Cutting Off and Grooving System GY/GW Series

Monoblock Holder for Swiss-Type Automatic Lathe

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Solutions to Cutting-Off Problems
New high rigidity geometry is ideal for deep grooving.

Product Brochure

GY Series Features

New high rigidity geometry is ideal for deep grooving.

Highly Reliable Insert Clamp

The safety key locks the insert and prevents movement.
The convex geometry ensures high precision clamping.

Monoblock Holder for Swiss-Type Automatic Lathes

The new geometry with greatly improved rigidity suppresses vibrations and dimensional changes, thereby solving common cutting-off problems.

Overhang Length Compatible with Swiss-type Automatic Lathes

Head length corresponding to the maximum machining diameter of CNC Swiss Type automatic lathes and turret machines.

Features of the High Rigidity Holder

Strong Clamp Bridge

The strong design of the clamp bridge suppresses chatter and vibration.

Strengthening of the Insert Clamp

The seating face of the insert becomes wider reducing the deformation of the workpiece material.

Holder for Sub-spindle Applications

By incorporating a relief in the holder body, interference with the sub-spindle is avoided, enabling close-proximity machining with the main spindle.

Addition of Holders Supporting Workpiece Diameters of ø38 mm and ø42 mm with High-Feed Cutting

New holders supporting grooving and cutting‑off for workpiece diameters up to ø42 mm have been added, offering high‑feed cutting‑off performance with excellent machining stability for grooving operations where cutting to the workpiece centre is not required.By reinforcing the lower clamp bridge, these holders offer greater resistance to chatter and vibration than standard types, enabling high‑efficiency machining with higher feed rates.

Fixed Lower Clamp Bridge
(Large‑diameter parting holder / High‑Feed Cutting type)

Significantly reduces the tendency of the insert centre to drop during machining under cutting loads (cutting resistance).

Features of the Internal Coolant Holder

Direct coolant supply improves operational efficiency, while internal coolant delivery extends insert life.

Direct Coolant Supply

The hoseless direct coolant supply system reduces the time and effort required for setup and clean-up.
It improves operability and contributes to cost reduction.
Conventional hose-type coolant supply can also be used.

Coolant Supply to the Cutting Edge

Coolant is supplied directly from the holder tip to the insert flank face and cutting edge.
This enhances cooling and lubrication performance, contributing to extended tool life.

SUS304 Internal Coolant Parting Tool Life Comparison

The effect of internal coolant enables stable machining even under high‑speed cutting conditions. Compared with a conventional external coolant holder, insert life is improved by more than five times.

GW Series Features

High-Rigidity Holder

Tool deflection caused by cutting resistance and the remaining material pip in the centre are greatly reduced.

New Low Resistance and High Lead Angle Insert

New inserts with a lead angle of 8º have been added to the range to reduce burrs and the remaining material pip in the centre.

Cutting Performance

Surface Finish Comparison when Cutting Off : JIS SUS304

The high-rigidity holder suppresses chatter vibration and deflection, improving the finished surface.

SUS304 Sub‑spindle Holder Parting Surface Finish Comparison

The shortened tip design allows the sub‑spindle to be positioned closer to the main spindle, suppressing chatter, vibration and achieving a superior surface finish.

SUS304 Large‑diameter Holder (High‑Feed Cutting Type)
Deep Grooving Surface Finish Comparison

The high‑rigidity holder suppresses chatter vibration and deflection even at increased cutting speeds, resulting in an improved surface finish.

Conventional Holder