Carbide preform blanks

Special sintered/preformed carbide blanks from Japan

Custom made carbide blanks suitable for Cutting Tools, FSW pins and Molding Die parts manufacturing

Custom designed pre-formed blanks with short lead time

Straight/Helical flutes, multiple steps, coolant holes/channels delivered as raw/sintered or semi-finished/pre-ground

"Binderless" cobalt free grade for incredible corrosion & wear resistance

Binderless grade (with 0% cobalt content)

No Cobalt = No Corrosion
Increased hardness & tensile strength

Since the alloy does not contain any cobalt, it has better corrosion resistance and resistance to wear than existing cemented carbide grades.

Applications:

Parts that are continuously exposed to heavy loads
Parts that need to be wear resistant
Parts operating in strong acidic or other harsh environments
Parts that need to be corrosion resistant
Parts that need to be heat resistant

Since the material does not contain any cobalt, which is ferromagnetic, it is not attracted to magnets. New materials are not only used in automobiles, electronic devices or airplanes, but in a wide variety of devices.

Experiment in highly acidic test environment

See result of comparison test after a 120-hour immersion in acidic and alkaline test liquids at room temperature

No corrosion was found in the new material after soaking it in the acidic solution.

Cemented carbides immersed in acidic or neutral solutions will leach cobalt and other metals from their surface.

This is referred to as the “rust” of cemented carbides.

Our new binderless material have greater corrosion resistance than cemented carbides.

Mass measurement result after immersion test:

Test Solution	Test piece	Mass before test (g)	Mass after test (g)	Mass loss (mg)
1wt% Hydrochloric Acid	Normal carbide grade	8.98358	8.97005	13.53
1wt% Hydrochloric Acid	BINDERLESS carbide	7.93670	7.93662	< 0.1 (0.08)
1wt% Sodium Hydroxide	Normal carbide grade	8.98894	8.98846	0.48
1wt% Sodium Hydroxide	BINDERLESS carbide	7.98526	7.98515	0.11

Properties

Binderless carbide is harder and has higher compressive strength compared to existing cemented carbides.

	BINDERLESS carbide	Normal carbide	Steel S45C (quenched & tempered)
HARDNESS (HV)	2,100-2200	1,650	212 ～ 284
COMPRESSIVE STRENGTH (MPa)	6,400	4,600	690 and above (TENSILE STRENGTH)
TRANSVERSE RUPTURE STRENGTH (MPa)	1,500	4,300	–

Since these binderless materials have size and other constraints, please consult us before ordering.

Standard grades

※1: The harder the material, the more resistant it is to wear.

※2: The higher the amount of cobalt (Co) in the material, the higher the fracture toughness value is. Thus, chipping and breakage of the cutting edge are less likely to occur.

※3: The lower the amount of cobalt (Co) in the material, the better the thermal conductivity is. For this reason it is difficult for heat to accumulate in the cutting edge during machining.

Physical and mechanical properties

Class	Grade	Grain Size	ISO Code	Hardness	TRS	Specific Gravity	Chemical Composition [wt%]
Class	Grade	[µm]		[HRA]	[Gpa]	Specific Gravity	WC	Co	Other
ULTRAFINE	NU08	0.3	K05	93.8	4.3	14.6	Bal.	8.0	0.3
	NF08	0.5	K05-K10	93.2	4.5	14.5	Bal.	8.0	0.3
	TF9K	0.5	K05-K15	93.0	3.8	14.5	Bal.	9.0	0.5
	NF10	0.5	K10-K30	92.5	4.6	14.3	Bal.	10.0	0.3
SUBMICRON	TUZ5T	0.6	K05-K10	93.0	3.2	15.0	Bal.	5.0	0.5
	TUZ8	0.6	K10-K20	92.0	4.2	14.3	Bal.	10.0	–
	TUZ20K	0.6	K15-K40	91.2	3.9	14.1	Bal.	13.0	0.5
	NF15	0.8	K20-K40	91.5	4.3	14.4	Bal.	10.0	–
FINE / MEDIUM	TK8	0.8-2.0	K10	92.0	3.3	14.9	Bal.	5.5	0.66
	TG2	1.5-3.5	K20	90.8	3.5	14.8	Bal.	7.0	–
	TG5	1.5-3.5	K40	88.0	3.6	14.2	Bal.	12.5	–

※: All grades available in bar format, highlighted grades are also available as pre-forms.

