HSS Centre Drill

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Detailed Product Description

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:PCD reamer machining hole wall roughness is not good
Consider the choice of materials and sizes
Q:What drill and reamer are used to process an empty diameter of 8mmH7?
You can refer to the relevant mechanical processing manual, should have an introduction, I think it should be 7.8 of the drill, 8 of the reamer
Q:How to heat the reamer with 40Cr material and how much hardness should be reached?
My suggestion is high frequency quenching or mesh belt furnace quenchingI don't know the size of your work here. If it's over 50, then you will not be able to do it later
Q:The machining center CNC uses reamer to lower the reamer oil. Should the spindle be turned or reversed?
The reamer reduces the reamer oil.... That's a good idea
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:In the lathe, with a floating reamer machining material for cast iron, diameter of 55mm hole, leaving margin 0.1mm, lathe speed is appropriate!!
Not too fast. Sooner, there will be errors
Q:In reaming, do you choose the four edge of the reamer or the three edge? Why?
When machining holes, the machining allowance is large, and the final accuracy is not requiredSelect three edge milling reamerThree blade positioning accuracyGood chip handling capacity
Q:Reaming problem of integral carbide reamer for NC Machining Center
Speed can be fed too fast, suggest speed 120, feed 6 to 10, if you can margin, as far as possible less unilateral 0.1 on the line. I have also been out of this problem, that is how to solve it, as well as the quality of the tool is also critical, ah, you tried to adopt Oh.
Q:The number of drills and reamers for diameter from 1 to 20.. The more detailed, the better
At 12 of the diameter of the drill, the 600. reamer is 2. The others you push, the reamer must be 500 slow, the hole surface quality is not good
Q:To machining M8, blank hole reamer processing thread with what specifications of the machine (bottom)?
A drill with a diameter of 6.7 and a M8 tap (also called a tap). Not reamer. There is in the Baidu library, you enter the "drill thread bottom hole" see,Your 7H in the thread accuracy level is a rough level, there is no need to use reamer, and you find 6.7 of the reamer to find it? The internal thread accuracy is divided into three grades, precision, 4H, medium, 6H, rough, 7H. GB recommended using 6H.
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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

2. Manufacturer Certificates

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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  
Factory Size:
No. of Production Lines
Contract Manufacturing
Product Price Range