Metalworking drill bit built to tackle stainless and other hard metals while resisting heat and wear. Durable performance helps tradespeople and home machinists keep jobs moving with fewer interruptions. Is the Rennie Tool Company HSS Cobalt Blacksmith Drill Bit the right choice for stubborn workshop drilling?
⚡ At a Glance
- • Cutting Quality: Robust cuts in high-tensile and stainless steels with heat- and wear-resistant cobalt alloy
- • Best for: Tradespeople and hobby machinists working with stainless, cast iron and hard plastics
- • Not ideal for: Users who only drill softwood or occasional household tasks
Manufactured from HSS Cobalt (HSCO) to DIN338 and BS328 with a 118° point angle. A 12.7mm shank, 76mm flute length and 150mm overall length suit deeper metal-drilling tasks.
Longer edge life - thanks to HSS Cobalt material
HSS Cobalt (HSCO) construction is described as significantly tougher than standard HSS and resistant to heat and wear. The material choice is intended to retain cutting performance under higher temperatures.
Greater durability means fewer blunt tips during runs of hard-metal drilling. Practical result is less downtime for re-sharpening when cutting oil is applied.
Fits smaller chucks - with a reduced 12.7mm shank
A 12.7mm diameter shank is specified, allowing use in chucks sized for that shank diameter. The reduced shank design enables use in smaller drill hosts.
Suitable for pistol and small pillar drills as noted by users. The reduced shank makes the bit usable where a full-diameter shank would not fit.
Deeper holes possible - with 76mm flute and 150mm overall length
Flute length of 76mm and overall length of 150mm are supplied measurements that extend reach beyond short or stub drills. Flute depth is adequate for through-holes in thicker sections.
Gives capacity for deeper metalworking tasks without immediate need for extensions. Practical when drilling thicker plates or components.
✨ The 4 Key Reasons for Rennie Tool Company HSS Cobalt Blacksmith Drill Bit
- DIN338 & BS328 Standards - Consistent geometry for reliable, professional drilling performance in workshop use
- 118 Degree Point Angle - Easier centring and controlled entry on thick metal sections
- HSS Cobalt Construction - Maintains sharpness under heat when used with cutting oil
- Plastic Storage Box - Protects the drill and keeps bits organised between jobs
📋 Technical Details at a Glance
- Category: Drill bit
- Material: HSS Cobalt (HSCO)
- Shank Diameter: 12.7mm
- Flute Length: 76mm
- Overall Length: 150mm
❓ Frequently Asked Questions
Q: Can this drill bit handle stainless steel and high-tensile metals?
A: Yes. The description states suitability for drilling steel and high-tensile stainless up to 1.400N/mm2.
Q: Will the bit fit smaller chucks and handheld pistol drills?
A: Yes. A 12.7mm diameter shank is specified and user feedback reports suitability for pistol and small pillar drills.
Q: How should sharpness be maintained during use?
A: Use of cutting oil is recommended by users, and the HSCO material is noted as resistant to heat and wear, helping maintain sharpness over multiple holes.
🏆 Our Verdict
Ideal for tradespeople and serious home machinists who regularly drill stainless and other hard materials. HSS Cobalt construction, reduced shank and extended flute length combine to deliver durability, reach and practical workshop compatibility. While likely more costly than basic HSS bits, longer service life and reduced downtime make it a sensible long-term investment for frequent use.
