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The Alpha C9STSIM4-20TM is a 4–20mm spiral flute step drill with 9 precision steps, engineered for fast, clean drilling through sheet metal, plastics, and non-ferrous materials. It features a 1/4" quick-change shank, making it compatible with both cordless drills and impact drivers for efficient tool changes on the job.
Built for performance, the bit includes a self-starting split point that removes the need for pilot holes, and a tempered black finish for better chip flow, heat resistance, and corrosion protection. The 2-flute spiral design supports smoother cutting and cleaner results, while laser-etched step markings ensure high visibility during use. Rated for materials up to 3mm thick (or 1.5mm in stainless steel), this drill bit is a tough, trade-ready solution for accuracy and speed.
Alpha C9STSIM4-20TM Features
C9STSIM4-20TM FAQ
Q: What is this drill best suited for?
A: It’s ideal for metal, plastic, and stainless steel up to 1.5mm thick.
Q: Can I use it with an impact driver?
A: Yes, it’s compatible with cordless drills and impact drivers.
Q: Are the step sizes easy to read?
A: Yes, they’re laser-etched for clear, long-lasting visibility.
(C9STSIM4-20TM)
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Warranty starts from Invoice Date
Domestic Use: 1 Year
Commercial Use: 1 Year
Warranty Method: Return to Sparky Direct
| Specification | Details |
|---|---|
| SKU | C9STSIM4-20TM |
| Type | Spiral Step Drill |
| Drilling Range | 4 – 20 mm |
| Steps | 9 steps: 4, 6, 8, 10, 12, 14, 16, 18 & 20 mm |
| Shank Size | 1/4″ Quick Change |
| Material Suitability | Sheet metal, non-ferrous metals, plastic (up to 3 mm), stainless steel (up to 1.5 mm) |
| Tool Compatibility | Cordless drills & impact drivers |
| Cutting Speed | 400 – 1,500 RPM |
| Finish | Tempered black finish (corrosion resistant, maximizes lubricant hold) |
| Special Features | Laser etched hole sizes, non-slip shank, 2 flute design, self-starting split point |
These specifications and characteristics outline physical, mechanical, electrical details.
| Brand | Alpha |
| SKU | C9STSIM4-20TM |
| Model # | C9STSIM4-20TM |
| Barcode # | 9313601016143 |
| Package Weight | 0.060kg |
| Package Width | 0.080m |
| Package Height | 0.170m |
| Package Length | 0.035m |
| TYPE | VALUE |
|---|---|
| Type | Step Drill |
| Brand | Alpha |
| Steps | 9 |
| Drill Sizes | 4, 6, 8, 10, 12, 14, 16, 18 & 20 mm |
| Shank Size | 1/4" |
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