The Hand whisk - Figure 1 - costs from
£1.99 to as little as 99 pence from some cheapjack shops in the UK
and the gears are 1 module so they will mesh with any other commercial
gear to that module.
Approximately 24 DP The large gear is Die Cast Mazak - Ø 2 1/2" with 64 teeth and the pinions are Nylon 66 - Ø 1/2" with 12 teeth.
Figure 2 shows the gears after removal from the hand whisk and modification to Meccano standards.
The frame is made of cheap die cast material
(Mazak) which is easily cut with a hacksaw. The shafts are 3/16" Dia steel
and these are removed from the two pinions and the main gear by cutting
flush with a hacksaw and carefully drilling out the pinions to 7/32" (0.218")
Dia in the lathe. The Maccano type Brass bosses are than made to suit
as a light interference fit and drilled and tapped Meccano thread as per
the length and dimensions of a normal 3/8" dia boss.
Scale - Half size approximately
Figure 3 shows a second main wheel with the outer set of teeth removed to produce useful gear toothed flywheel with the gear teeth on the bossed face for compactness.