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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 | 0.070kg |
| Package Width | 0.030m |
| Package Height | 0.160m |
| Package Length | 0.075m |
| 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" |
Electrical and HVAC products sold by Sparky Direct are intended for installation by licensed and appropriately qualified professionals in accordance with applicable Australian Standards and regulatory requirements. Customers are responsible for ensuring that any product purchased, including any related or associated components, is compatible and suitable for their intended installation and application.
Sparky Direct does not provide installation advice and does not assess product suitability for individual circumstances unless expressly confirmed in writing. Customers must confirm correct product selection, compatibility, compliance, and suitability with a licensed or appropriately qualified professional prior to purchase.
Tools sold by Sparky Direct must be used safely and in accordance with the manufacturer’s instructions. Customers are responsible for ensuring they have the necessary knowledge and competence to operate any tool purchased. If you are unsure how to safely or correctly use a tool, do not use it and seek guidance from the manufacturer or a suitably qualified professional.
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