2 PCS 8mm x 500mm (0.315 x 19.69 inches) Vigorous Linear Motion Rods, Case Hardened Chrome Shaft Linear Rail Rod Shaft for 3D Printer, DIY, CNC - Metric h8 Tolerance

Very smooth and straight. These are rigid as well, which is important at 450mm. No binding or noise from the bearings. Really impressive given the price.

Verry nice Quality , strong for my project of a rock tumbler.....

Super sturdy. Can easily support my full body weight without permanently deforming. I have this rotating in a set of two bearings about 2.5 feet apart, and it's critical that the axel stay very straight, and this rod has done awesome. Hard enough that the set screws don't chowder the surface when they are locked in place, but not so hard that the set screws just slide over the surface.

The skin is very hard, use a carbide insert to turn or cut. The core is about 40-50HRC, can drill and thread without annealing.

I built a 20" band saw and purchased 1" bearing and a 1" shaft. Even with freezing the shaft I couldn't get it onto the bearings. So, I purchased this. Since it isn't driving a gear, It's OK that the bearings fit a little loose (nothing a small shim made from a strip of aluminum from a pop couldn't fix). I used a grinder to cut this shaft into two 250mm lengths for the upper and lower bandsaw wheel shafts. The chrome is nice since there is 90% humidity where I live at times and I don't have to worry about it rusting.

This shaft is incredibly good value when compared with other linear guide shafts available from industrial supply houses like McMaster. The diameter is within the h8 tolerance, just as stated. The shaft is case-hardened and can be cut with carbide parting tools. The shaft center is soft and can be drilled and tapped with conventional HSS tools.

Decent shafts for use in my bearings.

Perfect 10 mm straight and sturdy

Excelente

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