JRF Cutter

For machining heat-resistant alloys ｜ Ceramic

NTK’s innovative small-diameter milling cutter, designed specifically for machining heat-resistant alloys

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Unbeatable ceramic cutter: as small as Ø 16 mm .63 inches with 3 negative, double-sided indexable inserts

Up to three negative inserts on a Ø 16 mm .63 inches cutter body deliver exceptional performance. Featuring double-sided usability and high cutting edge strength, the negative inserts*, combined with the high-efficiency 3-flute design, ensure reduced tool costs, stable machining, and enhanced productivity. *U.S. Design Patent No. D1,068,888

Shank Type

Modular Type

Features

Higher number of inserts for an umpararelleled efficiency
Negative inserts with higher cutting edge strength for higher stable machining
Economical double-sided negative insert
Up to 3 negative inserts on ø 16 mm .63 inches cutter body

Increased clamping force prevents insert rotation during machining

🟡 Available corners

Increased clamping force prevents insert rotation during machining

Cutter body dia.: ø 16 mm .63 inches (Bottom machining Dia.: ø 9.65 mm .38 inches )
Work material	Inconel718
Cutting speed	606 m/min 1988.2 ft/min (20000rpm）
Feed	0.1 mm/t .004 in/t
DOC	1 mm .04 in
Removal volume per tooth	16.66 cc 1.017 ci

※Since the new NTK cutter has three inserts, the total volume removed is 1.5 times that of competitor’s.

A step breaker with the cutting edge lowered from the clamping surface suppresses flaking.

Cutting conditions

Grade	Material	Operation type	Cutting speed	Feed	DOC	Coolant
SX3 / SX9	Heat resistant alloys	Milling	400 – 700 ‒ 1000 m/min 1312.3 – 2296.6 – 3280.8 ft/min	0.08 – 0.10 – 0.12 mm/t .003 – .004 – .005 in/t	1 mm .04 inches	DRY

※Since the new NTK cutter has three inserts, the total volume removed is 1.5 times that of competitor’s.

Allowable rotation speed

Cutter Item number	Cutting edge dia	Tooth	Allowable rotation speed (min^-1)
JRFMH016E160R03	16	3	20,000
JRFIH0625E0625R03	15.875		20,000
JRFMH020E200R03	20		17,500
JRFIH075E075R03	19.05		17,500
JRFMH025E250R04	25	4	15,000
JRFIH100E100R04	25.4	4	15,000
JRFMH025E250R03	25	3	15,000
JRFIH100E100R03	25.4	3	15,000
JRFMH032E320R05	32	5	12,500
JRFIH125E125R05	31.75	5	12,500
JRFMH032E320R04	32	4	12,500
JRFIH125E125R04	31.75	4	12,500
JRFMH032E320R03	32	3	12,500
JRFIH125E125R03	31.75

Case study

Waspaloy（Combustion case)
	JRF Cutter	Competitor’s
Grade	SX9	SX9 (RP)
Tooth	5 ø32 mm ø1.26 inches	3 ø32 mm ø1.26 inches
Vc	564 m/min 1850.4 ft/min	564 m/min 1850.4 ft/min
Fz	0.05 mm/t .002 in/t	0.05 mm/t .002 in/t
F	2000 mm/min 78.74 in/min	1200 mm/min 47.24 in/min
DOC ap	1 mm .04 inches	1 mm .04 inches
Tool life	2 Pass	1 Pass
Corner	8	5