8d High Efficiency Solid Carbide Twist Drill Bit with Inner Coolant Hole

• Customization: Available
• Length: 38-330mm
• Type: Twist Drill Bit
• Model NO.: eitfs3561
• Material: Tungsten Carbide
• Usage: Wood Drilling, Well Drilling, PCB Drilling, Metal Drilling, Masonry Drilling
• Flute Diameter: 0.3-40mm
• Dia Size: 4mm-40mm
• Precision: 0.005~-0.01mm
• Over All Length: 38-330mm
• HRC: 45/55/60/65HRC
• Flute: 2/3
• Suitable for: Coper.Cast Iron.Carbon Steel.Mould Steel
• Controlling Mode: CNC System
• Use: Metal Drilling
• Transport Package: Each Piece with Plastic Box in Carton.
• Trademark: eitfs
• Origin: China
• Production Capacity: 3000 Piece/Pieces Per Month

Product Description

8D High Efficiency Solid Carbide Twist Drill Bit With Inner Coolant Hole

About Us:

Changzhou Aitefasi Tool Co., Ltd. founded in 2004, is a high-tech manufacturer specialized in providing High-performance carbide cutting tools. Many high-performance equipments which are from Germany, USA and Switze produce high-quality cnc tools, including:

1. Tungsten Solid Carbide Drill Bits
Inner coolant and outer coolant drill bits.
Support 3XD, 5XD, 8XD, 20XD, even more length and customized accepts.
Twist drill, center drill, bottom drill and other types of drill bits.

2. Tungsten Solid Carbide End Mill
Square end mill, ball nose end mill and other end mills.

3. Tungsten Solid Carbide Reamer
Twist and straight flute, with high precision and long life.

4. Customized CNC Toolings
Customized as requirements, ODM & OEM accepts.



Products Function:
 

Raw Material	Carbide, Tungsten Cobalt Alloy, tungsten carbide
Coating	AlTiN, TiAlN, TiSiN, AlTiSiN, TiN, Nano, or as your requirements
Overall Length	38-330mm (customized is acceptable)
Flute Diameter	0.3-40mm (customized is acceptable)
Diameter	4-40mm (customized is acceptable)
Precision	0.005-0.01 (high precision)
HRC	45/50/55/65 HRC
Controlling Mode	cnc tooling system
Processing Type	Finishing Maching
Suitable for	wood, cast iron, carbon steel, mould steel, stainless steel, titanium alloy, tool steel, and heat-treated steel, etc

Products Features:

1. Special Designed Drill Tip: Special designed drill tip will increase the Centering Ability and Chip breaker ability. Thus, the processing efficiency will be increased.

2. Much Sharper Cutting Edge: The much sharper cutting edge can decrease the cutting resistance and and torque. The lifetime of tools and machines will be longer.

3. Heat-resistant Coating: With highly heat-resistant HELICA/ALTIN coating, can be used for high-speed processing.

4. Smooth and Wide Flute:Smooth and wide flute will remove the cuttings more easily.

5. High Quality Raw Material: The raw material is used of high toughness, grain-sized carbon tungsten.

6. Polished Surface Treatment: With high polished surface treatment, the friction coefficient could be reduced, the lathe efficiency could be improved, more production time could be saved.

Products Detail:
 

Solid Carbide Inner Coolant Drill Bit-8D
d1	d2	L1	L2	L3	L4	Coolant solution
4.00-4.00	4	75	45	42	28	Inner Coolant
4.50-5.00	6	90	54	50	36	Inner Coolant
5.50-6.00	6	97	60	57	36	Inner Coolant
6.50-6.50	8	106	69	66	36	Inner Coolant
7.00-8.00	8	116	79	76	36	Inner Coolant
8.50-9.00	10	131	90	87	40	Inner Coolant
9.50-10.00	10	139	98	95	40	Inner Coolant
10.50-11.00	12	155	109	106	45	Inner Coolant
11.50-12.00	12	163	117	114	45	Inner Coolant
12.50-14.00	14	182	136	133	45	Inner Coolant
14.50-16.00	16	204	155	152	48	Inner Coolant
16.50-18.00	18	223	174	171	48	Inner Coolant
18.50-20.00	20	244	193	190	50	Inner Coolant
20.00-25.00	25				56	Inner Coolant
Customized Tools are Acceptable

Why Choose Us?

1. Chip breaker ability



2. Perfect oxidation resistance in high temperature 1100ºC



3. Abrasion condition of side cutting edge after processing 60m



4. Abrasion condition of top cutting edge after processing 60m



What We Have?

1. Imported production equipment

2 sets "Walter HP" from Germany, specializing in manufacture large diameter tools; 
1 set "Walter Micro"from Germany,specializing in manufacture Micro diameter tools;
2 sets Schutte Wu 305 Linear from German;
2 sets Star PTG6 from USA;
2 sets "Rollomatic GrindSmart628XS" high precision grinding machine from Switzerland; 
1 set Rollomatic NP5 from Switzerland.

2. Imported inspection equipment

1 set URMA digiset 3 tool measuring equipment from Switzerland;
2 sets PG 1000 tool measuring equipment testing the point of drill bit from USA;
1 set Mitutoyo Laser Scan Micrometer Equipment.



3. Strict quality control

Strict quality control process covers every step of production from the raw materials to the finished product, and provide strict quality warranty.



Certification:



Exhibition:



Package & Delivery:



FAQ:

Q1. What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages before you do the rest payment.

Q2. What are your terms of delivery?
A: EXW, FOB, CFR, CIF, ETC.

Q3. How about your delivery time?
A: Generally, It will take 10-15 days after receiving your advance payment. The specific delivery time depends on theitems and the quantity of your order.

Q4. Do you provide samples? is it free or extra?
A: Yes, we could offer our stock sample for free charge and you please pay the cost of freight.
custom cutting tools negotiated then we will quote the best sample cost.