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Downham (Elliott and Gate) Mini Jig Borer
Co-ordinate Drilling & Milling Machine
Page 2
Mini Jig Borer Home Page   Page 3   Dimensions   Excel No. 1 Borer
An Instruction Manual is available for these machines

6-inch rotary table

Boxed Boring Head set

Brown & Sharpe 00 collet set in their door-mounted storage rack

Balas Collet for the Mk. 2 and Mk. 3

On Mk. 2 and Mk. 3 models a Newhall-Balas "Type C6" was provided as standard. Like the collets for the Mk. 1 these were still pushed in on their nose, were tapered for their full length and had to be removed with  a special extractor. In the manual for the Mk. 2 a specific instruction was given for including a needle-roller thrust bearing and washer in the collet nosepiece assembly, although this was omitted on the Mk. 3.

Table feed screw metric micrometer dial Mk. 3

Cross-feed detail Mk. 3 showing the adjustable stops and built-in ruler

Detail showing quill feed engagement lever and knock-off arrangement

Home    Machine Tool Archive    Lathes, Millers, Shapers, Grinders for Sale
E-MAIL   Tony@lathes.co.uk   

Downham (Elliott and Gate) Mini Jig Borer
Co-ordinate Drilling & Milling Machine
Page 2
Mini Jig Borer Home Page   Page 3    Excel No. 1 Borer
An Instruction Manual is available for these machines