DORMER
Dormer A777 HSCo Heavy-Duty Jobber Drill 4.50mm OL:80mm WL:47mm A7774.5
Model A7774.5
Best price
Where to buy
| Retailer | Price | Availability | Visit |
|---|---|---|---|
| Cheapestchecked 23 hours ago | £12.48 | In stock | Visit Blueperry agriculture (UK) (opens in a new tab) |
 retailer's price from 16 Jul 2026 | £13.23 | In stock | Visit Blueperry Tool & Builders Merchants (UK) (opens in a new tab) |
 checked within the hour | £63.95£151.20 | In stock | Visit Tooled Up (opens in a new tab) |
Prices exclude delivery. We may earn a commission if you buy through these links, which never affects the ranking above — it is always cheapest first.
Price history
Full price historyToday's price is above the 53-day average and 8% above the lowest we have recorded, so it may be worth waiting.
About this product
The Dormer A777 is a heavy-duty jobber drill bit made from HSS-E cobalt steel (8% cobalt), giving high hardness and wear resistance for demanding, high-heat drilling applications on tougher, higher tensile materials. It features a 135° split point design to NAS 907 aerospace specification, reducing walking and improving drilling accuracy, along with a standard right-hand spiral flute and bronze surface finish.
This size has a tip diameter of 4.50mm, a working length of 47mm and an overall length of around 80mm. It conforms to DIN 338 / BS328 / ISO 235 standards, suiting professional and industrial use, including aerospace applications.
Features & Benefits
- High speed cobalt steel
- Standard spiral flute design
- DIN338
- Bronze finish
- NAS907J
- Right hand rotation/cutting
- 135° point angle
Specifications
| Diameter | 4.5mm |
|---|---|
| Overall Length | 80mm |
| Quantity | 10 |
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