ESSENTIAL TOOLS

A BASIC INDEXING TOOL

© Mike Dennis 1993/2002


Made with Meccano parts. See below for details.
 

Fig 1 - The complete tool with a Mecarep 145 type Ø 7-1/2" Flat Ring in position for spot drilling an extra 8 holes using a 16DP pinion.
 
 
 
 
 

PARTS AND INSTRUCTIONS.

Parts:
2 x No1 Meccano strips - One any colour, the other BZP. (The BZP No 1 strip will be referred to as
Part 1)
1 x 167c pinion ( preferably with the face width reduced to 1/8" )

Instructions:
1. Convert two Cheese headed bolts as shown in Fig 1 - Top left.

2. Drill the centre hole in the Part 1 (BZP) strip 3/8" Dia clearance for it to revolve on the boss and serve as the position indicator (left Fig 2 below) and fit the converted bolts with nuts as shown.

3.  Referring to the coloured no 1 strip Right Fig 2 Below:

1.    Drill two x 8 B.A. clearance (Ø 3/32") on 1/2" PCD each side of the centre hole with the pinion clamped in position using a short axle rod as a dowel in the centre.

2.    Fit 2 x 8 B.A. x 1/4" long Screws and nuts as shown - Note Make sure that the pinion is positioned with the roots of the opposite teeth relative to the Meccano holes in the strip as shown
 

 Fig 2 - Not to Scale
 
 

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