Applications

Suitable tools

Work material

Grade

Endmill

Drill

Reamer

Punching tool

Mild steel

General steel

High hardness steel

Stainless steel

Titanium alloy

Inconel

Cast iron

Copper alloy

Graphite

NU08

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NF08

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TF9K

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NF10

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TUZ5T

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TUZ8

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TUZ20K

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NF15

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TK8

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TG2

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TG5

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Detailed grades

Grade NF15

A generally used grade with equally good wear resistance and toughness. Because of its toughness it is often the base material for making endmills used for cutting at low speed where chipping resistance is essential and is also a suitable material for small diameter tools used where breakage resistance is necessary. It is a widely used work material that can be machined to a variety of configurations.

Grade TUZ20K

A fine grain alloy with reinforced toughness. As it is not susceptible to chipping, it is the recommended base material for thin cutting edges in end mills.

Grade TK8

It is a medium grain alloy with excellent wear and heat resistance and designed to enable processing at high temperatures.

Specification / Preformed blanks

1. Finishing diameter (Max 59mm)

Shape	Tolerance
Full SOLID	ΦD +0.4 / +0.9
Top Solid (for brazing)	ΦD +0.5 / +1.0

2. Flute Length (Max 250mm)

Length	≤100		100 ~ 150		150 ~ 250
Tolerance	0 / -1.0		0 / -1.5		0 / -2.0

3. Length (Max 330mm)

Length	≤ 50		50 ~ 100		100 ~ 150		150 ~ 330
Tolerance	+0.8 / +0.3		+1.3 / +0.3		+1.8 / +0.3		+2.3 / +0.3

4. Runout

Shape	Tolerance
Full SOLID	≦0.2
Top Solid (for brazing)	≦0.3

5. Web / Above Center

Tolerance

+1.0 / +0.5

6. Coolant Hole (min Φ 0.5 or above)

Specification / Standard straight coolant bars

Round Bar 2 hole Straight Coolant (unground)– standard stock

※Other grades & sizes can be available upon request

● Standard Stock ◇ Order made
Grade	TUZ20K	NF15	TK8	G2	G5
OD/OAL	300L(mm)	300L(mm)	310L(mm)	330L(mm)	330L(mm)
1.0	●	●	●	●	●
1.5	●	●	●	●	●
2.0	●	●	●	●	●
2.5	●	●	●	●	●
● Standard Stock ◇ Order made
Grade	TUZ20K	NF15	TK8	G2	G5
OD/OAL	395L(mm)	400L(mm)	420L(mm)	420L(mm)	420L(mm)
3.0	●	●	●	●	●
3.5	●	●	●	●	●
4.0	●	●	●	●	●
4.5	●	●	●	●	●
5.0	●	●	●	●	●
5.5	●	●	●	●	●
6.0	●	●	●	●	●
6.5	◇	◇	●	●	◇
7.0	●	●	●	●	●
7.5	◇	◇	●	◇	◇
8.0	●	●	●	●	●
8.5	◇	◇	●	◇	◇
9.0	●	●	●	●	●
9.5	◇	◇	●	◇	◇
10.0	●	●	●	●	●
10.5	◇	◇	●	◇	◇
11.0	●	●	●	●	●
11.5	◇	◇	●	◇	◇
12.0	●	●	●	●	●
12.5	◇	◇	●	◇	◇
13.0	●	●	●	◇	◇
13.5	◇	◇	●	◇	◇
14.0	●	●	●	◇	◇
14.5	◇	◇	●	◇	◇
15.0	●	●	●	◇	◇
15.5	◇	◇	●	◇	◇
16.0	●	●	●	◇	◇
16.5	◇	◇	◇	◇	◇
17.0	◇	◇	◇	◇	◇
18.0	◇	◇	◇	◇	◇
19.0	◇	◇	◇	◇	◇
20.0	◇	◇	◇	◇	◇

