Replies

1. 
   philip | Sep 16, 2008 12:39pm | #1

   Rabin,
   Do you have an operator manual for that machine?
   In general a choice of speeds is desirable if one runs various types of blades and cuts a range of materials. When you buy blades the maker usually states the optimum speed to run at - usually feet or meters per minute. Basically: speeds for wood are medium to fast for ripping , cross cutting and re-sawing , but you want to go slower if cutting sharp curves.
   Speeds for non ferrous metals, masonite, ivory (!) and bone would be described as medium to slow.
   Speeds for ferrous- very slow and beyond the scope of your machine unless you can slow it down via other means such as gear box or variable speed motor etc,.
   A fast speed: 2500 feet per minute plus.
   A medium speed: around 1500 fpm
   A slow speed: " 500 fpm
   A very slow speed " 150 fpm
   In general I believe that for some reason blade manufacturers like to over state the optimum speeds, whilst machine manufacturers may also have their own agendas.I feel that it better to err on the slow side.
   So, if I were you, I would try whatever speeds the machine has available , with various wood cutting blades. There are many other variables such as your feed speed, number of teeth per inch and width of blade to get into the mix as well.

   Philip Marcou
1. 
   rabin | Sep 17, 2008 01:20am | #2

   Hi Philip

   Thanks for the info.   Yes I do have the Delta Manual ,but it does not explain the reason for the two running speeds.   I will contact my supplier re the recommended blade speeds.

    

    

    

   Edited 9/16/2008 6:21 pm ET by rabin

2. 
   WillGeorge | Sep 17, 2008 01:32am | #3

   Philip.. As usual..

   Right on AND you can understand it.

2. 
   mattybill3 | Sep 18, 2008 01:32am | #4

   This is a combo saw for cutting wood and metal.High for wood and slow for metal

1. 
   RickL | Sep 18, 2008 10:45pm | #5

   http://toolsandmore.us/index.asp?PageAction=VIEWPROD&ProdID=488

   If it's a similar saw you can cut some non-ferrous on the low speed (2300 fpm) but steel requires a much lower speed such as 200 to 500 fpm and typically uses a gear box to reduce the speed. So saying the low speed is for metal isn't really correct in the broadest sense of the term metal.