HSS Roll-Forged Black Finish Twist Drill Bit

• Customized: Non-Customized
• Standard: Many
• Length: as Per Customer
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: GMA10000
• Type: Twist Drill Bit
• Material: High Speed Steel
• Usage: Metal Drilling
• Size: Available
• Delivery Time: 15-35 Days
• Free Sample: Available
• Inch Size: Available
• Surface Treatment: Black
• MOQ: 1PC
• Transport Package: Adjustment According to Customers′ Requirements
• Specification: all sizes are available
• Trademark: GOLDMOON
• Origin: Danyang
• HS Code: 82075090
• Production Capacity: 2 Million PCS Per Month

Product Description

Product Description

Production standard: DIN338      
     
Process: roll-forged            

Point angle: 118 degree      
     
Material: HSS4241, HSS4341,  HSS6542(M2)  
         
Surface: Black finish      
     
Packing: neutral PVC bag, envelope bag, plastic wallet,plastic box (with/without hanger),shrink card, double bliser card etc.     
       
Application: For drilling steel, cast steel, grey cast iron, malleable iron, sintered metal,  and low hardness alloyed materials etc.  
         
BSCI certified            
            
Chemical composition            

Material	Component (%)
HSS 4241	C (0.9~1.0); Si(1.0~1.3); Mn(0.25~0.4); P(0~0.035); S(0~0.009);  Cr(3.8~4.2); Mo(0.55~0.85); W(1.6~2.0); V (0.4~0.65); Co(0)
HSS 4341	C (0.83~0.93); Si(0.2~0.4); Mn(0.2~0.4); P(0~0.03); S(0~0.009);  Cr(3.8~4.4); Mo(2.5~3.5); W(3.5~4.5); V (1.2~1.8); Co(0)
HSS 6542 (M2)	C (0.8~0.9); Si(0.2~0.45); Mn(0.15~0.4); P(0~0.03); S(0~0.009);  Cr(3.8~4.4); Mo(4.6~4.9); W(5.6~5.9); V(1.8~2.0); Co(0)
HSS 9341	C (0.77~0.87); Si(0.2~0.4); Mn(0.2~0.4); P(0~0.03); S(0~0.009);  Cr(3.8~4.4); Mo(2.7~3.3); W(8.5~9.5); V(1.3~1.7); Co(0)
HSS M35 (Co5%)	C (0.8~0.9); Si(0.2~0.45); Mn(0.15~0.4); P(0~0.03); S(0~0.009);  Cr(3.8~4.4); Mo(4.6~4.9); W(5.6~5.9);V(1.8~2.0); Co(4.6~4.9)

