ROTARY BLANKS
Mitsubishi Materials Corporation is a comprehensive manufacturer of cemented carbide. Production technology and know-how acquired through many years of manufacturing coupled with stringent quality control has resulted in producing a complete line of high quality carbide products. Research and development is a top priority in our quest for continued improvement. Basic technologies are explored in our R&D center and application research is performed in each factory to tailor these technologies to the individual needs of customers.

Blanks for PCB drills
Some of cemented carbide PCB drill blank dimensions
Solid type
Ordering code øD(mm) L(mm)
code tolerance code tolerance
3.25D x 38.6 3.25 +0.03
-0		 38.6 +0.5
-0
3.25D x 38.3 3.25 +0.03
-0		 38.3 +0.5
-0
* rough ground
Composite type
Ordering code øD(mm) L(mm)
code tolerance code tolerance
1.4D x 235 1.4 +0.35
+0.15		 235 +1.0
+0.3
1.4D x 110 1.4 +0.35
+0.15		 110 +1.0
+0.3
1.8D x 110 1.8 +0.35
+0.15		 110 +1.0
+0.3
1.420D x 15.5 1.420 ±0.003 15.5 ±0.1
1.420D x 16.8 1.420 ±0.003 16.8 ±0.1
1.820D x 15.5 1.820 ±0.003 15.5 ±0.1
1.820D x 16.8 1.820 ±0.003 16.8 ±0.1
*L = 110,235 unground
*L = 15.5, 16.8 ground
Cemented carbide grades for PCB drills
Application grade area
Application grade area MF20 MF10 MF07 SF10
*Grade selection guide for PCB dril
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Blanks for Endmills
Some of cemented carbide endmill/drill blank dimensions
Ordering code øD(mm) L(mm)
code tolerance code tolerance
3.0D x 40 3.0 +0.2
+0.1		 40 +1.0
-0
3.0D x 50 3.0 +0.2
+0.1		 50 +1.0
-0
4.0D x 40 4.0 +0.2
+0.1		 40 +1.0
-0
4.0D x 50 4.0 +0.2
+0.1		 50 +1.0
-0
4.0D x 60 4.0 +0.2
+0.1		 60 +1.0
-0
5.0D x 50 5.0 +0.2
+0.1		 50 +1.0
-0
6.0D x 50 6.0 +0.2
+0.1		 50 +1.0
-0
6.0D x 60 6.0 +0.2
+0.1		 60 +1.0
-0
6.0D x 70 6.0 +0.2
+0.1		 70 +1.0
-0
8.0D x 60 8.0 +0.2
+0.1		 60 +1.0
-0
8.0D x 70 8.0 +0.2
+0.1		 70 +1.0
-0
8.0D x 80 8.0 +0.2
+0.1		 80 +1.0
-0
10.0D x 70 10.0 +0.2
+0.1		 70 +1.0
-0
* rough ground
* Mitsubishi Materials can also supply finished ground material, "h6" etc., on request.
Cemented carbide grades for endmills
Recommended grades
Recommended grades
*Grade selection guide for solid endmill
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The other carbide rods
LRB
Ordering
code		 øD(mm) L(mm) Stoked
code tolerance code tolerance HTi10 TF15 MF10 MF20
LRB005 0.5 +0.5
+0.2		 240 +10.0
-0		 – –
LRB010 1.0    
LRB015 1.5    
LRB020 2.0    
LRB025 2.5    
LRB030 3.0 +0.5
+0.3		 330  
LRB040 4.0  
LRB050 5.0  
LRB060 6.0  
LRB070 7.0  
LRB080 8.0  
LRB100 10.0 +0.6
+0.3		  
LRB120 12.0  
Products available on request
Rods without straight hole available on request
Rods with the following dimensions can be made to order.Rods, rods with center holes, step-formed rods and tapered rods are available on request.
Rods without straight hole available on request
Rods with straight hole available on request
Sintered rods with 1 or 2 straight coolant holes with the following dimensions can be made to order.
Rods with straight hole available on request
Blank tolerances
Tolerance standards for the blanks made to order are as follows.
Diameter øD : mm
code øD<3 3<øD<10 10<øD<20
tolerance Upper bound +0.4 +0.5 +0.7
Lower bound +0.2 +0.2 +0.3

code ø20øD<25 25<øD<30 30<øD
tolerance Upper bound +0.9 +1.1 øD 5%
Lower bound +0.3 +0.3 +0.3
Over length L : mm
code L<30 30<L<50 50<L<70 70<L<100 100<L
tolerance Upper bound +0.4 +0.6 +0.8 +1.0 L 1.3%
Lower bound -0 -0 -0 -0 -0
Bore diameterød : mm
code 0.5ød<5 5<ød<10 10<ød<20 20<ød
tolerance ±0.1 ±0.15 ±0.2 ±ød 1%

+Note:
Mitsubishi Materials can manufacture special products in non-standard grade/geometry at your request. Please contact Sales Companies for ordering.