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Manufactured in our own CNC workshops, the sawtooth extension allows a 1/2" or 13mm shanked sawtooth cutter to be used for deeper boring. This is especially useful when making pepper mills and similar items. Carefully machined to be a precision fit, the extension adds a further 150mm to the length of the sawtooth cutter. Please note that these extensions cannot be used with sawtooth bits less than 23mm in diameter.
12 February 2014
Didn't seem to run trueHad to cut down the length of the shaft to fit into morticer machine, only to find out it was out by a fraction of an inch.
31 December 2013
Excellent but watch the sizeI bought some metric Fisch sawtooth bits. The options for the extension are 1/2" or 13mm. The metric Fisch bits have a 12.7mm shank so you need to order the Imperial extension for these, this fits the bit shanks correctly. The metric extension would be too loose. Unfortunately the website does not quote the shank size for imperial sized Fisch sawtooth bits but you would guess they are 1/2" so also require the 12.7mm version which makes you wonder what the 13mm version fits.
6 June 2007
Sawtooth Shank extensioDoes the job. Needed to reduce the chuck end diameter by 2mm to fit the imperial chuck on a geared drill.