Posted by Destroked 450 on March 27, 2019 at 19:39:53 from (66.38.93.182):
In Reply to: sawmill blade. posted by Fritz Maurer on March 26, 2019 at 20:43:44:
Lead is adjusting the saw so that the leading edge (cutting side) is closer to the carriage head block then the back side of the saw.
Lead is set by adjusting the bearing nearest to the drive pulley to move the mandrel shaft back or forth on the one end.
This causes the mandrel shaft to be slightly out of square with the carriage thus angling the blade so that it closer to the carriage on the cutting side.
Some mandrel shafts have 3 bearings, in that case the middle bearing adjusters are backed off until the lead is set with the bearing nearest the pulley.
Then the middle adjusters or turned in to hold the bearing but must not be adjusted in too much on ether side to cause the shaft to deflect or bow in the middle.
Doing so will mess up the lead and cause stress on the shaft, possibly causing it to break at a later time
When setting the lead one needs to make a mark on the saw blade and measure the distance to the 1st head block on the carriage, then rotate the blade to move the mark to the back of the saw and move the carriage down so that you measure the same spot on the front head block again.
This insures you don't get a bad measurement due to a warped blade or slightly out of line carriage.
We've never ran a 48" but it should run similar to the 52" saws used at the local mill I worked at.
I'm assuming the saw has inserted teeth, if so I recommend a set of carbide teeth, they last much longer and require very little maintenance. Standard inserted teeth require swaging and ether filing or grinding.
Swaging is a learned art, one that I haven't practiced in nearly 20 years since they switched to carbide teeth.
Many years ago saws pulled by steam or low hp engines operated at 400-500 rpm's but that also required the log to be feed thru the saw at a slow speed.
Later with more powerful engines and early electric mills saw speeds increased to the 550-650 rpm range allowing the log to be sawed faster, thus increasing production.
The mill I worked at runs 52" main saws with 150 hp electric motors operating at 725 rpm, for large dia logs they also have a 36" top saw located above and slightly forward of the main saw, this saw is powered by a 50 hp electric motor and runs at 600 rpm. On a small 12" tie log they can cut 4 slabs and product 1 board and a finished 7x9 cross tie in 35-40 seconds.
With a gas or diesel power unit one can adjust the rpm's up or down the find the speed the saw operates at best.
but once the shaft speed is set any good saw shop can hammer a saw blade to operate at that speed.
Upload one or more videos to your post. Photo and video filesizes should be less than 8MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
... [Read Article]
Latest Ad:
2022 John Deere 5045E, 4wd, front end loader and 3rd function with grapple. 120 hrs, 55k new, must sell
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
