thread drilling bit from China T38 dia76mm

thread drilling bit from China T38 dia76mm System 1

thread drilling bit from China T38 dia76mm System 2

thread drilling bit from China T38 dia76mm

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 20 pc

Supply Capability:: 10000 pc/month

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We are specialized in rock drilling tools，such as taper button bit, thread button bit, Integral drill rod, DTH bit, DTH hammer, Air leg rock drill, Excavator Mounted rock driling and splitter, expansive mortar.

Product:

Thread Button Bits: High quality and several thread with various carbide tips like YK05 are available. All products can be developed upon customers' request. Premium designs and steel and premium tungsten carbide insert grade T6 supplied by Boart Long year, Offers industry-leading strength and penetration rates for more productivity, Excellent straightness and hole clean quality, Get max. drilling performance for rock drills with long life to save up fuel cost rate.

thread drilling bit from China T38 dia76mm

Description of button bit:

Our company supply all kind of button bits with Rope thread

R32-43MM, R32-45MM, R32-51, R32-64, R32-76;

T38-64, T38-76MM, T38-89, T38-102MM;

T45-76MM, T45-89MM, T45-102MM;

T51-89MM, T51-102MM, T51-127MM etc.

all face design, flat face, drop-center face, normal body and retrac body.more

Specification of button bit:

Thread	Diameter range	Skirt Design	Face Design	Button Design
R22	35 – 45mm	Normal	Flat Face Drop Centre	Hemispherical Ballistic
R25	33 – 57mm	Normal	Flat Face Drop Centre	Hemispherical Ballistic
R28	36 – 51mm	Normal	Flat Face Drop Centre	Hemispherical Ballistic
R32	41 – 89mm	Normal Retrac	Flat Face Drop Centre	Hemispherical Ballistic Conical
R35	48 – 51mm	Normal Retrac	Flat Face Drop Centre	Hemispherical Ballistic Conical
R38	64 – 102mm	Normal Retrac	Flat Face Drop Centre	Hemispherical Ballistic Conical
T38	57 – 102mm	Normal Retrac	Flat Face Drop Centre	Hemispherical Ballistic Conical
T45	70 – 127mm	Normal Retrac	Flat Face Drop Centre	Hemispherical Ballistic Conical
T51	76 – 140mm	Normal Retrac	Flat Face Drop Centre	Hemispherical Ballistic Conical
T60	89 – 140mm	Normal Retrac	Flat Face Drop Centre	Hemispherical Ballistic Conical
ST58	89 – 140mm	Normal Retrac	Flat Face Drop Centre	Hemispherical Ballistic Conical
GT60	93 – 140mm	Normal Retrac	Flat Face Drop Centre	Hemispherical Ballistic Conical
ST68	102 – 152mm	Normal Retrac	Flat Face Drop Centre	Hemispherical Ballistic Conical

thread drilling bit from China T38 dia76mm

Company Profile:

CNBM is the largest state-owned enterprise in China building material & equipment industry. Up until October of 2011, our total assets exceeded RMB 190 billion, with 130,000 employees and over 300 subordinate companies. In the year 2012, we are ranked as No. 365 in World Top 500 Enterprises by Fortune, and No. 2 in global building materials industry, second only to Saint-Gobain.

thread drilling bit from China T38 dia76mm

FAQ:

1. Q: Can I get some samples?

A: We are honored to offer you samples for quality check.

2. Q: Do you have the products in stock?

A : Yes , We have sample for several models now could supply to you.

3. Q: What’s the delivery time?

A: It usually takes about 25 days to produce an order. But the exact delivery time might be different for different orders or at different time.

4. Q: Can I mix different models in one container?

A: Yes, different models can be mixed in one container, but the quantity of each model should not be less than MOQ.

5. Q: How does your factory do regarding quality control?

A: Quality is priority. Rock drilling tools workers always attach great importance to quality control from the every beginning to the end of the production. Every product will be fully assembled and carefully tested before it's packed for shipment.

6. Q: Will you deliver the right goods as ordered? How can I trust you?

A: Yes, we will. Our company is world top 500, that is the biggest supplier and manufacture in China, having a good reputation around the world.

