HSS Centre Drill

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hss centre drill


2.Surface treatment: bright finish

3.Size: 1.0-5.0,3/16-7/16

Center drill.Easy cutting with high speed and excellent offtake of chips.

Suitable for products with straight flute oblique flute and sprial flute etc.

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Q:How do you choose the tolerance of reaming when reaming?
The processed reamer size with many factors, such as what the coolant, cutter speed, feed rate, exit reamer also pay attention to.The standard reamer is generally the axis system size. Such as H8, H7, H6. Of course, also can according to the hole size to build special dimensions and tolerances of the reamer.The theory of pore size is negative to wring size zero. But the actual wring hole must be more than theory. General tolerance of hole is smaller, the precision is higher.The general processing speed is slower, the cooling liquid, fully feed more quickly, the size of the hole is out of tolerance near.High strength high speed steel and hard alloy can be used as tool materials when reaming high strength steel and ultra high strength steel. High speed, high cobalt, cobalt or aluminium containing high speed steel in high performance high speed steel is very suitable for processing this kind of steel. For example, a reamer made of cobalt carbide super high speed steel W12Mo5Cr4V3Co5Si is 18mm in diameter,When reaming high strength steel (b=1200 to 1300MPa), each reamer can be reamed with 60~70 holes. When the hinge is n=140r / min, f=0.05mm / R, the roughness is Ra, 1.6gm.Carbide reamers for high strength steel, shown in Figure 4-4, are made of YT15 carbide. The reamer for L/D is less than or equal to 5 and D=6 to 80mm hole. Full use of emulsion when in use. If a drill bush is used, the rotary drill sleeve must be used to avoid the friction between the hinge blade and the drill sleeve. When the operation, the first contact with the workpiece after the tool and then drive, the best time to stop the car when the knife is returned.
Q:Can the machine reamer be installed on the milling machine?
Look at what milling machine you use and what knife clips, such as my milling machine can be. You can ask the old man and try it yourself
Q:Cutting amount of reamer when reaming
The margin stayed large. The fine hinge was pushed through the surface. The last one was left with 3 wires. Gray iron emulsion is good, 45 turn, stop the knife.
Q:Why are the dimensions of the reamer larger than the size of the hole?
This is certainly bigger than hole cutting tool, the key is you choose how much allowance, allowance is processed in your material, to see if he had deformation like, generally with a diameter of 0.1 to about 0.15mm, is relatively good. Thank you
Q:Do reamers and drills for machining centers use one hilt?
Yes, but it depends on the accuracy of the machined holes.
Q:Machining center reamer reaming holes, big head, small head, bell shaped, this is what is the reason?
I said you are so talented! Leave 0.5 of the remaining material! More than 13 of the drill bit is taper shank drilling, 0.5 mm a specification. But our experience shows that all the following 4MM are left in excess of 0.1MM. 4MM more than 0.2MM remaining material. To help you develop the process; hit the center drill - with D8 drill THR through; - 13.5 drill reaming - using D8 milling round processing, inverted 13.8THR (through) - with D8 milling round processing, DEP (depth) 8MM as a guide. Dimensions are guaranteed to be around 13.95 with 14 reamer G81 instruction S120F100 plus coolant. Not in place, you cut me. There are reamer, you do not go grinding; kill you do not rub; 14 of the reamer should be welded machine reamers? You see, the front bevel is not a chamfer. It's a cutting edge. It's a guiding role. After grinding, it's almost useless. We can use a reamer for a long time. And did you see the deflection of the reamer on the tester? Machine reamers, yaw, no-load control in 0.02, you can easily guarantee to +0.01 to +0.015. Reamer S320, when used as a milling cutter? The reamer must not be twisted at high speed, while the iron is cut at high speed without enough time to remove it. Cause extrusion deformation; twisted holes are generally large and small. Generally speaking, you don't have any big problems with 1000/D. D is the reamer size
Q:Use and do not use the threaded hole reamer reamer, what do you mean, how to choose the aperture
Because the drill hole drilling accuracy is not high, the hole is rough, and the internal hole accuracy requirements are relatively high, reaming can improve the accuracy of the hole and the surface roughness of the hole.When machining threads, the drilling diameter is approximately the nominal diameter of the thread minus the pitch of the thread.
Q:Difference between milling cutter and reamer
Besides they say, the most intuitive is that the blade part of machine reamer is very short, while the neck is very long, so it looks like a long dumbbell.The end mills have longer cutter teeth, accounting for 1/2~2/3 of the overall length of the tool, and the neck is short. The cutter tooth is spiral and has fewer teeth. It looks sharp.People who don't know much about knives do so.
Q:What is the machining accuracy of the reamer?
Generally can reach H8, Ra3.2. You can also reach H7, Ra1.6, and a little bit of effort".
Q:The drill holes to make reamer reaming little what method is solved, (drill reaming to hit Phi 8.5, Phi 9)
The bottom is too small. Hinge 0.5 at once, aren't you afraid to damage the reamer? The general rough hinge margin is 0.15~0.35mm, and the precision joint margin is 0.1~0.2mm.
We are a young team full of creation & knowledge. We are always advocating the business faith of "honest, practical, innovative, senior". We adhere to the enterprise development goals of high quality, best service, timely innovation, and win-win cooperation all the time. we believe in the purchasing policy of "try our best to bring your cost down". If you plan to purchase goods to reduce your cost, please let us have a chance to quote at your needs. We are capable of providing you with a profitable proposal with assurance.Hope we can build long-term and good business relationship.

1. Manufacturer Overview

Location Guangdong,China
Year Established 2012
Annual Output Value
Main Markets North America
South America
Eastern Europe
Southeast Asia
Mid East
Eastern Asia
Western Europe
South Asia
Company Certifications ISO 9001:2008

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3. Manufacturer Capability

a)Trade Capacity  
Nearest Port shenzhen
Export Percentage 91% - 100%
No.of Employees in Trade Department 6-10 People
Language Spoken: English, Chinese
b)Factory Information  
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Contract Manufacturing
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