Dormer Pramet A125 3/8 Inch x 310 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

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Dormer Pramet A125 3/8 Inch x 310 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

Name: Dormer Pramet A125 3/8 Inch x 310 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328
Brand: Dormer Pramet
SKU: DOR-A1253/8X315
Price: 45.1 GBP
Availability: InStock

SKU:DOR-A1253/8X315

Meet the Dormer Pramet A125 3/8 Inch x 310 mm HSS ST Straight Shank Extra Long Series Drill BS 328 — a purpose-built twist drill crafted for deep-hole precision in metalworking. With its extended ... Read more ↓

Material Compatibility

Specifications at a glance

Type	Extra Long Series
Drill Diameter	3/8
Flute Length	250
Overall Length	310

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£45.10

Prices shown ex. VAT

2 days estimated lead time — subject to availability

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01732 887334

Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

Description

118° conventional point — delivers a strong, self-centering start that resists wandering and remains easy to re-sharpen in the field.
Steam oxide finish — helps reduce built-up edge and prevents workpiece material from sticking to the cutting edge, promoting smoother holes and longer edge life.
Extra-long length (310 mm) — ideal for drilling very deep holes or accessing tight areas, reducing the need to swap to multiple tools for extended reach.
Premium HSS material — high-speed steel built for durability and heat resistance, capable of drilling through steel, aluminum, and stainless steel with reliable performance.
Straight shank — compatible with a wide range of drill chucks and machine tools, delivering stable, true alignment and minimal runout.
BS 328 compliant — designed to meet professional standards for dependable, repeatable results in demanding applications.

Versatile in practice, this drill shines in a variety of scenarios:

Fabrication and construction tasks that require deep drilling into steel frameworks, brackets, and gussets.
Automotive and machinery assembly where long reach and consistent hole quality are crucial.
Machining aluminum or stainless steel components where clean chip formation and edge life matter.

Practical tips for maximum performance:

Choose the right speed: moderate speeds for steel, slightly higher for aluminum, and use suitable cutting fluid to extend tool life.
Use measured pecking to clear chips when drilling deep holes, reducing heat buildup and improving hole finish.
Inspect the tip regularly and re-sharpen as needed to maintain the precise 118° starting point for accurate starts.

The Dormer Pramet A125 3/8 in x 310 mm HSS Straight Shank Extra Long Series Drill BS 328 is a dependable choice for professionals who need depth, rigidity, and consistent performance in demanding drilling tasks. The brand’s logo image below underscores its heritage of quality in metalworking tools.

Part Numbers

Protool Part Number: DOR-A1253/8X315
Brand: Dormer Pramet
Category: Drill

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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.

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Full Range: Dormer Pramet A125 HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILLS BS 328

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Product SKU	Drill Diameter	Flute Length	Overall Length	Shank Diameter	Price	Stock