7. Q: What's the payment you accept ?

A: As usual our payment is T/T, other payment can consider.

As the largest manufacturer and exporter of building materials in China, we avail ourselves of this opportunity to approach you for mutual-beneficial cooperation. If you want to know more, pls contact me freely.

Q:How do you drill a drill?: 2, drill clockwise in the same direction, drilling tail down about 10 degrees angle, sharpening;3, drill once rotated 30 degrees angle or slightly larger, pay attention not to sharpen all other cutting edge, grinding two or three times;The 4 supporting point does not change, and the drill rotates 180 degrees, with the same method sharpening all other cutting edges;5, after grinding, the drill will be vertical (to make it natural droop), and hold it in hand, check whether the grinding bit is symmetrical with its center line;In case of asymmetric grinding, the angle between the cross blade and the cutting edge should be 50 degrees --55 degrees;

Q:What steel blade drill bit, hardness above 60: It is recommended to use steel bit, two hundred to three hundred RPM (8mm below the hole, more than 8mm, and then reduce speed), pay attention to cooling, the amount of feed should not be too large. For reference only, I hope it will help you.

Q:What is a two center drill? What's the function?: There are two drill centers, one for passing through the bushing and one for reaming the center of diameter (the center line coincides with the center of the drill string)

Q:Cobalt containing special stainless steel drill bit, 4mm angle, do not move?: No matter what drill, the head must be sharpened! The small drill can be struck because the front edge is well sharpened! And 8.5 of the drill bit can not drill through, because the drilling side of the two cutting edges did not grind out (front angle is lower than the back angle, resulting in non cutting! To grind to the rear corner, lower than the front corner!!!!!!!!. When the drill bit blade grinding, drilling 4mm angle, is very fast, also don't add coolant! (head color change, drill when there is a cry, two sides do not chip out, all the drill bit did not wear well), grinding drill bit is a learning, learning is not difficult. Learn to grind the drill bit and drill around with the 10mm to see the edges.

Q:Drills, drills, heating drills, will they be annealed?: So in need of cutting fluid filling drilling, cutting fluid can take away a lot of heat cutting when cutting, cutting temperature, and the cutting fluid can penetrate into the workpiece, cutting tool, the lubricating film formed between the chip and the tool and the workpiece, can reduce the friction between the chip, thereby reducing the cutting deformation of bue growth inhibition. And the cutting fluid can be a small chip away to avoid clogging timely or scratch the workpiece machined surface, reduce the surface roughness value, reduce the thermal deformation of workpiece and ensure the machining accuracy and improve production efficiency.

Q:The maximum diameter of the hammer is fixed up? Can I open the hole? How does an electric drill screw in? How big is the drill bit?: Put the drill will bite at the top of the hand claw loosen, the drill bit is put into a plug in the end, and tighten with the special wrench, if the old hammer, was struck with an iron wedge bite claw hammer with teeth to tighten the drill.

Q:What is the maximum available drill bit for an electric drill with a maximum diameter of 10mm?: Of course, if it is not a cylindrical drill, but a hole opener, it can be as large as 100mm and open a round hole on a low density material such as a large board.

Q:Tap is M14-H2, drill with big bit: In practice, the thread material is different, the bottom diameter is different: Iron and steel parts are different, coarse and fine teeth are not the same, the habit of hand tapping and drilling tapping are not the same. Standard pitch M14 thread is 2, so the threaded hole diameter of 12, to select 12.20 pieces of steel, there are two kinds of specifications of fine teeth: a pitch of 1.50 or 1, the corresponding threaded hole diameter is 12.60 and 13.10.

Q:M3 threaded hole. The bottom should choose large diameter drill bit: What do you not know about screw diameter reduction? M3 the pitch is 0.5, that is, 3-0.5=2.5.. If it is a piece, it can be larger. Choose 2.55 to 2.6 of the drill bit. All other materials are 2.5.

Q:Why do you always burn drills?: The drill is so small, but the depth is very shallow, so this speed can be, the knife can be calculated in accordance with the formula, appropriate to adjust the actual situation of cutting. I believe it will help you.

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