Specification (mm): 
D: diameter
L1: total length
L2: flute length

D	L1	L2		D	L1	L2		D	L1	L2
0.2	19	2.5		2.85	61	33		9.6	133	87
0.22	19	2.5		2.9	61	33		9.7	133	87
0.25	19	3		2.95	61	33		9.8	133	87
0.28	19	3		3	61	33		9.9	133	87
0.3	19	3		3.1	65	36		10	133	87
0.32	19	4		3.2	65	36		10.1	133	87
0.35	19	4		3.3	65	36		10.2	133	87
0.38	19	4		3.4	70	39		10.3	133	87
0.4	20	5		3.5	70	39		10.4	133	87
0.42	20	5		3.6	70	39		10.5	133	87
0.45	20	5		3.7	70	39		10.6	133	87
0.48	20	5		3.8	75	43		10.7	142	94
0.5	22	6		3.9	75	43		10.8	142	94
0.52	22	6		4	75	43		10.9	142	94
0.55	24	7		4.1	75	43		11	142	94
0.58	24	7		4.2	75	43		11.1	142	94
0.6	24	7		4.3	80	47		11.2	142	94
0.62	26	8		4.4	80	47		11.3	142	94
0.65	26	8		4.5	80	47		11.4	142	94
0.68	28	9		4.6	80	47		11.5	142	94
0.7	28	9		4.7	80	47		11.6	142	94
0.72	28	9		4.8	86	52		11.7	142	94
0.75	28	9		4.9	86	52		11.8	142	94
0.78	30	10		5	86	52		11.9	151	101
0.8	30	10		5.1	86	52		12	151	101
0.82	30	10		5.2	86	52		12.1	151	101
0.85	30	10		5.3	86	52		12.2	151	101
0.88	32	11		5.4	93	57		12.3	151	101
0.9	32	11		5.5	93	57		12.4	151	101
0.92	32	11		5.6	93	57		12.5	151	101
0.95	32	11		5.7	93	57		12.6	151	101
0.98	34	12		5.8	93	57		12.7	151	101
1	34	12		5.9	93	57		12.8	151	101
1.05	34	12		6	93	57		12.9	151	101
1.1	36	14		6.1	101	63		13	151	101
1.15	36	14		6.2	101	63		13.1	151	101
1.2	38	16		6.3	101	63		13.2	151	101
1.25	38	16		6.4	101	63		13.3	160	108
1.3	38	16		6.5	101	63		13.4	160	108
1.35	40	18		6.6	101	63		13.5	160	108
1.4	40	18		6.7	101	63		13.6	160	108
1.45	40	18		6.8	109	69		13.7	160	108
1.5	40	18		6.9	109	69		13.8	160	108
1.55	43	20		7	109	69		13.9	160	108
1.6	43	20		7.1	109	69		14	160	108
1.65	43	20		7.2	109	69		14.25	169	114
1.7	43	20		7.3	109	69		14.5	169	114
1.75	46	22		7.4	109	69		14.75	169	114
1.8	46	22		7.5	109	69		15	169	114
1.85	46	22		7.6	117	75		15.25	178	120
1.9	46	22		7.7	117	75		15.5	178	120
1.95	49	24		7.8	117	75		15.75	178	120
2	49	24		7.9	117	75		16	178	120
2.05	49	24		8	117	75		16.25	184	125
2.1	49	24		8.1	117	75		16.5	184	125
2.15	53	27		8.2	117	75		16.75	184	125
2.2	53	27		8.3	117	75		17	184	125
2.25	53	27		8.4	117	75		17.25	191	130
2.3	53	27		8.5	117	75		17.5	191	130
2.35	53	27		8.6	125	81		17.75	191	130
2.4	57	30		8.7	125	81		18	191	130
2.45	57	30		8.8	125	81		18.25	198	135
2.5	57	30		8.9	125	81		18.5	198	135
2.55	57	30		9	125	81		18.75	198	135
2.6	57	30		9.1	125	81		19	198	135
2.65	57	30		9.2	125	81		19.25	205	140
2.7	61	33		9.3	125	81		19.5	205	140
2.75	61	33		9.4	125	81		19.75	205	140
2.8	61	33		9.5	125	81		20	205	140

Remark: Inch size also supplied

Detailed Photos

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Why choose us

FAQ

Q: What can we provide ?

A: We are a professional manufacturer of hole saw and have our own packing centre. Through more than 10 years of effort, we have worked together with many good manufactuers of different tools as an exclusive tool club. We can provide our factory direct price for a vast range of products, including power tool accessories, hand tools, combination kits, etc.

Q:What is the shipping port?

A: We ship the goods via Shanghai port.

Q:How about the sample?

A: The samples will be sent to you via express and arrive in 3-5 days. You can use your own express account or prepay us if you do not have an account

Q:How do you control the quality?

A: We will make samples before mass production, and mass production will be arranged after samples approved. Doing 100% inspection during production, then do random inspection before packing, taking pictures after packing.

Shipping way

1. Small quantity: by international air express, within 3-7days arriving

2. Large quantity: by ocean cargo, arriving time depends on customers destination

Our service

1. 24hours online technical support (telephone and email)

2. 100% Satisfaction Guarantee

3. Engineers are available

Please contact with me when you gonna order,we will answer back ASAP.