What size file do I need to sharpen the chain on my BLACK+DECKER chain saw? Support September 23, 2022 18:09 Updated Follow You will need to use a 5/32" or 4 mm file. Related articles What kind of chain is used on the pole pruner, and what size file can I use to sharpen the chain? What type of chain is used with the pruning saw and what size file can I use to sharpen the chain? How can I sharpen the chain on my LP1000 Alligator Lopper? What are the specs of the chain part # 5140162-93 for Black and Decker Electric Chain Saw CS1216? How often should chain saws be oiled? Comments 0 comments Please sign in to leave a comment.