DOR-A1251.4X160	1.40	100	160	1.4	£19.93	2 days
DOR-A1251.5X125	1.50	80	125	1.5	£11.35	2 days
DOR-A1251.5X160	1.50	100	160	1.5	£13.45	2 days
DOR-A1251/16X125	1/16	80	125	1.59	£13.82	2 days
DOR-A1251/16X160	1/16	100	160	1.59	£16.54	2 days
DOR-A1251.8X160	1.80	100	160	1.8	£17.40	2 days
DOR-A1255/64X160	5/64	100	160	1.98	£17.08	2 days
DOR-A1255/64X125	5/64	80	125	1.98	£16.37	2 days
DOR-A1252.0X125	2.00	80	125	2	£8.79	2 days
DOR-A1252.0X160	2.00	100	160	2	£10.31	2 days
DOR-A1252.2X160	2.20	100	160	2.2	£10.70	2 days
DOR-A1253/32X160	3/32	100	160	2.38	£10.35	2 days
DOR-A1253/32X125	3/32	80	125	2.38	£9.47	2 days
DOR-A1252.5X125	2.50	80	125	2.5	£8.30	2 days
DOR-A1252.5X160	2.50	100	160	2.5	£10.21	2 days
DOR-A1257/64X125	7/64	80	125	2.78	£10.02	2 days
DOR-A1257/64X160	7/64	100	160	2.78	£15.35	2 days
DOR-A1253.0X160	3.00	100	160	3	£9.70	2 days
DOR-A1253.0X200	3.00	150	200	3	£12.95	2 days
DOR-A1253.0X250	3.00	200	250	3	£16.45	2 days
DOR-A1251/8X160	1/8	100	160	3.18	£11.93	2 days
DOR-A1251/8X200	1/8	150	200	3.18	£12.11	2 days
DOR-A1251/8X250	1/8	200	250	3.18	£23.58	2 days
DOR-A1251/8X315	1/8	250	310	3.18	£27.13	2 days
DOR-A1253.3X160	3.30	100	160	3.3	£13.98	2 days
DOR-A1253.5X160	3.50	100	160	3.5	£9.83	2 days
DOR-A1253.5X200	3.50	150	200	3.5	£12.16	2 days
DOR-A1253.5X250	3.50	200	250	3.5	£17.10	2 days
DOR-A1259/64X160	9/64	100	160	3.57	£17.27	2 days
DOR-A1259/64X200	9/64	150	200	3.57	£17.36	2 days
DOR-A1259/64X315	9/64	250	310	3.57	£25.17	2 days
DOR-A1255/32X160	5/32	100	160	3.97	£12.08	2 days
DOR-A1255/32X200	5/32	150	200	3.97	£14.30	2 days
DOR-A1255/32X250	5/32	200	250	3.97	£27.59	2 days
DOR-A1255/32X315	5/32	250	310	3.97	£35.02	2 days
DOR-A1254.0X160	4.00	100	160	4	£9.85	2 days
DOR-A1254.0X200	4.00	150	200	4	£12.75	2 days
DOR-A1254.0X250	4.00	200	250	4	£17.05	2 days
DOR-A1254.0X315	4.00	250	310	4	£21.16	2 days
DOR-A12511/64X160	11/64	100	160	4.37	£15.90	2 days
DOR-A12511/64X200	11/64	150	200	4.37	£19.15	2 days
DOR-A12511/64X315	11/64	250	310	4.37	£27.59	2 days
DOR-A1254.5X160	4.50	100	160	4.5	£11.48	2 days
DOR-A1254.5X200	4.50	150	200	4.5	£15.03	2 days
DOR-A1254.5X250	4.50	200	250	4.5	£23.03	2 days
DOR-A1254.5X315	4.50	250	310	4.5	£25.17	2 days
DOR-A1253/16X160	3/16	100	160	4.76	£11.63	2 days
DOR-A1253/16X200	3/16	150	200	4.76	£13.25	2 days
DOR-A1253/16X250	3/16	200	250	4.76	£16.86	2 days
DOR-A1253/16X315	3/16	250	310	4.76	£24.62	2 days
DOR-A1253/16X400	3/16	300	400	4.76	£46.51	2 days
DOR-A1255.0X160	5.00	100	160	5	£11.16	2 days
DOR-A1255.0X200	5.00	150	200	5	£14.67	2 days
DOR-A1255.0X250	5.00	200	250	5	£18.24	2 days
DOR-A1255.0X315	5.00	250	310	5	£25.26	2 days
DOR-A1255.0X400	5.00	300	400	5	£32.19	2 days
DOR-A12513/64X200	13/64	150	200	5.16	£22.80	2 days
DOR-A12513/64X250	13/64	200	250	5.16	£29.55	2 days
DOR-A12513/64X315	13/64	250	310	5.16	£38.81	2 days
DOR-A1255.5X200	5.50	150	200	5.5	£13.57	2 days
DOR-A1255.5X250	5.50	200	250	5.5	£21.96	2 days
DOR-A1255.5X315	5.50	250	310	5.5	£34.75	2 days
DOR-A1257/32X200	7/32	150	200	5.56	£17.68	2 days
DOR-A1257/32X250	7/32	200	250	5.56	£22.56	2 days
DOR-A12515/64X200	15/64	150	200	5.95	£27.36	2 days
DOR-A12515/64X315	15/64	250	310	5.95	£26.27	2 days
DOR-A1256.0X200	6.00	150	200	6	£15.78	2 days
DOR-A1256.0X250	6.00	200	250	6	£21.11	2 days
DOR-A1256.0X315	6.00	250	310	6	£26.27	2 days
DOR-A1256.0X400	6.00	300	400	6	£38.26	2 days
DOR-A1251/4X200	1/4	150	200	6.35	£17.28	2 days
DOR-A1251/4X250	1/4	200	250	6.35	£21.89	2 days
DOR-A1251/4X315	1/4	250	310	6.35	£27.13	2 days
DOR-A1251/4X400	1/4	300	400	6.35	£55.63	2 days
DOR-A1251/4X500	1/4	400	460	6.35	£77.06	2 days
