Shopsmith Forums

What is this? I purchased a used Shopsmith a while back and this was among the "extras."

It is a saw blade arbor for saw blades with a 5/8" arbor hole.

John is probably correct but since I cannot see the top of the Arbor without the nut I am not sure which one of the two shown below you have. The one on the left is P/N 555608 and is the 5/8" Saw Blade Arbor originally for the Sawsmith Table Saw but now for the Mark V 505, 510, 520 and Mark 7. It is the more commonly found Arbor of the two. The one on the right is P/N 555572 and is the 1-1/4" Saw Blade Arbor for the Sawsmith Table Saw.

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Thank you!
It is a 555608 - and when I saw the answers I smacked my forehead and said "I should have seen that" to myself...!
Thanks again!
Tom

chapmanruss wrote: Sun Apr 11, 2021 1:01 pm John is probably correct but since I cannot see the top of the Arbor without the nut I am not sure which one of the two shown below you have. The one on the left is P/N 555608 and is the 5/8" Saw Blade Arbor originally for the Sawsmith Table Saw but now for the Mark V 505, 510, 520 and Mark 7. It is the more commonly found Arbor of the two. The one on the right is P/N 555572 and is the 1-1/4" Saw Blade Arbor for the Sawsmith Table Saw.

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555608 - 555572.jpg

can you mount popular 5/8" arbor blade on #555572? or 1-1/4" arbor blade only?

jjj240 wrote: Sun Aug 04, 2024 10:49 pm

chapmanruss wrote: Sun Apr 11, 2021 1:01 pm John is probably correct but since I cannot see the top of the Arbor without the nut I am not sure which one of the two shown below you have. The one on the left is P/N 555608 and is the 5/8" Saw Blade Arbor originally for the Sawsmith Table Saw but now for the Mark V 505, 510, 520 and Mark 7. It is the more commonly found Arbor of the two. The one on the right is P/N 555572 and is the 1-1/4" Saw Blade Arbor for the Sawsmith Table Saw.

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555608 - 555572.jpg

can you mount popular 5/8" arbor blade on #555572? or 1-1/4" arbor blade only?

#555572 1-1/4" arbor blade only

jjj240,

As JPG already said the 555572 Arbor is for 1-1/4" arbor hole saw blades only. If you refer to the picture I posted of the 555608 and 555572 Arbors, you can see the 1-1/4" raised area around the threaded end. The picture below shows the common 1-1/4" Arbors for the Mark series tools. The longer one on the left is Arbor P/N 555130 for the Mark V 510/505, 520, Mark 7 and Mark 4. The Arbor 555572 can be used in place of that one. The one on the right is Arbor P/N 505511 for the Mark V 500 and the original Mark 5 Table System. 505511 can also be used for the Mark 2 and the original Mark VII (not the current Mark 7) made in the 1960's.

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A little history on the 505511. It dates back to the introduction of the Mark 5 in 1954 and at the time was part number 22 032. In 1964 all the parts numbers changed and that Arbor became 505511. In addition, around the time the part numbers changed Magna began putting the black protective coating on bare metal parts. The 505511 Arbor shown above is a later version having the beveled top while the earlier versions had a rounded top. The picture below, although incomplete, shows many of the Arbors made for the Shopsmith Tools going back to the beginning in 1947.

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