Blog List
Induction Hardening and Tempering for CNC Shafts
A shaft drawing can call for a hard journal while leaving the ends of the hardened zone undefined. That gap…
Centerless Grinding Process: Which Shaft Shapes Fit?
A straight pin and a shouldered shaft may need the same finished journal diameter, yet require different grinding routes. The…
Plastic Creep: Follow the Part Through Loading and Recovery
A machined plastic support may keep a fixture clear of its base when first loaded, then allow the gap to…
Grooving in Turning: How the Groove Controls the Cut
A 4 mm-wide groove does not necessarily need a 4 mm-wide insert. It may be formed with one full-width cut…
A Transition Fit Can Produce Two Assembly Outcomes
With a transition fit, a replacement shaft can meet its diameter limits and still assemble differently from the shaft it…
Hardness Testing: Plan the Indent Before Machining
Rockwell, Brinell and Vickers hardness tests leave an indentation. On a finished machined part, that mark may be unacceptable on…
NPT Thread Specs for Machined Ports
A 1/4-18 NPT port is not a 1/4-inch-diameter hole. The callout identifies a nominal pipe size, 18 threads per inch…
Steel–Aluminum Galvanic Corrosion in Bolted Assemblies
An insulating washer under a bolt head can leave a steel–aluminum joint electrically connected. The bolt shank may touch the…
Keyway Machining: Fit the Key, Shaft and Hub
Keyway machining should be specified around the fit of the shaft, key and hub. Slot width matters, but so do…
