Dormer A777 HSCo Cobalt Heavy-Duty Jobber Drills Metric - 3.50mm
SKU DOR350COB Barcode 7320760375020
50 available from our warehouse. Despatch times vary.
- Expert UK product support
- Authorised distributor
- 30 day returns
Delivery & returns
Despatch times vary by item. Check the product-specific lead time shown on this page. Supplier-shipped and larger items may take longer.
Delivery options and transit times are shown at checkout. Transit time starts after despatch and excludes weekends and bank holidays unless the selected service states otherwise. Tracking is provided when available.
30 day returns on unused items in original packaging.
Description
Description
Dormer A777 HSCo Cobalt Heavy-Duty Jobber Drill Bit 3.50 mm
The Dormer A777 HSCo Cobalt Heavy-Duty Jobber Drill Bit, available at Trade Counter Direct, is engineered for demanding drilling applications where increased heat resistance and durability are essential. This 3.50 mm metric cobalt drill bit is specifically designed for use on high tensile and tough materials, making it ideal for industries such as aerospace where precision and reliability are paramount.
Manufactured from high-speed cobalt steel (HSCo) and featuring a bronze surface treatment, the Dormer A777 delivers superior performance and longevity. Its advanced flute geometry and split point design ensure efficient drilling, reduced wandering, and optimal chip removal, even in the most challenging materials.
Features
- Manufactured from HSCo cobalt steel for enhanced heat and wear resistance
- Heavy-duty design suitable for high tensile and tough materials
- 135° split point geometry minimises wandering and improves accuracy
- Standard helix with right-hand spiral and thick web for strength and stability
- Bronze surface treatment for reduced friction and improved durability
- Compliant with DIN 338 RN, BS328, and ISO 235 standards
- Optimised for aerospace and other demanding industrial applications
Specifications
| SKU | DOR350COB |
|---|---|
| Range/Series | Dormer A777 |
| Tip Diameter | 3.50 mm |
| Working Length | 39 mm |
| Overall Length | 70 mm |
| Material | HSCo Cobalt steel |
| Surface Treatment | Bronze |
| Flute Geometry | Standard Helix, Right hand spiral, Thick Web |
| Point Angle |
0.30 mm – 0.95 mm: 118° Conical point 1.00 mm – 1.40 mm: 135° 4 facet point 1.50 mm and above: 135° split point (NAS 907 Aerospace Specification type P3 Point) |
| Standards | DIN 338 RN / BS328 / ISO 235 |
| Manufacturer Part No | A7773.5 |
Delivery & returns
Despatch times vary by item. Check the product-specific lead time shown on this page. Supplier-shipped and larger items may take longer.
Delivery options and transit times are shown at checkout. Transit time starts after despatch and excludes weekends and bank holidays unless the selected service states otherwise. Tracking is provided when available.
30 day returns on unused items in original packaging. Contact us for a returns number before sending anything back.
