HSS rail cutter DRHX-2 D.O.C. 25&50mm

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‍‍DRHX-2&4 ‍‍

‍‍D.O.C. 25&50mm‍‍

‍‍◎ Made of super tough high speed steel , superiorly-designed geometry for better endurance

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‍‍◎ Supply Φ19.0mm and Φ19.05mm weldom shank

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‍‍◎ Applicable to hole cutting on railtrack , like PD3‍‍‍

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Q:How do you determine the speed of the drill? Is there any standard?: The diameter of 2mm twenty thousand to 40mm 32 is mainly to see the diameter of iron chip is not sent out only primary coke is not a piece of burning speed is too high to slow down a block that feed enough that need grinding head shaking feed you attached to a long amount of iron is the thickness of it feed processing when you need cooling water;

Q:How to change the drill bit of impact electric drill?: Remove the drill: the impact drill upside down on the ground (bit upward), left hand holding down the drill root plastic ring, right hand holding the drill bit upward, provided when rotating around a bit can be taken out.

Q:New drills usually need sharpening before they can be used. Why?: What you say does not exist, the new drill is not heavy grinding can be used; cutting edge is yes, the front angle is the drill bit of the spiral groove angle, it is impossible without the front angle, and the back angle is not 0 degrees, the peak angle is not big. It's only in the drilling that produces what I said before, so it's time to rub it again and use it again.

Q:For 25 bit is much with the expansion screw: For 25 bit is much with expansion screws, fasteners consultant Yu Wenlong think for 25 bit M20 with expansion screws.

Q:What drill holes are used in stainless steel basins?: The cutting fluid is concentrated with emulsion. Stainless steel is not a high hardness, is a stronger toughness, while processing with some cooling oil drilling.

Q:M6 screws should drill big holes: M6 screw, installation of air hit 6.5~7 mm in diameter was 5 mm drill tapping hole.After the general drilling drill hole due to beating, slightly more.

Q:What kind of steel do you need to drill?!: Drills are usually made of cemented carbide. The so-called carbide is based on tungsten carbide powder as a matrix, cobalt powder as binder, by compression and sintering. Usually containing tungsten carbide 94%, cobalt containing 6%. Because of its high hardness, very wear-resistant, has a certain strength, suitable for high-speed cutting. But the poor toughness, very brittle, in order to improve the performance of the hard alloy, with some hard carbide titanium carbide substrate in chemical vapor deposition of a layer of 5 to 7 microns (TIC) or titanium nitride (TIN), which has higher hardness.

Q:Drill hammer type matching specifications: Four, five, six pit pit angle shank hammer respectively with four pits, five pits, six angle shank drill.

Q:Which is better, a white drill or a black drill?: Another is between white and amber. Or above amber. This type of drill is called titanium drill, divided into decorative plating and plating industry. Decorative plating don't have any effect, is good-looking, golden. Very good industrial plating, hardness can reach HRC65 degrees, higher than cobalt drilling hardness (HRC54 degrees).

Q:Who can do this? Put the drill into it: Change the hammer and steel ball to the service point. 3, time does not need, may not plug in, according to 1 of the method of force a few times just fine

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