Woodwork Technology
I will use this page to test out some features.
Timber Defects edit
Wood Warping edit
- To understand why such defects occurs needs an understanding of tree growth, conversation of the lumber (timber), and seasoning. 'Warping' as such is a generic term for some of the defects caused by some irregularity or problem during the growth, conversion and seasoning plus eventual storage.
More Defects? edit
The various warping categories listed in Wood warping are also defects and should be included in this article.
Warping is a defect caused by a problem in conversion and seasoning of lumber (timber) and should not be treated separately.
Lumber edit
The article Lumber includes defects but omits warping?
The two should be joined.
Oilstones edit
Most whetstones are lubricated by using various types of oils and water.
It is not particularly for the benefit of the iron but for the stone.
An iron being honed on a stone or other abrasive device creates particles of iron and abrasive which clog the pores of the stone and thus 'slows' down the process.
Perhaps a single iron being honed on a clean dry stone may produce a good edge but the condition of the stone will not be fit for another session without extensive and perhaps difficult cleaning.
Using a light oil provides a fast edge which is rabidly absorbed into the stone, and heavier oils are slower cutting but provides a more durable surface to suspend the debris.
Water is just another type of lubricant but requires the stone to be held in a special made water trough as a reservoir.
Geoff (talk) 15:43, 25 September 2009 (UTC)
Timber sizes edit
We do see to be getting into complicated discussions over timber sizes.
Timber may be supplied rough sawn or planed/dressed and the dressed size could less than quarter of an inch or 6mm less than the specified size.
This is called the nominal size or 'EX'. On contracts such as for domestic buildings this would be specified and there should be no misunderstanding.
Geoff (talk) 19:52, 25 September 2009 (UTC)
Lengths
Commercially, in the UK, Lumber/Timber may be supplied in stock lengths, 1.80 M to 7.20 Metres. Lengths of multiples of 300 mm can be supplied. Odd lengths are usually sold to the nearest usable 300 mm and charged accordingly.
See TRADA Web Site, Solid Timber: Sections and Sizes.
But site may require membership?[1]l
Hardwoods are usually are supplied under the rules of the imported timber but most UK Timber Yards sell to the basic NHLA rules as adopted in the UK.
Geoff (talk) 14:32, 29 September 2009 (UTC)
Arkansas and Washitas stones edit
- I think you meant Arkansas and Washita stones? They may well be available still but the new DMT Diamond and Ceramic stones are far more durable, stay flat and probably much faster?
- Japanese stones are very good but need far too much preparation and maintenance.
Geoff (talk) 09:09, 26 September 2009 (UTC)
- I think you meant Arkansas and Washita stones? They may well be available still but the new DMT Diamond and Ceramic stones are far more durable, stay flat and probably much faster?