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Author Topic: Frame Saw
Ken Hume
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Posts: 429
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Post Frame Saw
on: September 12, 2014, 07:59
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The Frame Saw course held by Running Deer CIC and led by Henry Russell in Devon over the weekend 6/7 September 2014 was a resounding sucess resulting in a group of aspiring green woodworkers and carpenters making 4 medieval style frame saws for use in the hand conversion of timbers in the woodland

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The course was attended by Herbert L Russell who was sponsored by The Oxfordshire Woodland Group. Herbert has very kindly donated his completed frame saw to The Oxfordshire Woodland Group for use in the OWG / SOAG experimental Living Woodland Archaeology project where timbers including cruck blades will be converted in a Chilterns saw pit.

Ken Hume Executive Trustee - Oxfordshire Woodland Group

Ken Hume
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Posts: 429
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Post Re: Frame Saw
on: September 12, 2014, 08:49
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The blade for the frame saw was made from recycled circular saw blade blanks where the previous saw teeth had been sheared off.

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New teeth were puched out from the saw blade blanks using a punch brake fitted with a rip saw tooth profile die.

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The blade was then fited to the frame saw and then the completed saw was put to the test.

A ramped trestle was positioned on a sloping site and a trial log was positioned and secured on the ramp ready for scie-sawing.

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Henry Russell took up position as top dog standing on top of the log that was to be ripped.

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The finished OWG frame scie-saw was assembled and fine tuned.

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The ripping blade is made from a used bandmill sawblade and this was then cleaned and smoothed using emery paper and then oiled to prevent rust.

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The medieval style frame saw produced a very fine kerf pattern when used on a short piece of spiral grained english elm that was scie sawn over a trestle.

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Regards

Ken Hume

Chilterns
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Posts: 169
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Post Re: Frame Saw
on: January 2, 2016, 08:30
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When using the frame solo care has to be taken not to bash the bottom of the saw against the ground when sawing over a trestle as this will damage the side strake tenons.

Controlling saw blade wander is a problem and when considering sawing a long log e.g. say 16ft + then a small deviation at the outset can turn into a major deviation if the saw blade position cannot be corrected. There is some discussion about this on the popular woodworking web forum.

By scie -sawing i.e. ripping the log towards the centre from both ends can effectively halve the length of the log and hence help reduce deviations but also can result in a discontinuity at the "break" point.

Clearly medieval sawyers must have been very skilled and adept at using this type of saw.

Chilterns

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