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Dormer Pramet A321 5.50 mm HSS ST/BR TRI-FLAT SHANK INTERMEDIATE LENGTH MECHANICS DRILL
| Type | Intermediate Drill |
| Drill Diameter | 5.50 |
| Flute Length | 52 |
| Overall Length | 84 |
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Description
The Dormer Pramet A321 5.50 mm HSS ST/BR Tri-Flat Shank Intermediate Length Mechanics Drill is a versatile high-speed steel drill designed for strength, durability, and precision. With a 5.50 mm diameter, it’s suitable for a wide range of general drilling tasks across steels and non-ferrous metals, making it a dependable choice for engineers, machinists, and hobbyists alike.
Key features include a tri-flat shank that locks securely in drill chucks and a polished finish that reduces friction and aids chip evacuation, helping you maintain accuracy and efficiency through longer runs.
- Tri-Flat Shank for Secure Chuck Grip: The tri-flat geometry delivers a more positive, slip-free grip in standard chucks, minimizing slippage and drift during drilling.
- Intermediate Length for Rigidity and Reach: Balanced length preserves rigidity while extending reach, enabling accurate holes without extra extensions or rework in a variety of setups.
- Polished Finish for Reduced Friction and Chip Evacuation: The polished surface lowers heat and friction, promotes smooth chip evacuation, and helps extend tool life during cuts into steels and non-ferrous metals.
This mechanics drill supports reliable, repeatable results across a wide range of applications. Its robust construction and secure chuck engagement reduce downtime and rework, helping you complete projects faster with confidence and consistency.
Part Numbers
- Protool Part Number
- DOR-A3215.5
- Brand
- Dormer Pramet
- Category
- Drill
Need cutting data? Call 01732 887334 or email sales@protool-ltd.co.uk.
Delivery
Free UK mainland delivery on orders over £50 ex VAT. In-stock items ordered before 4:30pm are dispatched the same working day. Full delivery information.
Returns
14-day returns on unused stock items in original packaging. Special-order and bespoke tooling is non-returnable. Read our returns policy.
Technical Support
Over 30 years of machining experience behind the counter. Call 01732 887334, Mon–Thurs 8:30–17:30, Fri 8:30–16:30.
Trade Accounts
Credit accounts, contract pricing and scheduled call-off orders available for trade customers. Apply for an account.
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 A321 HSS ST/BR TRI-FLAT SHANK INTERMEDIATE LENGTH MECHANICS DRILLS
View full collection →You are viewing DOR-A3215.5. Click any other SKU to view its full details.
| Product SKU | Drill Diameter | Flute Length | Overall Length | Shank Diameter | Price | Stock | Order |
|---|---|---|---|---|---|---|---|
| DOR-A3213.0 | 3.00 | 37 | 64 | 3 | £1.16 | 2 days | |
| DOR-A3213.3 | 3.30 | 40 | 67 | 3.3 | £1.19 | 2 days | |
| DOR-A3213.4 | 3.40 | 40 | 67 | 3.4 | £1.35 | 2 days | |
| DOR-A3213.5 | 3.50 | 40 | 67 | 3.5 | £1.40 | 2 days | |
| DOR-A3214.0 | 4.00 | 47 | 74 | 4 | £1.47 | 2 days | |
| DOR-A3214.1 | 4.10 | 47 | 74 | 4.1 | £1.64 | 2 days | |
| DOR-A3214.2 | 4.20 | 47 | 74 | 4.2 | £1.55 | 2 days | |
| DOR-A3214.3 | 4.30 | 47 | 74 | 4.3 | £1.84 | 2 days | |
| DOR-A3214.5 | 4.50 | 49 | 77 | 4.5 | £1.76 | 2 days | |
| DOR-A3214.9 | 4.90 | 50 | 80 | 4.9 | £1.87 | 2 days | |
| DOR-A3215.0 | 5.00 | 50 | 80 | 5 | £1.84 | 2 days | |
| DOR-A3215.1 | 5.10 | 50 | 80 | 5.1 | £2.10 | 2 days | |
| DOR-A3215.3 | 5.30 | 52 | 84 | 5.3 | £2.17 | 2 days | |
| DOR-A3215.5 Viewing | 5.50 | 52 | 84 | 5.5 | £2.45 | 2 days | |
| DOR-A3216.0 | 6.00 | 52 | 90 | 6 | £2.40 | 2 days | |
| DOR-A3216.3 | 6.30 | 52 | 90 | 6.3 | £2.81 | 2 days | |
| DOR-A3216.5 | 6.50 | 55 | 93 | 6.5 | £2.98 | 2 days | |
| DOR-A3216.8 | 6.80 | 59 | 97 | 6.8 | £3.22 | 2 days | |
| DOR-A3217.0 | 7.00 | 59 | 97 | 7 | £3.40 | 2 days | |
| DOR-A3217.3 | 7.30 | 62 | 100 | 7.3 | £3.62 | 2 days | |
| DOR-A3217.5 | 7.50 | 62 | 100 | 7.5 | £3.62 | 2 days | |
| DOR-A3218.0 | 8.00 | 67 | 105 | 8 | £4.00 | 2 days | |
| DOR-A3218.5 | 8.50 | 68 | 107 | 8.5 | £4.56 | 2 days | |
| DOR-A3219.0 | 9.00 | 70 | 108 | 9 | £5.29 | 2 days | |
| DOR-A3219.5 | 9.50 | 70 | 110 | 9.5 | £5.75 | 2 days | |
| DOR-A32110.0 | 10.00 | 74 | 113 | 10 | £6.29 | 2 days | |
| DOR-A32110.3 | 10.30 | 74 | 113 | 10.3 | £8.33 | 2 days | |
| DOR-A32110.5 | 10.50 | 75 | 115 | 10.5 | £8.10 | 2 days | |
| DOR-A32111.0 | 11.00 | 77 | 117 | 11 | £9.33 | 2 days | |
| DOR-A32111.5 | 11.50 | 79 | 120 | 11.5 | £9.94 | 2 days | |
| DOR-A32112.0 | 12.00 | 85 | 126 | 12 | £10.84 | 2 days | |
| DOR-A32112.5 | 12.50 | 88 | 130 | 12.5 | £11.80 | 2 days | |
| DOR-A32113.0 | 13.00 | 88 | 130 | 13 | £12.83 | 2 days |
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