Landscape Rake wheels

[Old Machinist]

Will probably order the tine set. Have to do some measuring before I order but should work. Cheapest I have found so far.

Look at the design of the ignite rake. If your tines connect to the top surface those wheels will not connect as shown. You may be able to flip the mounts and still use them?

I had no problem with the durability of the Titan set. Just problems getting them to ship complete. I also didn't like how close they were to the rake tines and the Ignite set look to be the same in that regard.

I say learn to fabricate and build your own.

 

[Bearcatrp]

Haven’t done any measurements yet. Here is mine

 

[The Evil Twin]

I've had no problem with mine which are identical to the Ignite ones. There really isn't a lot of stress on the down tube during operation. The highest bending moment is up at the attachment to the rake cross bar.

This is what will break first.

 

[bobnic]

This is what will break first.
View attachment 151871

Do you have actual experience with a set of wheels of this design or are you just guessing? I have a set and have had no problems with them.

There is no significant bending moment applied at the point you indicated because the wheels turn, so no significant horizontal force is applied to the lower end of the wheel post. So unless you catch the wheel in a gopher hole while raking at a good speed, it is unlikely to break there.

 

[The Evil Twin]

Do you have actual experience with a set of wheels of this design or are you just guessing? I have a set and have had no problems with them.

There is no significant bending moment applied at the point you indicated because the wheels turn, so no significant horizontal force is applied to the lower end of the wheel post. So unless you catch the wheel in a gopher hole while raking at a good speed, it is unlikely to break there.

Not guessing. It's simple geometry, engineering and welding experience. Even resting on the ground, there is tensile force on that weld joint. It doesn't matter if the wheels swivel.
Besides, I didn't say they'll implode tomorrow. I said that is where the first point of failure will be.

 

[bobnic]

Not guessing. It's simple geometry, engineering and welding experience. Even resting on the ground, there is tensile force on that weld joint. It doesn't matter if the wheels swivel.
Besides, I didn't say they'll implode tomorrow. I said that is where the first point of failure will be.

Apply your engineering expertise and consider a free body diagram of the wheel assembly up to the fixed point where it attaches to the rake. It will be evident that the weld joining the vertical tube to the horizontal member is loaded primarily in shear, not tension due to the portion of the rake weight carried by the wheel. Only if the wheel is restrained horizontally during operation will a significant bending moment be applied to the welded joint in question, which would result in tensile stress at the location of your red arrow and possible failure if the wheel restraint under operation was high enough. Respectfully that is my opinion based on decades of mechanical engineering experience. You are certainly entitled to your own opinion so I'll leave it at that.

 

[The Evil Twin]

Apply your engineering expertise and consider a free body diagram of the wheel assembly up to the fixed point where it attaches to the rake. It will be evident that the weld joining the vertical tube to the horizontal member is loaded primarily in shear, not tension due to the portion of the rake weight carried by the wheel. Only if the wheel is restrained horizontally during operation will a significant bending moment be applied to the welded joint in question, which would result in tensile stress at the location of your red arrow and possible failure if the wheel restraint under operation was high enough. Respectfully that is my opinion based on decades of mechanical engineering experience. You are certainly entitled to your own opinion so I'll leave it at that.

If you are moving, there will be drag. That is the tensile force that will break the Chinese snot weld. I too am a mechanical engineer. And a formerly certified structural welder. There should be a gusset there. It is a weak point. However, I may be wrong. This may be the first failure point for the exact same reason.

 

[Bearcatrp]

Just ordered the tine set. Will let you know how it fits. Free shipping was nice.