AddMultiTurn – Expansion of Low-Cutting-Resistance Breakers and Internal Turning Holders

Iwaki, Japan – April, 2026 – Tungaloy Corporation (President: Satoshi Kinoshita, Head Office: Iwaki City, Fukushima Prefecture) announces the expansion of its AddMultiTurn series, featuring new low-resistance chip breakers, an extended range of internal turning holders. This lineup enables high-efficiency machining across a wide range of operations, from external to internal machining.

Challenges and Trends

In the machining of automotive parts and general industrial machinery parts, there is a demand for both increased productivity and stable machining. In particular, in the external and internal diameter turning of medium to large workpieces, while the adoption of high-efficiency machining using high feed rates is progressing, challenges remain, such as increased chatter due to high cutting resistance and a decrease in surface finish quality. Furthermore, depending on the workpiece material and machining shape, chip evacuation efficiency in internal diameter machining is often reduced, impacting productivity.

Product Overview

AddMultiTurn is a series of turning tools that, thanks to its innovative insert shape, can handle machining in all directions, including external diameter machining, end face machining, contouring, and high-feed post-turning, all with a single tool. The high-rigidity clamping mechanism ensures high stability even in multi-directional turning and high-feed machining. Furthermore, the square shank holder and PSC holder equipped with an internal coolant supply mechanism ensure reliable coolant supply to the cutting edge, improving chip evacuation, surface finish quality, and suppressing cutting edge wear.

Benefits and Features

Feature 1: Addition of Low-Resistance Chip Breakers
– Newly developed low-resistance TLM and TLF chip breakers reduce cutting resistance by 20% or more
– Suppresses chatter and ensures stable machining even under high feed conditions
– Expanded product lineup enables high-efficiency machining across a wide range of applications
– Low resistance reduces stress on the workpiece and extends tool life

Feature 2: Added AH6225 as the primary recommended grade for stainless steel machining
– Offers an excellent balance of wear resistance and chip resistance, providing high versatility
– The addition of the AH6225 grade enables stable, long tool life across a wider range of workpiece materials

Feature 3: Addition of round-shank holders for internal machining
– Equipped with an internal coolant supply mechanism, delivering coolant four times more efficiently than external supply systems
– Excellent chip evacuation reduces machining issues
– Supports internal machining up to L/D = 3, achieving high-efficiency machining comparable to external machining

Cutting Performance

Insert 6C-TOMG250608M-TLM AH6225
Toolholder ATXOR2525X25-CHP
Workpiece material SUS304/X5CrNi18-9
Cutting speed Vc = 180 m/min
Feed f = 0.6 mm/rev
Depth of cut ap = 1 mm
Machining Back turning
Coolant Wet

– 2 times higher productivity and tool life compared to standard ISO inserts, improving unit cost performance.
– 3 times longer tool life when combined with the new internal coolant holder, further reducing cost per unit.

Insert 6C-TOMG250608M-TM T9225
Toolholder A32S-ATXOR25
Workpiece material SCM440/42CrMo4
Cutting speed Vc = 200 m/min
Depth of cut ap = 1 mm
Tool overhang L/D = 3
Machining Back turning
Coolant Wet

– New internal toolholder performed excellent chip evacuation in back turning.
– 2 times higher productivity and 3 times longer tool life achieved compared to ISO inserts.

Success Stories

IMPROVED TOOL LIFE

New AddMultiTurn TLM chipbreaker extended tool life by 2 times and reduced machining time by 67% through high-feed back turning in stainless steel.

Industry Engineering
Component Billet
Material ISO code M - Stainless steel Stainless steel
Work material SUS316L/316L
Machine(Spindletype) CNC Lathe
Tool family Turning
Toolcategory External turning
Product name AddMultiTurn
TSR No. 35571

IMPROVED TOOL LIFE

New AddMultiTurn internal holder extended tool life by 2 times and reduced machining time by 57% through high-feed back turning in internal roughing.

Industry Engineering
Component Ring
Material ISO code P - Steel Steel
Work material SCr420/20Cr4
Machine(Spindletype) CNC Lathe
Tool family Turning
Toolcategory Internal turning
Product name AddMultiTurn
TSR No. 35431