexing accuracy and repeatability, making it suitable for precise CNC machining.

What type of clamping does the HI-255R use?

The HI-255R uses hydraulic clamping with a Hirth coupling for strong and stable positioning.

How much weight can the HI-255R hold?

The maximum load depends on the installation position. It can handle up to 300 kg in horizontal use.

What is the maximum speed of the HI-255R?

The maximum rotation speed of the HI-255R is 33.3 min⁻¹.

Which CNC controls can be used with the HI-255R?

The HI-255R is available with servo motor options for FANUC and Mitsubishi CNC systems.

What is the indexing angle of the HI-255R?

The HI-255R is available with indexing increments of 1° or 5°, depending on the configuration.

Where is the HI-255R used?

The HI-255R is used in CNC machining where accurate rotary positioning and strong clamping are needed.

HI-255N Product Specifications

HI-255N Product Specifications
Item	Data
Application	Vertical or Horizontal
Installation Mode	Add-on
Table diameter(mm)	Ø255
Inner diameter of mandrel sleeve(mm)	Ø50H7
Diameter of center through hole(mm)	Ø50
Center height (Vertical)(mm)	160
Table height (Horizontal)(mm)	205
Table T-slot width(mm)	12H7
Guide block width(mm)	18h7
Transmission Mechanisms	Worm and Worm Gear
Min. increment(deg.)	1 or 5
Indexing precision(sec.)	±5
Repeatability(sec.)	±1
Clamping system (MPa / kg/cm²)	Hirth coupling Hydraulic (3.5 / 35)
Clamping torque(N.m / kgf · m)	2943 / 300
Servo motor model(FANUC)(Straight shaft without key)	βis8
Servo motor model(MITSUBISHI) (Straight shaft without key)	HG-154
Speed reduction ratio	1:120
Max. rotation rate of table(min-1)	33.3
Allowable inertia load capacity (vertical)(kg-m²)	2.5
Allowable workpiece load (Vertical)(kg)	125
Allowable workpiece load (with support table)(kg)	250
Allowable workpiece load (Horizontal)(kg)	300
Allowable thrust load (with rotary table clamping) F (N / kgf)	15696 / 1600
(Axial)＊1 Allowable thrust load (with rotary table clamping) FxL (N.m / kgf·m)	1717 / 175
(Radial)＊2 Allowable thrust load (with rotary table clamping) FxL (N.m / kgf·m)	2943 / 300
Net weight ( sever motor excluded)(kg)	120
＊1	The structural limit value, while the actual operating speed will vary depending on the motor.

Frequently Asked Questions

What is the HI-255N?

The HI-255N is a CNC Hirth coupling indexing table used for accurate rotary positioning during machining.

What is the table size of the HI-255N?

The HI-255N has a table diameter of 255 mm.

Can the HI-255N be used vertically and horizontally?

Yes. The HI-255N can be installed for both vertical and horizontal machining.

How accurate is the HI-255N?

The HI-255N has an indexing accuracy of ±5 seconds and repeatability of ±1 second.

What type of clamping system does the HI-255N use?

The HI-255N uses a Hirth coupling with hydraulic clamping to hold the table securely during machining.

How much weight can the HI-255N hold?

The HI-255N can hold up to 125 kg in vertical use, 250 kg with a support table, and 300 kg in horizontal use.

What is the maximum speed of the HI-255N?

The maximum rotation speed of the HI-255N is 33.3 min⁻¹.

Which servo motors are available for the HI-255N?

The HI-255N is available with FANUC βis8 and Mitsubishi HG-154 servo motor options.

What indexing increments are available on the HI-255N?

The HI-255N is available with minimum indexing increments of 1° or 5°.

Where is the HI-255N used?

The HI-255N is used for CNC machining applications that need accurate rotary positioning and strong workpiece clamping.

Request a Quote

Tell us about your requirements, and we will develop a tailored solution for you

Call with us

Download Digital Product Catalogue

Download the brochure and see what precision looks like.

Download Now

Built on Innovation and engineered for Excellence.

We deliver precision indexing and rotary solutions that meet the highest standards of performance, trusted by manufacturers who demand accuracy, reliability, and results at every stage of production.

Send Enquiry

TJR Hirth Coupling Index Table - HI Ø255

HI-255R

Product Dimension

HI-255R Product Specifications

Frequently Asked Questions

Product Dimension

HI-255N Product Specifications

Frequently Asked Questions

Related Products

HI 320

HI 400

HI 500

HI 630

HI 800

HI 1000

Request a Quote

Download Digital Product Catalogue

Built on Innovation and engineered for Excellence.

4th Axis CNC Rotary Table

Optional Accessories

Quick Links