Timber Thickness
Drawer side fixed to front with
lapped or rebated dovetails
To achieve a well fitting joint, the
depth of the pins must equal the
thickness of the tails. This is governed
by the position of the template which
can be adjusted.
Although each pair of sides should be
of a uniform thickness, the actual
thickness is not crucial. For the 1/2
inch template use material between
11mm and 25mm thick. For the 1/4
inch template use material between
8mm and 12mm (a packing piece fitted
under the front clamping bar will be
needed with the smaller thickness).
Drawer
front
Drawer bottom
(4 to 6mm plywood)
set into groove routed
into sides and front
Cutting a Test Piece
Before cutting dovetail joints on the
actual workpiece, cut one or several
test pieces so that the correct cutter
height, position of the edge guides and
template position can be confirmed.
Drawer front can be
moulded with a suitable
moulding cutter.
safety in
numbers
BG Rules:
Safety when using power tools and cutting tools is always of
Material (woodchip, swarf
paramount importance. We briefly explain how and why router
wooddust)
removed
by
cutters should meet the or
HOLZ
BG international
standard
to
each
cutting design
edge before using them.
ensure they have a safe and
approved
per revolution
In past years, the reporting of large numbers
of accidents, has led to the establishment of
international standards for the design and manufacture of tools for the woodworking and
plastics industries. The standard is governed by the Holz BG institute in Munich where
rigorous testing is carried out and certificates issued to manufacturers complying with
certain rigid rules.
Rotation
of cutter
Clearance
These rules state specific standards for a router cutter’s design, the materials used,
anglein manufacture. The design must also be of a safety style to
and tolerances
1.
Cutters should conform to a
precise geometric design, and
use high quality materials
complying with specific DIN
specifications to ensure a safe
tool with a high degree of
precision and balance.
2.
The thickness of chip limit must
be a cutting edge projection of
1.1mm over the total length of
the cutting profile. This is to
limit the injury to any part of
the body, that may come in
contact with the rotating tool.
3.
Restricted maximum chip
clearance width, including the
regrinding range as a function
of the cutting flight circle. This
is intended to limit the
kickback energy to a minimum
and to prevent injury to the
user.
4.
Maximum rotation speed is
determined according to the
tool dimension and materials
with the help of a computer
program. The tests include
dynamic balance and overspeed
testing to twice maximum RPM.
reduce risk of injury and possibility of kickback.
Our professional range of router cutters have been designed
and manufactured to the Holz BG standard for a number of
years. Confirmation of this can be found on the shank and on the
packaging of each product. Claims by other manufacturers that
their router cutters have the Holz BG form, e.g. cutters with a round
body, should not be automatically accepted as having passed the
Holz BG test. Cutters conforming to the Holz BG test have a
specific test number. Our test numbers are as follows:
Cutting
angle
BG-TEST
159-001
Autumn 1999
BG-TEST
159-002
Radial relief
of body
Relief
of tip
Gullet
or flute
Rake angle
or hook
Feed
direction
INProfile
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