How Often Do You Check The Lower Thrust Bearing On You Band Saw - Router Forums
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 32 (permalink) Old 11-21-2014, 01:28 PM Thread Starter
Registered User
 
Join Date: Jun 2011
Country: United States
First Name: Jerry
Posts: 2,645
 
Default How Often Do You Check The Lower Thrust Bearing On You Band Saw

I was installing a new blade on my band saw this morning and discovered that the lower thrust bearing had gone gunny sack. The last time I installed a blade which was a couple of months ago the bearing was turning freely. It had quit turning and had a groove in it. It had gotten so hot that the grease had completely run out.

Fortunately my neighbor had a replacement. I order three new ones from Grizzly just now. I will be watching for this regularly in the future.

Maybe I'm the only one, but I doubt it, that is guilty of letting this situation happen with my saw. I'm wondering if others have had this experience or not. Also, do other people regularly check the bearing other than when changing blades?

Jerry B.
Jerry Bowen is offline  
Sponsored Links
Advertisement
 
post #2 of 32 (permalink) Old 11-21-2014, 02:12 PM
pal
Registered User
 
pal's Avatar
 
Join Date: Feb 2008
Country: Australia
First Name: Harold
Posts: 414
 
Default

Jerry, I check the bearings every time before I switch the bandsaw on now as I have been caught a couple of times with knackered bearings.

Harold

Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning.

Albert Einstein
pal is offline  
post #3 of 32 (permalink) Old 11-21-2014, 06:43 PM
Registered User
 
Join Date: Jun 2011
Country: United States
First Name: Duane
Posts: 1,709
 
Default

Used to every time I changed blades... then I replaced it with a ceramic one.

Now... never!

I have found that hand tools are the best choice when I want to make mistakes at a slower rate of speed.

I don't suffer from insanity. I enjoy every minute of it.
Dmeadows is offline  
Sponsored Links
Advertisement
 
post #4 of 32 (permalink) Old 11-22-2014, 10:53 AM
Registered User
 
Garyk's Avatar
 
Join Date: Dec 2011
Country: United States
First Name: Gary
Posts: 813
 
Default

I have a habit of checking over EVERY power tool before I turn it on. I don't like surprises. That doesn't mean an "in depth" inspection of every part but those things that are easy to visually check. Several times each year I go "down in the bowels" and check all of the parts & pieces. It takes time but could save you money or avoid a bad accident some where along the way.
Garyk is offline  
post #5 of 32 (permalink) Old 11-22-2014, 12:59 PM
Registered User
 
PhilBa's Avatar
 
Join Date: Sep 2014
Country: United States
First Name: phil
Posts: 1,533
 
Default

On my bandsaw, I check and adjust guides and thrust every time I change blades which is pretty frequent. I do a cursory check, including a quick tension check, every time I use it, though.
PhilBa is offline  
post #6 of 32 (permalink) Old 11-22-2014, 01:01 PM
Registered User
 
neville9999's Avatar
 
Join Date: Jan 2012
Country: Australia
First Name: Neville
Posts: 1,882
 
Send a message via Yahoo to neville9999
Default

Quote:
Originally Posted by PhilBa View Post
On my bandsaw, I check and adjust guides and thrust every time I change blades which is pretty frequent. I do a cursory check, including a quick tension check, every time I use it, though.
Good advice Phil, N
neville9999 is offline  
post #7 of 32 (permalink) Old 11-22-2014, 01:58 PM
Forum Contributor
 
Herb Stoops's Avatar
 
Join Date: Oct 2014
Country: United States
First Name: Herb
Posts: 8,924
 
Default

I have to laugh, when I changed my blade a couple of days ago, I found the same thing. I always keep an extra bearing on hand, have to order a new one now. I do a lot of resawing and they don't last long. Why don't they???
In my opinion they are using the bearing wrong or the wrong bearing. If the bearing was turned 90 degrees so it spun like a bearing is supposed to spin ,they would probably last forever. Here you have a blade pulling down on the side edge of the bearing on top turning the bearing that rubs on the bottom of the bearing causing friction heat and eventually freezing up the bearing and filing a groove from top to bottom. This bearing does not guide the blade only keeps it from being pushed back ,the guides are on the side.
Thats my opinion and I am sticking with it.

