Duncans Metal Pages
Wheel head
Last updated: 30 Apr 2017

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The Wheel Head

The wheel head couples the spindle and the motor together and allows for height adjustment.  It can also be swung radially to present the wheel at different angles to that normally used.

200: Collar

Casting 22-Apr-06: The collar is being faced so it has a flat end to stand on.
Ream The flat face allows the collar to be set up to have the hole drilled and reamed for the split collet.  With the split collets, the holes for them are drilled very early on so that the main hole can be bored with the collets in situ.
Boring Boring the collar out to 1.250" with the split collet (currently in one piece) bolted through the casting.
Bored casting By bolting the collet in before the main boring operation, it will always be a good fit.

201: Bracket

Bracket 23-Apr-06: The bracket on the faceplate to get one side faced off - it only just fits.
Bracket 2 The setup for boring the bracket.  Having already drilled the 5/16" BSW holes for the motor mounting plate, these are being used to secure the bracket to the angle plate.
Bracket 3 Milling some cutouts in the casting.  Without these the range of height adjustment is very limited.
Current That's it for now, need some 3/16" steel plate to make the motor mount from and a larger capacity knurling tool.

210: Motor mounting plate

Plate 17-Aug-06: Marking out is not one of my favourite jobs, so the easy wasy is to print out what will be on the plate and stick it to the metal.  3M Spray Mount adhesive is used - it's expensive stuff but does a superb job.
Plate 2 The plate in position.  One bizarre thing is that the holes for the motor mounting don't quite line up with the pilot holes in the Parvalux SD13 motor.  The drawings show a 68mm PCD, the motor measures up around 67.5mm.

As an update to the motor hole PCD, I had a look at the Parvalux drawings and they show 67.6mm as the PCD, not the 68mm shown in the drawings and the book.

202: Belt cover

Cover 09-Sep-06: This is an unwieldy shape to hold the wrong way up, but that's the way it needs to be to counterbore the securing holes from behind.

203: Wheel guard

Reaming 01-Jan-07: The wheelguard is getting the luxury of a split cotter along with all the other assemblies.  A 0.5" hole is being reamed through to hold the cotter blank before boring the 1-3/8" hole in the centre.
Drilling Not quite sure how to tackle the curved cutout, I slot drilled about 7 or 8 holes to get the rough shape and used a boring head to clean up.
 

These pages are maintained by Duncan Munro.  All content on this site is Copyright ©2002-2017 Duncan Amplification.
Warning: These pages consist of images and descriptions of equipment which can reach high temperatures creating hazardous and potentially dangerous situations.  These pages should not be taken as a step by step guide on how to construct any items or carry out any particular procedure, nor should any references to safety contained herein be taken to guarantee safety in all situations.