Irwin
Irwin IRWIN® HSS Pro TiN Coated Drill Bit 8.5mm OL:117mm WL:75mm 10502596
Model 10502596
Best price
Lowest we’ve seenWhere to buy
| Retailer | Price | Availability | Visit |
|---|---|---|---|
| Cheapestchecked an hour ago | £3.49£5.24 | In stock | Visit Tooled Up (opens in a new tab) |
 checked an hour ago | £3.77 | In stock | Visit Blueperry agriculture (UK) (opens in a new tab) |
 retailer's price from 16 Jul 2026 | £4.99 | In stock | Visit Blueperry Tool & Builders Merchants (UK) (opens in a new tab) |
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Price history
Full price historyThis is the lowest price we have recorded. If you were waiting for a drop, this is it.
About this product
This Irwin HSS Pro drill bit is an 8.5mm diameter bit with an overall length of 117mm and a working length of 75mm, supplied singly. It is designed for drilling metal and harder, tougher alloys, suiting precision engineering and fabrication work where an intermediate 8.5mm size is needed.
The bit is made from HSS steel coated with 2.5µ Titanium Nitride (TiN), giving a hardness of around 80 HRC and good wear resistance. Compared with standard HSS bits, speed can be increased by 40-60% and feed by 10-20% without significantly reducing tool life. TiN's low friction and poor heat conduction divert heat into the chips and coolant rather than the bit itself.
A 135° split point tip ensures accurate centring and reduced drilling pressure, minimising walking and the need for pilot holes.
Features and Benefits
- :
- 8.5 x 117mm dimensions for precision metalwork
- 40-60% faster drilling speeds with TiN coating
- 135° split point provides accurate hole positioning
- Extended length suitable for deep hole drilling
- Low friction coating extends tool performance life Specifications: Tip Diameter (mm): 8.5 Working Length (mm): 75 Overall Length (mm): 117 Pack Qty.: 1
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