Herb

Last edited by Herb Stoops; 11-22-2014 at 02:00 PM.
Herb Stoops is online now  
post #8 of 32 (permalink) Old 11-22-2014, 03:23 PM Thread Starter
Registered User
 
Join Date: Jun 2011
Country: United States
First Name: Jerry
Posts: 2,645
 
Default

Quote:
Originally Posted by Herb Stoops View Post
I have to laugh, when I changed my blade a couple of days ago, I found the same thing. I always keep an extra bearing on hand, have to order a new one now. I do a lot of resawing and they don't last long. Why don't they???
In my opinion they are using the bearing wrong or the wrong bearing. If the bearing was turned 90 degrees so it spun like a bearing is supposed to spin ,they would probably last forever. Here you have a blade pulling down on the side edge of the bearing on top turning the bearing that rubs on the bottom of the bearing causing friction heat and eventually freezing up the bearing and filing a groove from top to bottom. This bearing does not guide the blade only keeps it from being pushed back ,the guides are on the side.
Thats my opinion and I am sticking with it.

Herb
Herb,
I'm not quite following you for sure. My saw, and I suspect that it is typical, is such that the bottom bearing, the one that just went bad on me is positioned parallel with the blade, and it's axle at 90 degrees to the edge of the blade. Hard to describe this, isn't it. The top thrust bearing is the one that is position at a 90 degree angle to the blade. The bearing on top is not as prone to get debri in it. The lower one is the one that is prone to getting the debri in it. The guy that helped me when I ordered replacements from Grizzly said that the lower bearing always seem to go first due to the debri.

As I said, I had always checked the bearing when changing blades but don't change them as often as some do. I, in my ignorance about such things did not have a spare on hand, but will in the future and will be checking all of the bearings on a regular and constant basis now after what I learned.



Jerry B.
Jerry Bowen is offline  
post #9 of 32 (permalink) Old 11-24-2014, 05:20 PM
Forum Contributor
 
Herb Stoops's Avatar
 
Join Date: Oct 2014
Country: United States
First Name: Herb
Posts: 8,924
 
Default

Hi Jerry,
Hmmmmm My cousins new last year 14" grizzly is the same as my Ridgid and the same as my Prior Craftsman 14" and 9" Delta ,just the opposite of yours.

Herb
Attached Thumbnails
Click image for larger version

Name:	IMG_1511 (800x600).jpg
Views:	82
Size:	263.3 KB
ID:	75606  

Click image for larger version

Name:	IMG_1512 (800x600).jpg
Views:	92
Size:	188.5 KB
ID:	75607  

Click image for larger version

Name:	IMG_1513 (800x600).jpg
Views:	115
Size:	193.0 KB
ID:	75608  

Click image for larger version

Name:	IMG_1514 (800x600).jpg
Views:	90
Size:	216.6 KB
ID:	75609  

Click image for larger version

Name:	IMG_1515 (800x600).jpg
Views:	90
Size:	204.2 KB
ID:	75610  

Herb Stoops is online now  
post #10 of 32 (permalink) Old 11-24-2014, 07:53 PM
Registered User
 
lenh's Avatar
 
Join Date: Feb 2009
Country: United States
First Name: Len
Posts: 119
 
Default

Quote:
Originally Posted by Herb Stoops View Post
Hi Jerry,
Hmmmmm My cousins new last year 14" grizzly is the same as my Ridgid and the same as my Prior Craftsman 14" and 9" Delta ,just the opposite of yours.

Herb
Herb, without the pictures I would not have believed it. Why the thrust bearing would be "sidways" is beyond me. I know that on my Powermatic both bearings are the way they should be. After 10 years of pretty hard use, nary a problem. I don't find them to be full of the crud that your pictures show. (I use dust collection) Same is true of my little 10" Crapsman band saw - both bearings run in line with the blade.

Len
lenh is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Router Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Problem With Removing and Replacing Table On My Band Saw Jerry Bowen Tools and Woodworking 22 08-25-2013 06:18 AM
Profile Cutting Cutters and their Bearings neville9999 Jigs and Fixtures 7 12-10-2012 01:11 PM
The use of a Router table as a Profile Copier neville9999 Jigs and Fixtures 4 12-06-2012 11:44 AM
PC lower router bearing sources, please XK140M New Member Introductions 8 09-24-2012 01:11 PM
top bearing kits? biloxi tom Router Bits - Types and Usage 3 09-12-2012 07:38 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome