1.Band tsamba m'lifupi

M'lifupi mwa tsamba ndi muyeso kuchokera pamwamba pa dzino mpaka kumbuyo kwa tsambalo. Masamba okulirapo ndi olimba (zazitsulo zambiri) ndipo amakonda kutsata bwino pamawilo a bandi kuposa masamba opapatiza. Mukadula zinthu zokulirapo, tsamba lokulirapo silikhala ndi mphamvu zochepa zopatuka chifukwa chakumbuyo chakumbuyo, kukadulidwa, kumathandizira kuwongolera kutsogolo kwa tsamba, makamaka ngati chilolezo chakumbali sichikuchulukira. (Monga pofotokozera, tingatchule tsamba lomwe liri ndi 1/4 mpaka 3/8 inchi m'lifupi ndi tsamba "lapakati".)

Chidziwitso chapadera: Mukamachekanso mtengo (ndiko kuti, kuwupanga kukhala zidutswa ziwiri theka lachikulu ngati choyambirira), tsamba locheperako limadula mowongoka kuposa tsamba lalikulu. Mphamvu yodula imapangitsa kuti tsamba lalikulu lipatukire m'mbali, pomwe ndi tsamba lopapatiza, mphamvuyo imakankhira kumbuyo, koma osati cham'mbali. Izi sizomwe zingayembekezere, koma ndi zoona.

Masamba opapatiza amatha, podula kanjirako, kudula kanjira kakang'ono kwambiri kuposa tsamba lalikulu. Mwachitsanzo, tsamba la ¾-inchi-lalikulu lingathe kudula utali wa 5-1/2-inch (pafupifupi) pamene tsamba la 3/16-inch lingathe kudula utali wa 5/16-inch (pafupifupi kukula kwa dime). (Zindikirani: Kerf imatsimikizira utali wozungulira, kotero kuti zitsanzo ziwirizi ndizofanana. Kerf yotakata, kutanthauza utuchi wochuluka komanso kagawo kakang'ono, imalola kudula kocheperako kusiyana ndi kerf yopapatiza. wovuta komanso wongoyendayenda.)

Ndikamacheka mitengo yolimba komanso yofewa kwambiri ngati Southern yellow pine, ndimakonda kugwiritsa ntchito tsamba lalikulu momwe ndingathere; matabwa otsika amatha kugwiritsa ntchito tsamba locheperako, ngati lingafune.

2.Band tsamba makulidwe

Nthawi zambiri, masambawo akamakulirakulira, m'pamenenso amakangana kwambiri. Masamba okhuthala amakhalanso masamba okulirapo. Kukakamira kochulukira kumatanthauza kudulidwa mowongoka. Komabe, masamba okhuthala amatanthauza utuchi wambiri. Masamba okhuthala nawonso amakhala ovuta kupindika mozungulira mawilo a bandi, kotero ambiri opanga ma bandsaws amafotokozera makulidwe kapena makulidwe osiyanasiyana. Mawilo ang'onoang'ono a diameter amafunikira masamba ocheperako. Mwachitsanzo, gudumu la mainchesi 12 nthawi zambiri limakhala ndi tsamba la makulidwe a 0.025-inch (pazipita) lomwe ndi inchi ½ kapena kuchepera. Gudumu la mainchesi 18 litha kugwiritsa ntchito tsamba lokhuthala la 0.032 inchi lomwe ndi mainchesi ¾ m'lifupi.

Nthawi zambiri, masamba okhuthala ndi otambalala adzakhala chisankho pakucheka matabwa olimba ndi matabwa okhala ndi mfundo zolimba. Mitengo yotereyi imafunika mphamvu yowonjezereka ya mpeni wokhuthala, waukulu kuti usathyoke. Masamba okhuthala nawonso amapatuka pang'ono akamachekanso.