DOR-A1256.5X200	6.50	150	200	6.5	£18.10	2 days
DOR-A1256.5X250	6.50	200	250	6.5	£22.44	2 days
DOR-A1256.5X315	6.50	250	310	6.5	£32.42	2 days
DOR-A12517/64X200	17/64	150	200	6.75	£22.34	2 days
DOR-A12517/64X250	17/64	200	250	6.75	£30.05	2 days
DOR-A12517/64X500	17/64	400	460	6.75	£77.06	2 days
DOR-A1257.0X200	7.00	150	200	7	£19.52	2 days
DOR-A1257.0X250	7.00	200	250	7	£24.94	2 days
DOR-A1257.0X315	7.00	250	310	7	£35.16	2 days
DOR-A1257.5X200	7.50	150	200	7.5	£23.39	2 days
DOR-A1257.5X250	7.50	200	250	7.5	£28.18	2 days
DOR-A1257.5X315	7.50	250	310	7.5	£36.57	2 days
DOR-A1255/16X200	5/16	150	200	7.94	£22.15	2 days
DOR-A1255/16X250	5/16	200	250	7.94	£27.86	2 days
DOR-A1255/16X315	5/16	250	310	7.94	£36.94	2 days
DOR-A1255/16X500	5/16	400	460	7.94	£91.20	2 days
DOR-A1258.0X250	8.00	200	250	8	£27.54	2 days
DOR-A1258.0X315	8.00	250	310	8	£37.12	2 days
DOR-A1258.0X400	8.00	300	400	8	£46.97	2 days
DOR-A12521/64X315	21/64	250	310	8.33	£68.40	2 days
DOR-A1258.5X250	8.50	200	250	8.5	£37.71	2 days
DOR-A1258.5X315	8.50	250	310	8.5	£50.62	2 days
DOR-A12511/32X250	11/32	200	250	8.73	£36.02	2 days
DOR-A12511/32X315	11/32	250	310	8.73	£61.56	2 days
DOR-A12511/32X400	11/32	300	400	8.73	£76.15	2 days
DOR-A12511/32X500	11/32	400	460	8.73	£91.20	2 days
DOR-A1259.0X250	9.00	200	250	9	£32.65	2 days
DOR-A1259.0X315	9.00	250	310	9	£41.59	2 days
DOR-A1259.0X400	9.00	300	400	9	£59.74	2 days
DOR-A1259.5X250	9.50	200	250	9.5	£39.12	2 days
DOR-A1259.5X315	9.50	250	310	9.5	£52.90	2 days
DOR-A1253/8X250	3/8	200	250	9.52	£35.57	2 days
DOR-A1253/8X315 Viewing	3/8	250	310	9.52	£45.10	2 days
DOR-A1253/8X400	3/8	300	400	9.52	£57.00	2 days
DOR-A1253/8X500	3/8	400	460	9.52	£78.43	2 days
DOR-A12510.0X250	10.00	200	250	10	£37.57	2 days
DOR-A12510.0X315	10.00	250	310	10	£46.51	2 days
DOR-A12510.0X400	10.00	300	400	10	£68.86	2 days
DOR-A12513/32X250	13/32	200	250	10.32	£46.97	2 days
DOR-A12513/32X315	13/32	250	310	10.32	£57.91	2 days
DOR-A12510.5X250	10.50	200	250	10.5	£46.97	2 days
DOR-A12510.5X315	10.50	250	310	10.5	£60.65	2 days
DOR-A12510.5X400	10.50	300	400	10.5	£72.96	2 days
DOR-A12511.0X250	11.00	200	250	11	£42.36	2 days
DOR-A12511.0X315	11.00	250	310	11	£53.81	2 days
DOR-A12511.0X400	11.00	300	400	11	£67.03	2 days
DOR-A1257/16X250	7/16	200	250	11.11	£51.98	2 days
DOR-A1257/16X315	7/16	250	310	11.11	£65.66	2 days
DOR-A1257/16X400	7/16	300	400	11.11	£136.34	2 days
DOR-A12529/64X315	29/64	250	310	11.51	£60.65	2 days
DOR-A12512.0X250	12.00	200	250	12	£49.70	2 days
DOR-A12512.0X315	12.00	250	310	12	£57.91	2 days
DOR-A12512.0X400	12.00	300	400	12	£77.98	2 days
DOR-A12531/64X315	31/64	250	310	12.3	£60.65	2 days
DOR-A1251/2X250	1/2	200	250	12.7	£60.65	2 days
DOR-A1251/2X315	1/2	250	310	12.7	£77.06	2 days
DOR-A1251/2X400	1/2	300	400	12.7	£101.23	2 days
DOR-A12513.0X315	13.00	250	310	13	£62.02	2 days
DOR-A12513.0X400	13.00	300	400	13	£78.43	2 days
DOR-A12517/32X315	17/32	250	310	13.49	£62.02	2 days
DOR-A12514.0X315	14.00	250	310	14	£72.96	2 days
DOR-A12514.0X400	14.00	300	400	14	£85.73	2 days
DOR-A1259/16X315	9/16	250	310	14.29	£73.42	2 days
DOR-A12537/64X315	37/64	250	310	14.68	£73.42	2 days
DOR-A12519/32X315	19/32	250	310	15.08	£73.42	2 days
DOR-A12519/32X500	19/32	400	460	15.08	£98.50	2 days
DOR-A1255/8X315	5/8	250	310	15.88	£73.42	2 days
DOR-A1255/8X500	5/8	400	460	15.88	£98.50	2 days
DOR-A12511/16X315	11/16	250	310	17.46	£73.42	2 days
DOR-A1253/4X315	3/4	250	310	19.05	£74.78	2 days
DOR-A1253/4X500	3/4	400	460	19.05	£100.78	2 days

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