Shopsmith Forums

dusty wrote:How can you expect "the chart" to tell you what RPM to operate at. The author of that chart (or any other chart for that matter) has absolutely no knowledge of the performance characteristics of something that you are going to mount on that arbor.

The most the chart can do, without calling out specific hardware, is provide the user with a "guide" to approximate operating speeds.

The 2400 that I listed was from an earlier era chart when a 'Magna 8" Dado' was sold. It has small teeth, so that may explain the slower speed.

Paul: Am I to understand the new/free(with $75 order soon enough)/4 page laminated chart makes NO reference to dado blades. Reminds me if my 510 manual. Guess Dusty is correct(we should be 'routing'!:D). What I do not understand, is how do you fine tune the router for width of cut(in a single pass)?

JPG40504 wrote: Paul: Am I to understand the new/free(with $75 order soon enough)/4 page laminated chart makes NO reference to dado blades. Reminds me if my 510 manual. Guess Dusty is correct(we should be 'routing'!:D). What I do not understand, is how do you fine tune the router for width of cut(in a single pass)?

I have not yet received the paper chart, I was talking about the one built into the PowerPro.

As for using a router, either you do multiple passes or you purchase a bit of the correct size.

paulmcohen wrote:I have not yet received the paper chart, I was talking about the one built into the PowerPro.

As for using a router, either you do multiple passes or you purchase a bit of the correct size.

My point exactly. Routers ok for specific widths only. Dado blades are 'adjustable'.

I just heard from Infinity customer service and they recommend speeds up to 7,000 RPM for the 8" Dadonator blade. But would not recommend a specifc speed for a specifc operation.

Given that information I think I will leave my speed set to 3,450-3,600 initially. I do have to cut a lot of dados so I may experiment with faster speeds at some point.

I'm sort of confused but doesn't the manufacturer of the dado set / blade specify operating speed range?

For a dado blade and type (stacker, wobbler or other), I would rely on the manufacturer of the blade to specify rated RPM. I would only rely on SS for the speed setting to meet the blade maker specs.

Also, the nice thing with a SS is the ability to vary that speed depending on the material / stock. There's a big difference in making dado's in walnut vs. poplar. Conventional table saws have a fixed speed so its a harder judgement to avoid burn from incorrect feed rate. The SS variable speed solves that. And for those of us on the cheap to make a dado can use a thick kerf saw blade and reset the quill for repeat cuts to specified width.

Has anyone recieved the "new and improved" paper chart yet? My last order listed it as backordered. I will check the power-pro internal chart to see what it says tomorrow.

paulmcohen wrote:I just heard from Infinity customer service and they recommend speeds up to 7,000 RPM for the 8" Dadonator blade. But would not recommend a specifc speed for a specifc operation.

Given that information I think I will leave my speed set to 3,450-3,600 initially. I do have to cut a lot of dados so I may experiment with faster speeds at some point.

Wow! That seem pretty fast - most saw blades with brazed on teeth are rated not to exceed 5500 RPM.

I did read that themax RPM is 7,000 but that does not mean you need to run at that speed. If a standard table saw runs at 3600 for all blades then you would not have an option to run faster then that and you would expect the blade to be designed to do well at about 3600 rpm. Shopsmith would be an exception having a top end capable of reaching 7000 rpm with the new powerpro.

All that speed seems excessive.

Ed

brad_nalor wrote:I'm sort of confused but doesn't the manufacturer of the dado set / blade specify operating speed range?

Infinity makes the Dadonator. If obviously works at 3450 because that is what most tablesaws run at. They also spec the max speed at 7,000 for those that have variable speed saws.

What they don't provide is an other guidelines, is faster better?

2bits wrote:Has anyone recieved the "new and improved" paper chart yet? My last order listed it as backordered. I will check the power-pro internal chart to see what it says tomorrow.

The PowerPro internal chart is only for 6" dado blades, that is what started this thread.