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Dormer Pramet A978 8.00 mm HSS-E HIGH PERF MULT-APP STRAIGHT SHANK EXTRA LONG SERIES (3) DRILL DIN 1869 / 3
| Type | Extra Long Series |
| Drill Diameter | 8.00 |
| Flute Length | 265 |
| Overall Length | 390 |
| Shank Diameter | 8 |
| Substrate | HSS-E |
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Engineered for demanding metalworking tasks, the Dormer Pramet A978 8.00 mm HSS-E High-Performance Multi-Application Straight Shank Extra-Long Drill (DIN 1869 / 3) is built to deliver dependable precision and extended reach across a broad range of materials. The extra-long length expands your capability, letting you reach deep into assemblies, molds, or recessed workpieces without compromising rigidity.
- 130-degree point for self-centering — starts holes accurately and reduces the pushing force required, helping prevent wandering in tough materials.
- Bright finish — minimizes material from sticking to the cutting edge, promoting cleaner cuts and longer tool life.
- Parabolic flute design — optimized for deep-hole drilling, enabling efficient chip evacuation and stable penetration in a single pass.
- Premium HSS-E material — cobalt-enhanced high-speed steel that sustains hardness under heat, suitable for drilling steel, aluminium, and stainless steel with reliable performance.
- Extra-long length series — ideal for very deep holes and applications where extended reach is essential, from fabrication and aerospace to automotive repairs.
- Multi-application capability — designed to handle a broad spectrum of metals and non-ferrous materials, reducing tool changes and increasing workflow efficiency.
In real-world use, this drill shines on deep-hole projects, whether you’re threading through stainless steel dashboards, aluminum frames, or thick steel plates with limited access. The combination of a precise 130-degree point and efficient parabolic flutes delivers controlled entry, smooth cutting action, and consistent hole quality—even as workpieces demand prolonged drilling sessions.

| Type | Extra Long Series |
| Drill Diameter | 8.00 |
| Flute Length | 265 |
| Overall Length | 390 |
| Shank Diameter | 8 |
| Substrate | HSS-E |
| Coated | No |
What time are Protool open?
We are open Monday to Friday between 8:30am and 5pm.
Do you offer Free Next Day delivery?
Yes! We offer Free Next Day delivery via Royal Mail Tracked 24 on all orders over £50 ex VAT*. We also offer Free DPD Local Next Day delivery on all orders over £100 ex VAT*.
We also offer the following:
- Royal Mail Tracked 24 — £5.90 (FREE on orders over £50 ex VAT*). Order before 4:30pm for next day delivery. No signature required.
- DPD Local Next Day — £8.00 (FREE on orders over £100 ex VAT*). Standard next day delivery to UK mainland addresses.
- Royal Mail Special Delivery — £12.50. Guaranteed delivery before 1pm the next working day.
- DPD Saturday Delivery — £25.00. Must be ordered on Friday before 4pm. Pre-12pm delivery.
For delivery to Scottish Highlands & Islands, Northern Ireland, Republic of Ireland, or overseas locations, additional charges apply. Please see our delivery page for full details, or call us on 01732 887 334.
*T's & C's and exclusions apply. Please see our delivery page for more information on all our services.
Full Range: Dormer Pramet A978 HSS-E HIGH PERF MULT-APP STRAIGHT SHANK EXTRA LONG SERIES (3) DRILLS DIN 1869 / 3
View full collection →You are viewing DOR-A9788.0X390. Click any other SKU to view its full details.
| Product SKU | Drill Diameter | Flute Length | Overall Length | Shank Diameter | Price | Stock | Order |
|---|---|---|---|---|---|---|---|
| DOR-A9783.0 | 3.00 | 160 | 240 | 3 | £24.97 | 2 days | |
| DOR-A9783.5X265 | 3.50 | 180 | 265 | 3.5 | £29.21 | 2 days | |
| DOR-A9784.0X280 | 4.00 | 190 | 280 | 4 | £30.38 | 2 days | |
| DOR-A9784.5X295 | 4.50 | 200 | 295 | 4.5 | £36.07 | 2 days | |
| DOR-A9785.0X315 | 5.00 | 210 | 315 | 5 | £38.68 | 2 days | |
| DOR-A9786.0X330 | 6.00 | 225 | 330 | 6 | £48.52 | 2 days | |
| DOR-A9781/4 | 1/4 | 235 | 350 | 6.35 | £55.33 | 2 days | |
| DOR-A9786.5X350 | 6.50 | 235 | 350 | 6.5 | £62.24 | 2 days | |
| DOR-A9787.0X370 | 7.00 | 250 | 370 | 7 | £66.50 | 2 days | |
| DOR-A9788.0X390 Viewing | 8.00 | 265 | 390 | 8 | £81.40 | 2 days | |
| DOR-A9788.5X390 | 8.50 | 265 | 390 | 8.5 | £93.10 | 2 days | |
| DOR-A9789.0X410 | 9.00 | 280 | 410 | 9 | £100.02 | 2 days | |
| DOR-A9789.5X410 | 9.50 | 280 | 410 | 9.5 | £115.44 | 2 days | |
| DOR-A97810.0X430 | 10.00 | 295 | 430 | 10 | £118.64 | 2 days |
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