Specifications

1.17 pcs drill bit set
2.Available in HSS Cobalt
3 Different surface coatings are available.
4.DIN338 standard

17PCS HSS Drill Bit Set

 

1.17pcs drill bit set with metal box packing 
2.Available in HSS Cobalt,  HSS
3 Different surface coatings are available.
4.DIN338 standard drill bits. 

 

 

 

Believe it or not, there’s a drill bit make for almost every application. Using the right drill bits can make almost every any home improvement project easier.

Tongyu Tools help to determine which drill bit is the best fit for your drill and your project. 

 

 

 

The material from which bits are manufactured play a big role in the life and performance of the bit. Drill bits are available in : 

 

High speed steel (HSS): harder than steel blades; stay sharper longer. 

HSS Cobalt: Extremely hard and dissipate heat quickly. They are most commonly used for boring in stainless steel and other metals. 

 

We can supply the following HSS grade: 

HSS  GRADE	HRC	CHEMICAL COMPOSITION (%)					International	DIN	ASTM	JIS
		C	W	Mo	Cr	V
W4Mo2Cr4VSi(4241)	60-62	0.9-1.0	1.5-2.5	0.5-1.2	3.8-6.0	0.5-1.0	T-4241	/	/	/
W4Mo3Cr4V(W4341)	62-65	0.88-0.98	3.5-4.5	2.5-3.5	3.8-4.4	1.3-1.7	4341	W4	/	/
W9Mo3Cr4V(W9341)	63-66	0.77-0.87	8.5-9.5	2.7-3.3	3.8-4.4	1.3-1.7	9341	W9	/	/
W6Mo5Cr4V2(M2)	63-66	0.8-0.9	5.5-6.75	4.5-5.5	3.8-4.4	1.75-2.2	6542	M2	M2	SKH51
W6Mo5Cr4V2Co5(M35)	64-67	0.9-0.95	5.5-6.5	4.5-5.5	3.8-4.4	1.75-2.2	Co5%	M35	M35	SKH55
W2Mo9Cr4V Co8 (M42)	66-68	1.05-1.15	1.15-1.85	9.0-10.0	3.5-4.25	0.95-1.35	Co8%	M42	M42	SKH59

 

 We can supply the following different workmanship 

Roll Forged
Harf Ground
Fully Ground
Milled

 

Suitable Standard

Roll Forged	a.DIN338  b,DIN340  c, Jobber Length
Harf Ground	a.DIN338 b.DIN340 c.DIN1897 d.Jobber Length
Fully Ground	a.DIN338 b,DIN340 c,DIN1897 d,Aircraft Extension e, Jobber Length
	f,Taper Length g,Screw Machine Length
Milled	a.DIN340 b,DIN1869 c,Aircraft Extension d,Extra Length

 

We can supply the following standard. 

Straight Shank Series	1. DIN338    2. DIN340
	3. DIN1897  4. DIN1869
	5. Jobber Length    6. Aircraft Extension
	7. Taper Length     8. Screw Machine Length
	9. Extra Length
Taper Shank Series	5. DIN341
	6. DIN345

 

 

1.21pcs twist drill bit set with metal box. 
2.Available in HSS Cobalt, HSS
3 Different surface coatings are available.
4.DIN338 standard twist drill bit

 

Material	HSS-Co5%, HSS6542, HSS4341, HSS4241
Workmanship	Rolled, Fully ground.
Surface coating	1. Black finished
	2. Edge ground
	3. Edge ground Tin-coated
	4. Fully ground bright
	5. Fully ground black finished
	6. Fully ground Tin-coated.
Angle point	118~135 degree or 135 degree split point
Size	1.0, 1.5,2.0, 2.5, 3.0,3.2,3.5,4.0,4.2,4.5,5.0,5.5,6.0,6.5
	7.0,7.5,8.0,8.5,9.0,9.5,10.0
Item NO.	TY11-1.1.8.7

 

 

 

 

Size:	1.0~13.0*0.5mm+3.2mm, 4.2mm
Packing:	Inner: Metal box with window
	outer: Caton.
N.W./G.W.	18/19KGS
Meast:	45*29*20cm

 

  

 

TONGYU's philosophy is based on three principles: safety, efficiency and precision.

 

Pls. contact us freely for more information, I will reply you ASAP!

 

Hope you will enjoy a comfortable cooperation with us!