Tapers

January 1, 2018 Nigel 0

Jacobs Taper The Jacobs Taper (abbreviated JT eg JT0 or JT3) is commonly used to secure drill press chucks to an arbor. Taper Large End Small End Length Taper/ Foot Taper/ Inch 1/2 Included Angle [more…]

Twist Drill Basics

November 27, 2017 Nigel 0

There are a number of different forms of twist drill, different base metals, different coatings and an even larger array of ways in which you should sharpen your drill bits. This article has been abbreviated [more…]

Dividing Plate

November 12, 2017 Nigel 0

A plate with evenly spaced holes at a given radius that allow you to rotate a chuck and then hold it precisely at a given number of intervals. This can then be used for gear [more…]

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…]