Specialize in industrial tools and machine tool accessories since 1993


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best quality step drill step factory price engineering

best quality step drill step factory price engineering

best quality step drill step factory price engineering
  • best quality step drill step factory price engineering

best quality step drill step factory price engineering

Product Information
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Product Details
Next, PRECO will present you with the specific details of machine tool supply.PRECO is certified by various qualifications. We have advanced production technology and great production capability. machine tool supply has many advantages such as reasonable structure, excellent performance, good quality, and affordable price.
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Company Advantages
1. Properties like high speed steel step drill bits can be customized to continuous function value optimization.
2. This product is not only powerful, but also durable and has a longer service life than other competing products.
3. It has been proved that Qingdao preco imp. & exp. co., ltd. is getting more and more popularity.
4. After many years of tempering to form a market image of excellence, Qingdao preco imp. & exp. co., ltd. uses its own strength to win the trust of many customers both at home and abroad.

Product Information

Step Drills
Individual Size

SizeStepShankTotal LengthItem No. 


  In WoodenIn MetalIn Plastic 
34-12mm(9 steps)354-5030354-5039354-5034
 4-20mm(9 steps)   
 4-30mm(14 steps)   
34-12mm(5 steps)354-5035354-5032354-5044
 6-20mm(8 steps)   
 6-30mm(13 steps)   

Product Message

Company Features
1. With the development of society, the reputation of PRECO in the step drill market has been improved.
2. Our step bit is easily operated and need no additional tools.
3. We stick to green manufacturing. We examine various aspects of our operations, with the aim of making our production more environmentally friendly. We make efforts to contribute to communities and society. We develop locally when possible, work closely with local businesses and employ local people to promote socio-economic development. We have created sustainability strategies to seek to improve profits as well as reduce environmental impact. We are sparing with the water and energy in the production process, and limiting our carbon footprint in the transport of our waste.

 Solid carbide step twist drills


SU series solid carbide twist drill General machining:

1.Wide applications, for high efficient machining of various materials P (steel), M (stainless steel), K(cast iron), 

and S (heat-resistant alloy).

2.Optimized flute structure and corrugated cutting edge with outstanding sharpness and strength ensure 

unhampered chip flow.

3.140° point angle reduces the feed force of drilling in the initial stage, achieving perfect self-centering capability 

and improving quality of hole machined.

4.Nano-structured TiAlN coating improves thermal hardness and avoids built-up edge


Grade introduction for solid carbide drill tools:

Coated grade


Ultra-fine carbide substrate with high strength,toughness and wear resistance, in combination with nano-structured 

nc-TiAlN coating aiming at optimizing drilling operations, makes sure the tools have very high toughness and hardness. 

Unique coating technology gives the tools smooth surface and excellent wear resistance, and outstanding thermal 

stability and chemical stability provide effective protection for the cutting edge.

Uncoated grade


Ultra-fine grain carbide substrate with high hardness, outstanding wear resistance, and long tool life.


Ultra-fine carbide substrate with high strength, toughness and wear resistance gives the cutting edge perfect strength.




Product Description


For the manufacturing of PRECO high speed steel step drill bits, the specially prepared wood materials are selected. Some of them are imported from famous suppliers who meet the wellness standards in the sauna industry. All products are in strict accordance with the standard
PRECO high speed steel step drill bits undergoes a complicated production process, from design and engineering to prototyping, metal fabrication, finishing, final assembly, quality control, logistics, and delivery. Product is more cost-effective than other products
The production equipment of PRECO high speed steel step drill bits is constantly upgraded. The equipment includes extruder, mixing mill, surfacing lathes, milling machinery, and molding press machinery. Featured with long service life and small capacity loss
PRECO high speed steel step drill bits has passed the necessary checks. These checks include its dimension check, surface treatment check, dents, cracks, and burrs checks. It emits light evenly with small shadows and low heat
The manufacturing of PRECO step bit meets the requirements of the green principle 'minimize the impacts on the environment'. It adopts recycled raw materials which meet international standards of building materials. It has mature product structure and production process
The product is able to withstand weather elements. Its roof and wall covering are double PVC-coated polyester textile fabric which is UV resistant, waterproof and flame retardant. The product is also the closest to commercialization
The product features excellent shock resistance. Its lamp shade is made of aluminum alloy, which allows it to withstand any collision. It is an economical and efficient light
The product can retain its shape without overheating, resonating or warping. The wood used has been thermo-treated, which is moisture and dimensionally stable. All products are in strict accordance with the standard
The product features a smooth surface. During the production stage, all imperfections are eliminated, such as microholes, cracks, burrs, and watermarks. The direction our products will develop towards is to meet your requirements
The product has remarkable quality, which has been highly evaluated and proved by the third-party testing organizations in terms of material and workmanship referring to the gifts and crafts. It is more energy saving
The product features great brittleness. When it is subjected to load, it can break suddenly without causing any deformation. The color temperature is constant and uniform
The product helps create a relaxing bathing or washing atmosphere, representing different lifestyles. It is especially suitable for those who think highly of life taste. Featured with long service life and small capacity loss
The product will run for a long time, saving homeowners or business owners the hassle and expense of replacing it. It is more energy saving
Containing zero methanal or other chemical materials which are harmful to people, this product has no health influence phone owners. Products are sold to more than 70 countries in the past years
This product can decrease environmental impacts and help to reduce reliance on mechanical systems for the building’s energy. It is more energy saving
For most people today, the product has been optimized and is much well organized, compact and easy to maintain. Our lights can meet the requirements of ROHS
The product is used in a variety of industries. It greatly relieves labor intensity, relieves people from dangerous work, and improves productivity. Our lights can meet the requirements of ROHS
Product Message
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