Where there are applications for heads where the hole pattern can not be attained
by means of the standard adjustable heads, fixed centre multi spindle heads can
be provided. These heads are specifically made to suit any form of hole pattern. Maximum
collet capacity and minimum centre distance for the type, 400, 650, 800, 950
and 1250 fixed centre heads are the same as those for the twin spindle adjustable
heads.
For economy in manufacture, availability of spares and early delivery, many
parts such as spindles, gears and bearings etc. are common to both the standard
adjustable and the fixed centre heads.
When requesting quotations or ordering Gy-Roll fixed centre heads it is
essential to supply the following information:-
- Drawing of component to be drilled or tapped showing hole pattern centre distances.
- Material to be drilled or tapped.
- Drill size or tapping size.
- Name, make and model of the self-feed unit that is to be used. If it is a
unit that we are not familiar with, full technical details will need to be
supplied.
When accurate hole positions are required, it is always necessary to support
the drills in close proximity to the work by means of drill bushes. Under these
conditions it is therefore essential that either bushed jigs or bush plates are
used with both adjustable and fixed centre heads.
