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120° hss Center Drill Bits Accurate Centering Strong Universality

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120° hss Center Drill Bits Accurate Centering Strong Universality

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Brand Name :	BWIN
Model Number :	A6
Price :	Negotiable
Payment Terms :	T/T, Western Union,
Supply Ability :	1-10000pcs 7days
Delivery Time :	7 work days

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120° hss Center Drill Bits Accurate Centering Strong Universality

Hss Twist 4341 Hss Tungsten Carbide Drill Bit Imperial Small Handle Fast Drilling Flute

Tungsten Carbide Drill Bits Center HSS A Type A0.6-A10 Straight Shank 120°

Quick Detail:

Industrial grade high-speed steel
German process high precision
Tough, durable and long life
Accurate and convenient centering
Sharper and more wear-resistant

Description:

High quality 6542HSS material. Extended tool life and wear resistance
Full grinding edge design, smooth drilling without residue
Wide spiral chip removal groove design, smooth chip removal, conducive to medium and high speed machining
Precision grinding 120 ° double edge rear angle, sharp cutting, high efficiency

Specifications:

Brand	BWIN
Model	Tungsten Carbide Drill Bits For Machine Tools
Workpiece	Cast iron/Steel /Stainless steel /Aluminum /copper
Type	Nail Tungsten Carbide Drill Bits
Material	Tungsten Carbide Drill Bits
Processing Type	Medium Cutting
Feature	Industrial grade high-speed steel
	German process high precision
	Tough, durable and long life
	Accurate and convenient centering
	Sharper and more wear-resistant
Standard	ISO
Quantity	1pcs/box
Surface Finish	Black Oxide (Black White, Gray Bright)
Package	Plastic Box
Customized Support	OEM, ODM

Lead Time:

antity(pieces)	1 - 3000	>3000
Lead time (days)	7	To be negotiated

Parameter:

3D/5D External Cooling Cutting Parameters

Processed materials	Mild steel HB≤180		Prehardened steel -40HRC		stainless steel		cast iron		aluminium alloy		heat-resisting alloy

vc/(m/min)	60~120m/min		40~70m/min		25~40m/min		60~120m/min		60~14m/min		15~25m/min
D(mm)	N (min)	F (mm/r)	N (min)	F (mm/r)	N (min)	F (mm/r)	N (min)	F (mm/r)	N (min)	F (mm/r)	N (min)	F (mm/r)

2	14000	0.06~ 0.08	9500	0.06~ 0.08	5500	0.02~ 0.05	14000	0.06~ 0.08	16000	0.06~ 0.08	3200	0.02~ 0.04

3	9500	0.09~ 0.12	6300	0.09~ 0.12	3700	0.03~ 0.07	9500	0.09~ 0.12	10600	0.09~ 0.12	1200	0.03~ 0.06

4	7000	0.10~ 0.15	4700	0.10~ 0.15	2700	0.04~ 0.08	7000	0.10~ 0.15	8000	0.10~ 0.15	1600	0.04~ 0.07

5	5700	0.12~ 0.18	3800	0.12~ 0.18	2200	0.05~ 0.10	5700	0.12~ 0.18	6400	0.12~ 0.18	1250	0.05~ 0.09

6	4700	0.14~ 0.20	3100	0.14~ 0.20	1850	0.06~ 0.12	4700	0.14~ 0.20	5300	0.14~ 0.20	1050	0.06~ 0.11

8	3600	0.16~ 0.24	2400	0.16~ 0.24	1400	0.08~ 0.16	3600	0.16~ 0.24	4000	0.16~ 0.24	800	0.08~ 0.14
10	2800	0.18~ 0.27	1900	0.18~ 0.27	1100	0.18~ 0.27	2800	0.27~ 0.18	3200	0.18~ 0.27	600	0.10~ 0.16

12	2400	0.20~ 0.3	1600	0.20~ 0.3	930	0.12~ 0.20	2400	0.20~ 0.3	2700	0.20~ 0.3	500	0.12~ 0.18

14	2100	0.22~ 0.35	1400	0.22~ 0.35	800	0.13~ 0.22	2100	0.22~ 0.35	2300	0.22~ 0.35	450	0.13~ 0.2

16	1800	0.25~ 0.36	1200	0.25~ 0.36	700	0.25~ 0.36	1800	0.25~ 0.36	2000	0.25~ 0.36	400	0.14~ 0.23

18	1600	0.28~ 0.38	1100	0.28~ 0.38	620	0.28~ 0.38	1600	0.28~ 0.38	1800	0.28~ 0.38	350	0.15~ 0.25

20	1400	0.30~ 0.4	950	0.30~ 0.4	550	0.30~ 0.4	1400	0.30~ 0.4	1600	0.30~ 0.4	320	0.16~ 0.28

3D/5D internal cooling cutting parameter

Processed materials	Mild steel HB≤180		Prehardened steel -40HRC		stainless steel		cast iron		aluminium alloy		heat-resisting alloy

vc/(m/min)	60~120m/min		40~70m/min		25~40m/min		60~120m/min		60~14m/min		15~25m/min
D(mm)	N (min)	F (mm/r)	N (min)	F (mm/r)	N (min)	F (mm/r)	N (min)	F (mm/r)	N (min)	F (mm/r)	N (min)	F (mm/r)

3	12700	0.09~ 0.12	7400	0.09~ 0.12	6300	0.03~ 0.07	12700	0.09~ 0.12	15000	0.09~ 0.12	1200	0.03~ 0.06

