Drill Bit Point Angle: 118° vs 135° and When to Use Each
A practical engineering guide to 118° and 135° drill points, split points, materials, machine conditions and inspection requirements.
Article Finder
Browse by category, then jump directly to one of the articles on this page.
A practical engineering guide to 118° and 135° drill points, split points, materials, machine conditions and inspection requirements.
A practical buyer guide to M35/M42 cobalt and solid-carbide drill bits for hardened steel, including point geometry, coatings, speeds and failure diagnosis.
A practical dial-indicator procedure for separating circular saw blade runout from arbor, flange, bore-fit and mounting errors.
A practical guide to flood coolant, MQL, nozzle placement, concentration, filtration and troubleshooting for aluminum and steel sawing.
A practical guide to TCT saw blade resharpening, retipping, body inspection, service limits and cost-per-cut decisions.
Calculate saw blade kerf loss, usable material yield and total cost per accepted cut, with a practical 250mm aluminum bar example.
A practical comparison of M35 and M42 cobalt drill bits for stainless steel and harder metal drilling.
A practical buying guide for step drill bits used in sheet metal, electrical panels, HVAC work and aluminum plates.
A practical buyer guide for drilling aluminum sheet, plate, extrusion and cast aluminum without chip welding or oversized holes.