Twist Drill is the most widely used hole machining Tool. The usual diameter range is 0.25 to 80 mm. It is mainly composed of bit working part and shank. The working part has two spiral grooves, shaped like a twist, hence the name.
In order to reduce the friction between the guide part and the hole wall when drilling, twist drill from the drill tip to the handle direction gradually reduce the diameter of the inverted cone. The screw Angle of twist drill mainly affects the size of cutting edge Angle, edge edge strength and chip removal performance, which is usually 25° ~ 32 °. Spiral grooves can be processed by milling, grinding, hot rolling or hot extrusion, and the front end of the Drill Bit forms a cutting part after grinding. The cutting Angle of the standard twist drill is 118, the bevel Angle of the cross edge is 40° ~ 60 °, and the back Angle is 8° ~ 20°. Due to structural reasons, the rake Angle is large at the outer edge and gradually decreases to the middle, and the transverse edge is negative rake Angle (up to about -55°), which acts as extrusion when drilling.
Twist Drill Bits for Stainless Steel and Hard Metal
Model NO. GM025
Surface Tin Coated Bright Finish
Transport Package Carton Box
Specification all size available
| Product Description |
| Product Name | 5mm / 0.19" Cobalt Drill Bit, M35 Cobalt Twist Drill Bits for Stainless Steel and Hard Metal |
| Color | Amber Finish |
| Available Size | All Size Available |
| Qty/Carton | 1000 pcs; |
| Gross Weight/ Net Weight | 18 kg/17 kg |
| Carton Measurement | 40*32*25.5cm |
| Package | OPP Bag, Plastic Box, Paper Box, or to be Customized |
| Delivery Time | 35~45 days, According to Order Quantity |
| Payment Terms | T/T, D/P, L/C, Paypal, Western Union, etc. |
| Unit Price | Contact Us to Get the Latest Price (Larger Quantity, More Discount) |
| Q&A: |
| |
| 1. Are you Manufacturer? Do you have the Factory? |
| We are a professional manufacturer ,we have more than ten years' experience in this field. |
| 2.Is it possible for you to offer free shipping ? |
| We will offer you discount when you buy large quantity products, Normally we don't offer free shipping service. |
| 3.Can you send products to our Forwarder in China? |
| Yes, if you have forwarder in China, we will be glad to send products to him/her. |
| 4. Can you make OEM? |
| Yes, we can do OEM base on the quantity, we can customize as you required. |
| 5.How about the delivery time? |
| The delivery time is usually 20-40 days; We can tell you the exact inventory state if you need. |
| 6.Do you have any Foreign Partners? |
Yes, our products have been exported overseas for more than eight years. There are many partners in various regions,
eg. Europe, North America, Middle East, etc. |
Product Categories : Drill Bit > Twist Drill Bit
