Carbide Gundrill Blanks, Carbide Rotary Burr,Carbide Inserts For Metalworking Industry
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Carbide Preformed Blanks
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Carbide Preformed Blanks

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Compared with carbide stick blanks or short standard blanks, preformed blanks are more difficult on technique to ensure outer diameter, half diameter, roundness, roughness and straightness. We can manufacture it by custom requirement on drawing, even grind it with tolerance +0.000 ~ -0.005mm on outer diameter. So customer can soldered it directly on hollow shank for application.

Preformed blanks with single coolant hole, two coolant hole and kidney coolant hole are all available in stock.


Grade for Carbide blanks tips

GUHRING K10-K15 DK105 1.0um 6% Cobalt 92.3HRA
CERATIZIT K10-K15 CTF12E(H20X/HC20) 0.8um 6% Cobalt 92.2HRA
Harmetall-ESTECH K10-K20 RF13 0.8um 6.5% Cobalt 92.4HRA
STAR CUTTER K30-K40 HB110 0.8um 10% Cobalt 92.0HRA
KONETOOL K30-K40 KT30U 0.8um 10% Cobalt 92.1HRA
KONETOOL K10-K15 KT10U 0.6um 6% Cobalt 93.2HRA

carbide proform blanks


Carbide Tip - Cutting Edge Geometry

gundrill cutting edge geometry


Changes to the cutting edge geometry of the single-lip drill can affect the drilled surface, the chip shape, bore tolerance, drill centring, chip removal, surface quality and tool life.

 
With our standard grind facets virtually and drilling tasks can be executed successfully. When drilling deep holes in particularly long chipping materials and in materials that are difficult to machine it is generally necessary to use special grind facets, in some cases with chip-separators or chip-breakers.


Carbide Tip - Head Forms

gun drill head forms

 

Blanks Dia. [mm] L [mm] Gundrill Dia. [mm]
6.5 28 / 32 6.0
7.0 28 / 32 6.5
7.5 30 / 34 7.0
8.0 30 / 34 7.5
8.5 32 / 36 8.0
9.0 32 / 36 8.5
9.5 32 / 36 9.0
10.0 32 / 36 9.5
10.5 32 / 36 10.0
11.0 32 / 38 10.5
11.5 32 / 38 11.0
12.0 35 / 40 11.5
12.5 35 / 40 12.0
13.0 35 / 40 12.5
13.5 35 / 40 13.0
14.0 35 / 40 13.5
14.5 35 / 40 14.0
15.0 38 / 42 14.5
15.5 38 / 42 15.0
16.0 40 / 45 15.5
16.5 40 / 45 16.0
17.0 40 / 45 16.5
17.5 40 / 45 17.0
18.0 45 / 51 17.5
18.6 40 / 45 18.0
19.1 45 / 51 18.5
19.6 45 / 51 19.0
20.1 50 / 55 19.5
20.6 45 / 50 20.0
21.1 50 / 55 20.5
21.7 50 / 55 21.0
22.1 50 / 58 21.5
22.7 45 / 50 / 58 22.0
23.1 50 / 58 / 61 22.5
23.7 50 / 58 23.0
24.1 50 / 58 23.5
24.7 50 / 58 24.0
25.1 55 / 61 24.5
25.8 50 / 55 / 61 25.0
26.8 55 / 61 26.0
27.8 55 / 61 27.0
28.8 55 / 63 28.0
29.8 55 / 63 29.0
30.9 55 / 60 / 65 30.0
31.9 60 / 65 31.0
32.9 60 / 65 32.0
33.9 60 / 65 33.0
34.9 60 / 65 34.0
35.9 60 / 65 35.0
36.9 60 / 65 36.0
37.9 60 / 65 37.0
38.9 60 / 65 38.0
39.9 60 / 65 39.0
40.9 60 / 65 40.0
42.9 65 42.0
43.9 65 43.0
45.9 70 45.0
 

    we are quite confident on offering guarantee on our product and services by emphasizing carbide cutting inserts and tools for modern industries.

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 :  NO 777,Haike Road,Cross-Strait Industrial Park,Wenjiang 611130,Chengdu,China
 :  sales@konetool.com 
 :  +86-28-8263-1918 
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