Phosphor Bronze

September 3, 2018 Nigel 0

An alloy of copper with 3.5 to 10% of tin and a significant phosphorus content of up to 1%. PB1 is a continuously cast product used for machined components washers and bushes. PB2 This has [more…]

EN8

August 26, 2018 Nigel 0

I needed to make some long double ended bolts for a friend who’s restoring a motorbike. After some searching we decided on EN8: EN8 Engineering Steel is an unalloyed carbon steel with reasonable tensile strength. [more…]

Steel

August 11, 2018 Nigel 0

An iron-based alloy containing carbon, and other alloying elements eg manganese. Steel contains anywhere between 0.2% carbon for soft wire and sheet steel and 1.5% carbon for cutting tools. A work in progress as I [more…]

High Speed Steel

January 14, 2018 Nigel 0

Abbreviated HSS and commonly just listed or desicribed as HSS. A hard steel used for metal cutting tools as it remains hard even at dull red temperatures. It normally contains: Tungsten 12 to 18%, Chromium [more…]

Pewter

May 28, 2017 Nigel 0

The image shows a pewter flywheel on a solenoid engine. The outer surface has a hammered finish. Traditionally pewter is an alloy containing 80% tin and 20% lead. Modern pewter is 85 to 95% tin with [more…]

Parting Aluminium on the Lathe

April 2, 2017 Nigel 0

Parting off aluminium in the lathe can be nerve racking and especially if you’ve got it wrong in the past and either the work piece has come out of the chuck or the tool has [more…]

Machining Cast Iron

March 18, 2017 Nigel 0

There are a number of different grades of cast iron and within these there are a number of different qualities depending a lot on the casting method. Sand castings that are found a lot in [more…]

Cast Iron

March 18, 2017 Nigel 0

Cast iron tends to be brittle, except for malleable cast irons. With its low melting point, good fluidity, castability, excellent machinability and wear resistance, cast irons have become an engineering material with a wide range [more…]

Silver Steel Cutting Speeds

February 5, 2017 Nigel 0

The recommended cutting speed for silver steel is 15 to 25m/min Using this speed I’ve created the following table of cutting speeds: Diameter of material [mm] Spindle speed [rpm] Roughing Spindle speed [rpm] Finishing 3 [more…]

Carbide or Tungsten Carbide

June 25, 2016 Nigel 1

Nowadays tools are often referred to as being made from “carbide” – what they actually mean is Tungsten Carbide. The reason for using Tungsten Carbide is it has some great properties: melting point 2,785–2,830°C hardness of [more…]