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Pine Boards with a Chainsaw Mill
A chainsaw mill is a frame that holds the saw's bar flat at a set height, so the chain rips a log lengthways into boards. The first cut rides on a straight board screwed to the log; every later cut rides on the flat face before it. The green boards are then stacked on stickers to air-dry.
Pine dries fast: a 25 mm board can reach about 14 % moisture in 60 to 90 days in good drying weather. Oak and other slow species take far longer.
Ophakathi
1 day milling, 2–3 months drying
Imiyalelo
1
1
Pick and prop the log
Pick and prop the log
Choose a straight pine log, 2.5–3 m long, without large knots. Prop it on two short logs so it cannot roll and the chain will not reach the ground.
Izinto zokwakha zalesi sinyathelo:
Izigodo zokhuni oluthambile1 ucezuAmathuluzi adingekayo:
Ithephu Lokulinganisa2
2
Fit the mill
Fit the mill
Bolt the mill to the chainsaw bar following its maker's instructions. A ripping chain cuts along the grain faster and smoother than a crosscut chain.
Amathuluzi adingekayo:
I-chainsaw (ibanga lochwepheshe lwamahlathi)
Uhlaka lwesaha lomshini3
3
Screw on the guide board
Screw on the guide board
Screw a straight board along the top of the log, level from end to end, as the rail for the first cut. Check it with the straightedge and level.
Izinto zokwakha zalesi sinyathelo:
Izikulufu zokhuni6 izicucuAmathuluzi adingekayo:
Ipulangwe lomphayini
Ibhola Elingenantambo
Umphetho oqondile
Isilinganiso Sokulingana4
4
First cut
First cut
Wearing helmet with visor, ear protection, gloves and boots, run the mill along the guide board and take off the top slab. Remove the guide board.
Amathuluzi adingekayo:
I-chainsaw (ibanga lochwepheshe lwamahlathi)Uhlaka lwesaha lomshini
Isigqoko sokuphepha
Izivikeli zendlebe
Amagilavu Omsebenzi Esikhumba
Izicathulo zokuphepha ezinensimbi phambili5
5
Cut the boards
Cut the boards
Set the mill a few millimetres thicker than the finished board, to allow for shrinking and planing. Run each cut on the flat face left by the one before.
Amathuluzi adingekayo:
I-chainsaw (ibanga lochwepheshe lwamahlathi)Uhlaka lwesaha lomshiniIthephu Lokulinganisa6
6
Seal the ends
Seal the ends
Paint both ends of every board with end sealer the same day, to stop them splitting as they dry.
Izinto zokwakha zalesi sinyathelo:
Isivali sesiphetho (i-paraffin wax)0.5 ilitha7
7
Sticker the stack
Sticker the stack
On a level base at least 30 cm off the ground, lay the boards in layers with a gap between them, each layer on stickers every 40–60 cm, the stickers one above the other.
Izinto zokwakha zalesi sinyathelo:
Isihlukanisi sokhuni (isikhala sokomisa)30 izicucuAmathuluzi adingekayo:
Ipaledi lokhuniIsilinganiso Sokulingana8
8
Cover and weight
Cover and weight
Cover the top of the stack against rain and lay weight on it to keep the top boards flat; leave the sides open to the air.
Amathuluzi adingekayo:
Isihenqo esingangeni manzi9
9
Measure the moisture
Measure the moisture
After 2 months, read a board from the middle of the stack. Air-dry outdoors reaches about 12–15 %; bring boards for furniture indoors to settle at 6–8 % before working them.
Amathuluzi adingekayo:
Imitha yomswakama10
10
Troubleshooting
Troubleshooting
Chainsaw milling troubleshooting.
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