Grade: TK8 OAL: 420L (mm)
OD	Hole D (d)	Pitch (P)
5.0	0.6	2.4
6.0	0.9	3.0
7.0	1.0	3.2
8.0	1.2	3.5
9.0	1.4	3.7
10.0	1.6	4.3
11.0	1.8	4.8
12.0	1.8	5.5
13.0	1.8	5.5
14.0	1.8	5.5
15.0	1.8	5.5
16.0	1.8	5.5
17.0	2.0	6.0
18.0	2.0	6.0
19.0	2.0	6.0
20.0	2.0	6.0

Specification / Standard spiral coolant bars

NF15　Round Bar Spiral coolant – standard stock

※ Other grades & sizes can be available upon request

2 Holes OAL 405 (mm) + Twist angle 10°
O/D	d-P
6	φ0.60-1.80
8	φ0.90-2.80
10	φ0.90-2.80
12	φ1.20-3.50

2 Holes OAL 405 (mm) + Twist angle 20°
O/D	d-P
4	φ0.60-1.80
5	φ0.70-2.10
6	φ0.70-2.60
7	φ1.00-3.30
8	φ1.00-4.00
10	φ1.40-4.80
12	φ1.40-6.25
14	φ1.75-7.10
16	φ1.75-8.30
18	φ2.00-9.55
20	φ2.00-10.40

2 Holes OAL 405 (mm) + Twist angle 30°
O/D	d-P
3	φ0.30-1.00
3	φ0.30-1.40
3	φ0.40-1.70
4	φ0.40-1.75
4	φ0.60-2.20
5	φ0.55-2.30
5	φ0.70-2.60
6	φ0.70-2.60
6	φ0.80-3.40
7	φ0.80-2.20
7	φ0.80-3.40
7	φ1.00-3.70
8	φ1.00-2.70
8	φ1.00-4.00
9	φ1.00-3.00
9	φ1.00-4.00
9	φ1.40-4.80
10	φ1.00-3.20
10	φ1.40-4.80
11	φ0.80-3.00
11	φ1.00-3.40
11	φ1.00-4.70
11	φ1.40-5.30
12	φ1.40-4.30
12	φ1.40-6.25
13	φ1.40-4.30
13	φ1.75-6.50
14	φ1.40-4.80
14	φ1.75-7.10
15	φ1.75-7.70
16	φ1.20-3.70
16	φ1.40-5.30
16	φ1.75-8.30
17	φ1.75-8.90
18	φ1.40-6.25
18	φ2.00-9.55
19	φ2.00-10.10
20	φ1.75-7.10
20	φ2.00-10.40

2 Holes OAL 405 (mm) + Twist angle 40°
O/D	d-P
6	φ0.40-1.70
6	φ0.50-2.20
8	φ0.65-2.70
10	φ0.80-3.50
12	φ0.90-4.20

3 Holes OAL 405 (mm) + Twist angle 30°
O/D	d-P
3	φ0.35-1.60
4	φ0.35-1.95
4	φ0.40-2.30
5	φ0.40-2.90
6	φ0.50-3.20
7	φ0.65-4.30
8	φ0.70-4.00
8	φ0.70-4.30
9	φ0.85-5.10
10	φ0.85-5.10
11	φ1.10-5.70
12	φ1.10-6.30
13	φ1.20-6.80
14	φ1.40-7.30
15	φ1.40-7.80
16	φ1.60-8.30
17	φ1.60-8.60
18	φ1.70-9.50
19	φ1.70-10.20
20	φ1.90-10.20

3 Holes OAL 405(mm) + Twist angle 40°
O/D	d-P
6	φ0.50-2.50
8	φ0.50-3.35

Accuromm Central Europe

/ A tool engineering company that supports all work related to tools

Accuromm Central Europe

A tool engineering company that supports all work related to tools