Robert Sorby varekatalog Robert Sorby catalogue 2018-2019 | Page 55

Sharpening Systems
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The Universal Sharpening System is a simple jig which is to be used in conjunction with a conventional bench grinder to
sharpen an array of tools without the need for complex adjustments. The system itself comes in three formats – a fingernail
profiler (ref. 445) for turning gouges, an adjustable platform (ref. 446) for other turning chisels, bench chisels, and plane irons
and a deluxe combination of the two (ref. 447).
FINGERNAIL PROFILER
The Fingernail Profiler (ref. 445) is designed to aid the turner who has difficulty in sharpening his bowl and spindle gouges
free hand. Typically problems which recur from free hand sharpening are the appearance of facets on the bevel leading to
a less than perfect finish on the project, inconsistent shapes, and the unnecessary grinding away of valuable tools.
Facets are caused by differential pressure being applied to the tool against the grinding wheel. The geometry of the
Fingernail Profiler ensures that only regular pressure can be applied thereby ensuring a clean, ‘as new’ finish on the
bevel every time. By ensuring that the same length of tool is protruding from the jig – and this length may well differ
from one tool to another – the same will always be replicated whether the user prefers a long grind, a conventional
square grind or anything in between.
One useful tip when using the Fingernail Profiler is that once the turner is comfortable with a particular shape it
is advisable to make a mark or a bench stop so that he goes back to exactly the same length every time.
That in turn ensures that the desired shape is replicated. And because the same shape is replicated the
amount of material removed is minimal thereby producing immediate cost savings.
445
Ref
445 Description
Fingernail Profiler
445/447UPG Fingernail Profiler Upgrade
(Upgrades 445 into 447)
i
UNIVERSAL SHARPENING SYSTEM
The Universal Sharpening System (ref. 446) simplifies the sharpening of more square or rectangular tools, like
bench chisels, plane irons and turners’ scrapers. There are also some optional extra jigs which also make it ideal
for roughing gouges and skew chisels.
The System itself is adjustable for height and so can be used in conjunction with a 6", 7" or 8" bench grinder. The
angle of the platform is also adjustable to cater for the different bevel angles appropriate to tools – a handy angle
finder is included to help set angles consistently.
The design also incorporates two nice features. Firstly the adjusting nuts are held captive so there is no fear of
losing them in saw dust and shavings. Secondly there are screw slots – rather than screw holes – so that as the
grinding wheel wears the System can be moved closer to the bench grinder.
In order to use the extra jigs an Adaptor Table (ref. 447JAT) needs to be
fitted to the platform.
This features a groove into which extra jigs can be positively located to
give extra control (see footnote on page 58).
Ref
446 Description
Universal System
446/447UPG Universal System Upgrade
(Upgrades 446 into 447)
447JAT Secondary Table top with slide way
(Accepts jigs on page 52)
446
447JAT Jig Adaptor Table
DELUXE UNIVERSAL SHARPENING SYSTEM
By far the most popular option is the Deluxe Universal Sharpening System (ref. 447) which combines the best
features of the Fingernail Profiler (ref. 445) and the Universal Sharpening System (ref. 446). The reason is that
in one unit there is the option of a wide range of woodworking tools. It is compact, flexible, solidly constructed
and easy to use. It takes all the guesswork out of returning tools to a more usable condition. Sharp tools make
work so much more of a pleasure and take away a lot of frustrations. Always remember the key to good
sharpening is little and often – do not wait until tools are blunt and practically unusable. All three options
come with comprehensive fitting instructions. In order to use the extra jigs an Adaptor Table (ref.
447JAT) needs to be fitted to the platform.
Ref
447
Description
Deluxe Universal System
LONG GRIND JIG
Using the long grind jig on the Fingernail Profiler, Deluxe Universal Sharpening System or the ProEdge allows
for three different types of profile to be produced on bowl and spindle gouges. It will produce a fingernail
profile, a long grind and an extra long grind depending on which location hole the profile arm is used.
It fits onto the bar in replacement of the original fingernail jig that is standard on either of the two sharpening
systems and is used in exactly the same way but with the three options.
Ref
PELGJ
Description
Long Grind Jig
PELGJ
3
1
2
3
2
1
Example
Examples
es of the profiles that can be
achieved using the Long Grind Jig
447