Product Details
Place of Origin: JIANG SU CHINA
Brand Name: STARRY
Certification: ISO9000
Model Number: 4-12mm, 4-20mm, 4-32mm
Payment & Shipping Terms
Minimum Order Quantity: 100 Set/Sets
Price: Negotiable
Packaging Details: 3Pcs packed in one aluminum case, 20sets/carton.
Delivery Time: 25days
Supply Ability: 50000 Set/Sets per Month Step Drill Set
Material: |
Hss-4241;4341;m2;m35 |
Use: |
Metal Drilling |
Flute: |
Spiral Flute |
Flute Number: |
Three Flutes |
Shank: |
Three Flat Shank |
Process: |
Fully Ground |
Point Angle: |
135 Degree Split Point |
Surface Finish: |
Black Oxide |
Application: |
Metal Sheet Tube Drilling |
Material: |
Hss-4241;4341;m2;m35 |
Use: |
Metal Drilling |
Flute: |
Spiral Flute |
Flute Number: |
Three Flutes |
Shank: |
Three Flat Shank |
Process: |
Fully Ground |
Point Angle: |
135 Degree Split Point |
Surface Finish: |
Black Oxide |
Application: |
Metal Sheet Tube Drilling |
1. CBN ground flute
CBN ground spiral flutes enable very sharp and burr-free cutting edges compared to the ordinary milled flutes. Especially the chip flow isoptimized, so even long, non-breaking chips will be removed easily. The optimized chip flow protects the cutting edges and reduces built-upedges and cold weld marks. Due to these special features, cutting performance and tool life are extended significantly.
2. Radially adjusted relief produced by CBN grinding
Each step has a radially adjusted relief produced by CBN grinding that relates directly to the diameter of the step.This means the cutting edge is always the highest point of the diameter.
3. Flute
Each step is axially CBN relief ground. This means the cutting edge is always the highest point of the axial cutting axis.
4. CBN ground relief angle
The cutting edge of each step has relief angle. This means the cutting edge is also the highest point in advance direction.
5. CBN ground bit with split point DIN 1412 C
The CBN ground bit ensures centering and spot-drilling even in thin-walled material.
| Procuct Name |
3Pcs 3 Flats Shank Spiral Flute HSS Step Drill Bit Set |
| Sizes | 4-12mm, 4-20mm, 4-32mm (step drill bit) |
| Material | HSS (Cobalt M35 is Available) |
| Flute Type | Spiral Flute |
| Flute Number | Two Flutes (Single Flute, Three Flutes are Available) |
| Shank | Three Flats Shank (Quick Change Hex Shank, Round Shank, Double R Shank are Available) |
| Surface Finish | Black Oxide |
| Package | 3Pcs in Aluminum Case |
| Features |
1. Step drill bits are perfect for drilling and enlarging multiple-holes in thin sections of sheet metals, pipes, plexiglass, plastics, wood up to a thickness of 5mm. 2. 135° Spilt Point Tip: increases cutting speed with self-centering and the drills do not run off center. 3. A variety of hole diameters can be drilled using only one tool. 4. The dimension of drilled hole is exact. 5. Two Flute Design: provides longer life and better chip removal. 6. Titanium nitride coating provides up to 6 times the life over high speed steel. 7. Only for rotary use. |
1. Experience : We are a supplier of many brands in Germany. So we have the confidence to provide you with the best service.
2. Quality Control : Quality Control System from STARRY Germany ensure our STARRY Factory's products and service QUALITY which have strict processing quality Control for every step.
3. Service : We offer OEM&ODM service.and we accept trial order. If you find any problem. we'll find the suitable solution.
4. Product : We have confidence in the quality of our products.and the product prices are also competitive.
Q1: Do you have your own brand?
A1: Yes, the brand name is STARRY Tools, we can provide OEM services to our customers as well.
Q2: What's your target market?
A2: We mainly focus on Europe and South America right now.
Q3: What is the biggest advantage compared to the rivals?
A3: We are one of the strongest HSS Cutting tools supplier in China.
Q4: What is your MOQ?
A4: 500 pcs
Q5: What about the payment and delivery time?
A5: Delivery time: All items are ready in stock and can be sent within one week.
Payment: T/T.
100% protection for product quality, on-time shipment and payment
Q6: Can I get some samples?
A6: Yes, we are honored to offer you samples for quality check at your freight cost.
Q7: How does your factory do regarding quality control?
A7: Quality is priority. We always attach great importance to quality control from the very beginning to the end of the production. Every product will be carefully tested before it's packed for shipment.
