Chain saw, yomwe imadziwikanso kuti chainsaw, ndi macheka onyamula oyendetsedwa ndi injini yamafuta.Amagwiritsidwa ntchito kwambiri podula mitengo komanso kumanga matabwa.Mfundo yake yogwirira ntchito ndikumeta ubweya ndi kusuntha kozungulira kwa masamba owoneka ngati L pa unyolo wa macheka.Macheka a unyolo nthawi zambiri amagawidwa kukhala ma tcheni oyendetsa magalimoto, ma tcheni osayendetsa galimoto, ndi zina zambiri.