The Center Drill Bits for Prepared Precise Hole Machining

The Center Drill Bits are Used for the Machining of Center Holes on the End Faces of Shafts and Other parts

1. It is used for the precise positioning of prefabricated holes
2. Guides the twist drill bits to perform hole processing to reduce errors and accurately locate the holes
3. It is the positioning base surface for install the shaft type work piece on the center
4. The 60 ° conical hole in the center hole matches the 60 ° conical surface on the Ding tip

The Central Drill Bits Have Three Types

1. Type A: Center drill without guard cone
2. Type B: Center drill with guard cone
3. Compound center drill: use alone and also can use in different mechanical equipment

When machining center holes with a diameter of d = 2 ~ 10 mm

Usually use type A

When machining center holes with a diameter more than 10 mm

You can use type B

Usually use this drill bits for the processing of the center hole

Select according to the center hole is different

The Use of Center Drill is As Follows:

1. Before using the tool, it is necessary to wash the anti-rust grease to prevent chips from sticking to the cutting edge and affecting the cutting performance
2. Select the drill bits type according to the hole type and straight hole size of the machined part
3. The hardness of the work piece is better between 170-200HB
4. The surface of the work piece should be straight without trachoma or hard spots, so as not to damage the tool
5. Before drilling should achieve the required position accuracy
6. Cutting amount. Cutting fluid: Choose different cutting fluids according to the processing object, and the cooling should be sufficient

Do you want to know the taper shank drill bit? We have different kinds of drill bit and you can choose the drill bits which you need to drill on the material