Buy Power Hacksaw Blades Online in Australia
Power Hacksaw Blade Selection — Quick Reference
Power hacksaw blades are the long heavy-duty hacksaw blades used in mechanical power hacksaws — reciprocating-action steel cutting machines for production cutting of bar + structural sections + tube. Slower but very accurate vs bandsaw, used where finish + dimensional accuracy matter.
| Blade Spec | Best For | TPI Guide |
|---|---|---|
| HSS All-Hard Blade | Production cutting carbon steel + light alloy | 6-14 TPI per section thickness |
| HSS Bi-Metal Blade | Mixed material + structural sections — flex-tolerant | 6-10 TPI |
| HSS Cobalt M42 Blade | Stainless + tough alloys + production volume | Same TPI range — longer life |
| Carbide-Tipped Blade | Hardened steel + high-volume production | Per spec — premium for harder substrates |
| 14 TPI (Fine) | Thin-wall tube + sheet + small section | Wall thickness ≤3mm |
| 10 TPI (Medium) | Workshop standard — most structural sections | Wall 3-12mm |
| 6 TPI (Coarse) | Thick solid bar + heavy structural | Solid stock + thick sections |
3-tooth rule: always have at least 3 teeth in contact with the workpiece at any time. Too few teeth = catastrophic blade damage; too many = chip clogging. Common dimensions: 350mm × 32mm × 1.6mm (workshop standard), 450mm + 525mm for heavier machines. Cutting fluid mandatory on power hacksaw — extends blade life 3-5×. Brands: Excision, Bordo, Sutton Tools. Companion: hand hacksaw blades, circular saw blades, cutting lubricants, cut-off discs.
People Also Ask — Power Hacksaw Blades
Q: What is a power hacksaw blade?
A power hacksaw blade is a long, heavy-duty reciprocating blade used in mechanical power hacksaws — stationary machines that cut bar stock, structural sections, and tube by a motorised back-and-forth sawing action. They are longer and heavier than hand hacksaw blades, designed for the higher loads and continuous duty of machine cutting.
Q: How do I choose the right TPI (teeth per inch) for a power hacksaw?
Select TPI by the wall thickness of material being cut. 14 TPI suits thin-wall tube and sheet up to approximately 3 mm wall thickness. 10 TPI is the workshop standard for most structural sections with walls of 3–12 mm. 6 TPI suits thick solid bar and heavy structural sections. The 3-tooth rule applies: always keep at least 3 teeth in contact with the workpiece — too few teeth causes tooth stripping and premature blade failure.
Q: What is the difference between an HSS all-hard and an HSS bi-metal power hacksaw blade?
An HSS all-hard blade is made from a single high-speed steel alloy throughout — harder and more wear-resistant but more brittle and prone to tooth breakage on mixed materials or vibration. A bi-metal blade has HSS teeth welded to a flexible spring steel body, giving the cutting edge hardness of HSS with the flexibility of spring steel — better suited to structural sections, mixed materials, and applications where blade flexing could snap an all-hard blade.
Q: When should an HSS cobalt power hacksaw blade be specified?
HSS cobalt (M42) blades are specified for stainless steel, tough alloys, and high-production cutting where extended blade life is the priority. The cobalt content increases hot hardness and wear resistance, maintaining cutting efficiency over longer production runs than standard M2 HSS blades.
Q: Is cutting fluid required on a power hacksaw?
Yes. Cutting fluid is mandatory on power hacksaws — it cools the blade and the cut, lubricates the teeth, and extends blade life significantly compared to dry cutting. Always apply the appropriate cutting fluid for the material being cut; dry cutting on metal generates excessive heat that rapidly dulls or damages the blade teeth.
Q: Power hacksaw or bandsaw — which should I use?
A power hacksaw cuts more slowly but gives an accurate, clean cut, which suits production cutting of bar and structural sections where finish and dimensional accuracy matter. A bandsaw is faster and more versatile for higher throughput and shape cutting. Choose the power hacksaw for accuracy on solid stock at moderate volume.
Q: What blade dimensions do power hacksaws use?
Power hacksaw blades are sized by length × width × thickness. The workshop standard is 350 × 32 × 1.6mm, with 450mm and 525mm blades for heavier machines. Measure the old blade or check the machine's frame and stroke before ordering — the blade must match the machine's pin centres and tensioning range.
Q: Which way should the teeth face when fitting a power hacksaw blade?
Fit the blade with the teeth pointing forward, in the direction of the cutting (push) stroke, and tension it to the machine's specification. A blade fitted backwards won't cut and a slack blade wanders and strips teeth — check tooth direction and tension every time you change a blade.
Q: Why do power hacksaw teeth strip or break?
Usually too few teeth in contact (breaking the 3-tooth rule on thin material), the wrong TPI for the section, insufficient blade tension, cutting dry, or feeding too aggressively. Match TPI to the section thickness, keep at least three teeth engaged, tension correctly, and always use cutting fluid to keep the teeth cool.
Q: Can a power hacksaw cut stainless or hardened steel?
Yes, with the right blade. Use an HSS cobalt (M42) blade for stainless and tough alloys, and a carbide-tipped blade for hardened steel or high-volume production. Run slower with plenty of cutting fluid — stainless in particular work-hardens if the blade rubs instead of cutting, so keep the feed positive and the teeth sharp.