4	9600	0.10~ 0.15	5600	0.10~ 0.15	4700	0.04~ 0.08	9600	0.10~ 0.15	11000	0.10~ 0.15	1600	0.04~ 0.07

5	7600	0.12~ 0.18	4500	0.12~ 0.18	3800	0.05~ 0.10	7600	0.12~ 0.18	9000	0.12~ 0.18	1250	0.05~ 0.09

6	6400	0.14~ 0.20	3700	0.14~ 0.20	3200	0.06~ 0.12	6400	0.14~ 0.20	7400	0.14~ 0.20	1050	0.06~ 0.11

8	4800	0.16~ 0.24	2800	0.16~ 0.24	2400	0.08~ 0.16	4800	0.16~ 0.24	5600	0.16~ 0.24	800	0.08~ 0.14
10	3800	0.18~ 0.27	2200	0.18~ 0.27	1900	0.18~ 0.27	3800	0.27~ 0.18	4500	0.18~ 0.27	600	0.10~ 0.16

12	3200	0.20~ 0.3	1900	0.20~ 0.3	1600	0.12~ 0.20	3200	0.20~ 0.3	3700	0.20~ 0.3	500	0.12~ 0.18

14	2700	0.22~ 0.35	1600	0.22~ 0.35	1350	0.13~ 0.22	2700	0.22~ 0.35	3200	0.22~ 0.35	450	0.13~ 0.2

16	2400	0.25~ 0.36	1400	0.25~ 0.36	1200	0.14~ 0.25	2400	0.25~ 0.36	2800	0.25~ 0.36	400	0.14~ 0.23

18	2100	0.28~ 0.38	1200	0.28~ 0.38	1050	0.15~ 0.28	2100	0.28~ 0.38	2500	0.28~ 0.38	350	0.15~ 0.25

20	1900	0.30~ 0.4	1100	0.30~ 0.4	950	0.16~ 0.30	1900	0.30~ 0.4	2300	0.30~ 0.4	320	0.16~ 0.28

When using this tungsten carbide drill bits for the first time, try to cut at 90% of the cutting speed or 85% of the feed speed according to the above data, and then increase the cutting speed and feed rate one by one after the cutting condition is stable
This standard cutting condition is applicable to water-soluble cutting fluid
When installing the tool, please use a clean chuck with defects removed, and control the radial runout of the drill bit within 0.02mm
The cutting conditions in this table are applicable to situations with hole depth below 5D

Notice:

1. Type A central tungsten carbdie drill bits are a cutting tool and is mainly used for metal drilling. Users must reasonably select the type of central drill according to the hole type and ruler size of the parts to be processed

2. The hardness of Type A central tungsten carbdie drill bits is 62-64 degrees, which can be used to process steel parts and stainless steel

3. Before the tool is used, the anti rust grease must be cleaned to prevent chips from sticking to the blade and affecting the cutting performance

4. The surface of the workpiece to be machined shall be straight without sand holes or hard spots to avoid damage to the tool

5. Precautions: In case of any abnormal condition during processing, stop processing immediately, find out the cause before processing, and pay attention to the wear of the cutting edge for timely repair; Clean the oil stain on the surface of the tool after use and keep it properly

6. This product can be reground for use

Applications:

Our tungsten carbide drill bits could to be processed Alloy steel, Tool steel, carbon steel, stainless steel, Cast iron and Titanium alloy. Working material as following:

120° hss Center Drill Bits Accurate Centering Strong Universality

FAQ

Q1. Excessive aperture

Reasons: 1. The cemented carbide drill is not well clamped, and the runout of the spindle itself is too large

2. Asymmetrical sharp angle, excessive blade height difference, eccentric cross blade

Solution: 1. select high-quality tool handle and fixture, calibrate the spindle, and carefully measure and adjust each time the drill is clamped

2. Re sharpen and correct, and check the accuracy after sharpening

Q2. Poor consistency of aperture

Reasons: 1. Asymmetrical sharp angle, too large difference in blade height, eccentric transverse edge, and too much wear on edge surface

2. The cemented carbide drill bit is not properly clamped, the runout of the spindle itself is too large, and the workpiece is not firmly clamped

3. Excessive feed speed

4. Insufficient cutting fluid supply

Solution: 1. Re sharpen the drill and check the accuracy after sharpening

2. Select a good tool handle and fixture, calibrate the spindle, and carefully measure and adjust each time the drill is clamped

3. Reduce the feed speed of cemented carbide drill

4. Change the cutting fluid supply method and increase the flow).

Q3. Poor hole straightness and verticality

Reasons: 1. Excessive tool wear

2. Asymmetrical sharp angle, excessive blade height difference, eccentric cross blade

3. Insufficient rigidity

4. Uneven cutting plane

Solution: 1. Re sharpen

2. Re sharpen and correct, and check the accuracy after sharpening

3. Improve the rigidity of machine tools, jigs, cemented carbide drills, etc

4. Check the levelness of the pre machined surface

Q4. Poor hole location and poor consistency of center distance

Reasons: 1. The drill bit is not properly clamped, and the spindle itself has excessive runout

2. Deviation during cutting

3. Machine tool accuracy loss

4. The centering effect of cemented carbide bit is poor, and the cross edge is eccentric

Solution: 1. select a good tool handle and fixture, calibrate the spindle, and carefully measure and adjust each time the drill is clamped

2. Improve the rigidity of the cutter and machine tool, and the rigidity of the workpiece and fixture. Use the drill type with good cutting performance, and check the levelness of the cutting surface

3. Check the accuracy of the machine tool

4. Re sharpen the carbide bit, and check the accuracy after sharpening

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