Thanks: 0
Likes: 0
Needs Pictures: 0
Picture(s) thanks: 0
Results 1 to 7 of 7
Thread: tension
-
18th April 2015, 06:34 PM #1
tension
I have a 14 inch Powermatic brand bandsaw, recently i found that when I tried to tension the blade by turning the blade tension knob, the slide bracket would not move, all that appeared to happen was the spring in the slide bracket would compress, as a result of this I believe that the thread on the blade tension knob has become cross threaded, it will still wind up and down, but with some angst.
When the blade is not attached the slide bracket will move in the groove well and there does not appear to be anything causing the bracket to bind.
When the blade is on and I tension it with the tension lever the blade is taut by not taut enough.
I have looked and looked and still can not see why the slide bracket does not move up when the blade tension knob is turned. could it be because the thread is not running smoothly or is there something simple that I am missing.
I have attached a few pics that might assist
Regards
Grahamwhale oil beef hooked
-
18th April 2015 06:34 PM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Location
- Advertising world
- Age
- 2010
- Posts
- Many
-
5th July 2015, 12:23 AM #2SENIOR MEMBER
- Join Date
- Jun 2015
- Location
- Fort Saskatchewan, AB
- Posts
- 79
If the spring is compressing everything should be fine. As the spring continues to compress, there is a square nut which should become visible in the window. As the nut rides further up the window, greater tension is applied to the band. If you are running a 1/2" band, turn until the nut is at the 3/8" mark. Your manual should tell you if it is the top of the nut or bottom. The gauge is not really accurate, but provides a consistent reference point.
Don
Sent from my iPad using Tapatalk
-
6th July 2015, 09:46 AM #3
Hooke's law the spring compression is proportional to force (tension).
-
6th July 2015, 10:45 AM #4SENIOR MEMBER
- Join Date
- Jun 2015
- Location
- Fort Saskatchewan, AB
- Posts
- 79
-
6th July 2015, 01:46 PM #5SENIOR MEMBER
- Join Date
- Jun 2015
- Location
- Fort Saskatchewan, AB
- Posts
- 79
tension
I also can just see the edge of the square nut that travels up the threaded rod as you increase the tension. This nut has to be up around the mark for your size(width) of band.
The spring is made to compress, the band is not made to stretch. You will never get the blade absolutely taught without causing serious stress on the blade. Some band manufacturers say 15,000 psi is the right amount. Most of the commercial low tension silicon bands work well following the gauge on the saw, even a bit less.
Depending on the age and use or possible poor quality from the factory, your spring might be tired. There are many aftermarket sources for a replacement spring.
Don
-
6th July 2015, 03:57 PM #6
-
6th July 2015, 06:27 PM #7China
- Join Date
- Dec 2005
- Location
- South Australia
- Posts
- 4,475
I my have missed somthing here, have you tried lubrication
Similar Threads
-
Blade tension
By Lee roy in forum BANDSAWSReplies: 2Last Post: 25th October 2012, 05:11 AM -
blade tension
By Farm boy in forum SMALL TIMBER MILLINGReplies: 7Last Post: 22nd May 2009, 07:59 PM -
tension again
By pommyphil in forum BANDSAWSReplies: 7Last Post: 22nd April 2008, 06:12 PM -
Tension measurement?
By Fencepost2 in forum BANDSAWSReplies: 10Last Post: 15th April 2008, 02:16 PM -
Tension OFF?
By Greolt in forum BANDSAWSReplies: 47Last Post: 14th July 2005, 11:36 PM