As some of you here might already know, I do a good bit of re-saw work on my 20" Delta BS. It's an old one but the bearings and motor have been rebuilt a couple of times along a schedule I understand and find reasonable.
The trouble area for me are the tires for the old Delta BS wheels. Finding the old black rubber tires and gluing them down is work. Done it.
On this last change over, I decided to go with the urethane on the 20 inch after installing them on the 14" was so easy and they seemed to work well.
Well after a couple years, I notice a small rhythmic vibration that I have not felt or heard before.
I check the blade is centered, make sure the tires are clean, re check the cool blocks and bearing wheels for any misalignment.. nothing.
Still have the small vibration. Check the tires again and they don't seem terribly tight. Both top and bottom are NOT tight like the day I struggled to get them on. Note: I did not use heat of any kind to stretch the urethane tires while doing the install. Heard others had troubles down the road.
Now I am going to do a couple things I don't like to do but I just have to see the tires in motion. Yes I am going to take the wheel cover and open it while the bandsaw is running. I did this after checking very carefully that the tires were dead center and no drift.
These photos below are taken with the wheels in motion. Top wheel is driven and bottom wheel is the driver. I will refer to the point of my concern with reference to clock positions.
In photo 1 above, you can see a tire gap begin to open after it leaves the blade contact point at 3 oclock. It becomes very obvious at the 5 oclock position and just sags between 6-7 oclock. Notice is closes again at 9 position as the blade bears down on the tire. Wow not good.
In photo 2 you see a closer look at the gap shown in photo 1. The only reason the tire stays on is the small center groove in the wheel where the tire guide fits in. These tires are very expensive and they are design for the Delta wheel. The are NOT FLAT on the inside like the cheaper tires.
In photo 3 I am showing the bottom wheel. This is driven by the motor in a clockwards motion as you look at the photo. Notice the gap between the wheel and tire from 12 o'c till it reaches the blade at 3 o'c.
Looking at this I am faced with a couple questions. After 2 years should I expect more from a set of tires that cost 250 dollars? Does this seem like a material defect to others here or am I off track?
I am going to call the supplier who sold it to me and see what he thinks. This will be a journey.
The trouble area for me are the tires for the old Delta BS wheels. Finding the old black rubber tires and gluing them down is work. Done it.
On this last change over, I decided to go with the urethane on the 20 inch after installing them on the 14" was so easy and they seemed to work well.
Well after a couple years, I notice a small rhythmic vibration that I have not felt or heard before.
I check the blade is centered, make sure the tires are clean, re check the cool blocks and bearing wheels for any misalignment.. nothing.
Still have the small vibration. Check the tires again and they don't seem terribly tight. Both top and bottom are NOT tight like the day I struggled to get them on. Note: I did not use heat of any kind to stretch the urethane tires while doing the install. Heard others had troubles down the road.
Now I am going to do a couple things I don't like to do but I just have to see the tires in motion. Yes I am going to take the wheel cover and open it while the bandsaw is running. I did this after checking very carefully that the tires were dead center and no drift.
These photos below are taken with the wheels in motion. Top wheel is driven and bottom wheel is the driver. I will refer to the point of my concern with reference to clock positions.
In photo 1 above, you can see a tire gap begin to open after it leaves the blade contact point at 3 oclock. It becomes very obvious at the 5 oclock position and just sags between 6-7 oclock. Notice is closes again at 9 position as the blade bears down on the tire. Wow not good.
In photo 2 you see a closer look at the gap shown in photo 1. The only reason the tire stays on is the small center groove in the wheel where the tire guide fits in. These tires are very expensive and they are design for the Delta wheel. The are NOT FLAT on the inside like the cheaper tires.
In photo 3 I am showing the bottom wheel. This is driven by the motor in a clockwards motion as you look at the photo. Notice the gap between the wheel and tire from 12 o'c till it reaches the blade at 3 o'c.
Looking at this I am faced with a couple questions. After 2 years should I expect more from a set of tires that cost 250 dollars? Does this seem like a material defect to others here or am I off track?
I am going to call the supplier who sold it to me and see what he thinks. This will be a journey.