Tap Wrench

September 3, 2017 Nigel 0

A hand tool that can be locked onto the square post on the tap and used to apply a torque to cut an internal thread. When using a tap wrench it is usual to turn [more…]

Nuts & Bolts

August 26, 2017 Nigel 0

A page about everything nuts and bolts. I’ve tried to list them A to Z, but sorry if I’ve missed something. Bolt – a cylindrical threaded fastener with a head that is formed to allow torque [more…]

Oil & Lubrication

August 19, 2017 Nigel 0

Liquid that reduces friction or wear, or both, between the moving parts within an engine; removes heat, particularly from the underside of pistons; and serves as a combustion gas sealant for the piston rings. Thicker [more…]

Spark Plug

August 13, 2017 Nigel 0

A model engine spark plug can vary in size, but 1/4” x 32 is common as it fits the same thread and rough dimensions of a model engine glow plug. I took this photo to give [more…]

British Association Threads

August 5, 2017 Nigel 0

A British system of threads with 47.5° included angle with rounded roots and crest. Even numbers are the preferred sizes. Favoured by model engineers, Stuart Turner models are traditionally supplied with odd numbered BA nuts [more…]

Metric Threads

July 30, 2017 Nigel 0

The most commonly used type of general-purpose screw thread, one of the first international standards agreed when the International Organization for Standardization was set up in 1947. Metric threads are becoming more common in model [more…]

Gear Noise

July 15, 2017 Nigel 0

Gear whine – Generated by meshing gears due to the vibration caused by failure of the rolling action between the mating teeth due to: Minute imperfections in manufacture of Tooth pitch circle (radius and centre) [more…]

Gear Design

July 2, 2017 Nigel 0

Fundamentally we there are a few different gears: Bevel Gear – Conical shaped gears, the angle between the input and output shaft is anything except 0 or 180°. Double Helical Gear – The double helical [more…]

Centre Drill Profile

June 30, 2017 Nigel 0

I use centre drills all of the time, usually as a pilot drill in the lathe to give me a good starter for a larger drill. However, whey are they the profile they are? A [more…]