Features:
1.Premium 40Cr steel with heat treatment improves core strength for maximum durability and extended life.
2.Hardened, premium carbide insert tip is strong and stays sharp longer for finer material break up and easier drilling.increases strength and durability.
3.Copper braze material gives high heat resistance for reduced tip loss,Carbide tip securely embedded in the steel body.
4.fold spiral flute (S4) for rapid drilling dust removal. With even less vibration and more precise guiding, the stability and service life of the drill bit are increased.
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Size（mm）
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Size（mm）
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18*280
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18*400
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19*280
|
19*400
|
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20*280
|
20*400
|
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22*280
|
22*400
|
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23*280
|
23*400
|
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24*280
|
24*400
|
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25*280
|
25*400
|
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28*280
|
28*400
|
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30*280
|
30*400
|
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32*280
|
32*400
|
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35*280
|
35*400
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18*320
|
18*450
|
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19*320
|
19*450
|
|
20*320
|
20*450
|
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22*320
|
22*450
|
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23*320
|
23*450
|
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24*320
|
24*450
|
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25*320
|
25*450
|
|
28*320
|
28*450
|
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30*320
|
30*450
|
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32*320
|
32*450
|
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35*320
|
35*450
|
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18*340
|
18*500
|
|
19*340
|
19*500
|
|
20*340
|
20*500
|
|
22*340
|
22*500
|
|
23*340
|
23*500
|
|
24*340
|
24*500
|
|
25*340
|
25*500
|
|
28*340
|
28*500
|
|
30*340
|
30*500
|
|
32*340
|
32*500
|
|
35*340
|
35*500
|
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18*370
|
18*520
|
|
19*370
|
19*520
|
|
20*370
|
20*520
|
|
22*370
|
22*520
|
|
23*370
|
23*520
|
|
24*370
|
24*520
|
|
25*370
|
25*520
|
|
28*370
|
28*520
|
|
30*370
|
30*520
|
|
32*370
|
32*520
|
|
35*370
|
35*520
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