Triangular handle straight groove step drill set 3 pieces 4-12/4-20/4-32mm

Description:
This drill has a unique stepped structure, which enables it to flexibly open holes of various sizes, thus achieving the convenience of one drill to meet multiple needs. Compared with traditional twist drills, it can be constructed without the use of center impact, which greatly reduces the risk of breakage, and can be applied to drilling needs of various specifications, simplifying the operation steps.

This drill can not only open holes, but also remove burrs, chamfer, open holes and expand holes, which are not easily achieved by traditional twist drills. Compared with ordinary twist drills, it shakes less during operation, and can open precise and beautiful holes even without center impact.
When using, it can be used with a hand drill or a bench drill, and it is recommended to use water for cooling, which can not only effectively extend the service life of the drill bit, but also reduce the high temperature generated during drilling and reduce tempering. It is particularly important to note that when drilling stainless steel, be sure to choose M35 material and avoid using 4241 material to avoid scrapping the drill bit. For drilling holes in steel plates below 5 mm, water cooling measures should be strengthened, because such working conditions will more easily cause the drill bit to heat up during use and quickly become scrapped.
Overall, this drill bit provides an efficient, safe and economical solution for field work through its advanced design and multifunctional nature, and is particularly suitable for professional environments that require frequent drilling operations.

Feature:
1. Unique step structure, one drill bit can open holes of various specifications and sizes, and one step can reach a box of drill bits.

1. There is no need to use the center punch, which is not easy to break compared with the ordinary fried dough twist drill. For on-site construction, one step drill is applicable to a variety of specifications.

2. Deburring, chamfering, hole opening and expanding, and functions that cannot be completed by fried dough twist drills are possible.

3. Compared with ordinary fried dough twist drill. Small shaking, can open a beautiful hole without using the center punch.

4. Tools used: hand drill, table drill.Cooling with water while working can effectively extend the service life of the drill bit. It is recommended to drill at a speed of 250-400 revolutions per minute.

6.Special reminder: Be sure to choose M35 material when drilling stainless steel. If you choose 4241 material for one hole, the drill bit will be discarded. The thickness of the workpiece is below 5 millimetersWhen drilling steel plates, be sure to add water for cooling. The drill bit is prone to high-temperature smoke and tempering during use. Customers who insist on this operation will quickly scrap the drill bit.

Specifications:
Product name: Triangular handle step drill.
Surface treatment: titanium plating.
Specifications: 4-32mm, 10mm handle.
4-20mm, 8mm handle.
4-12mm, 6mm handle.
Product weight: 4-12mm weighs 20g, 4-20mm weighs 50g, 4-32mm weighs 155g, 3pc weighs 225g.

What’s in the box
1xDrill bit 3pcs