USB Height Above Shaft Centerline - T8 vs T4

[RickKrung]

I'm working on setting up my 8" slow speed Rikon bench grinder for sharpening drill bits using the DBS-22 drill bit jig.  I am curious if there is a height difference of the USB bar, relative to the machine shaft centerline when set up on the two sizes of Tormek machines, T8 and T4.  This could be a question pertaining to other jigs as well, for example, if Tormek designed them to be the same. 

I measured my T8, with the USB set up in the horizontal (front) slots and distanced from a true 250mm grinding wheel using the Tormek lip clearance angle template, per the instructions.  Distance between the USB centerline and the machine shaft centerline was about 4cm.  Measured it by measuring from the bench top surface to each centerline and subtracted (24.3cm - 20.3cm = 4cm).

If someone with a T4 and the DBS-22 could set up the USB for the DBS-22 and measure the these heights, I would really appreciate it. 

Part of why I ask is that I'm using an FVB in a BGM-100 setup in the horizontal position and a standard USB vertical in the FVB, so I have no reference this height so the drill point addresses the wheel in an orientation similar to on the Tormeks.  Instructions for setting up the BGM-100 do not address the sort of setup I'm working with, putting the USB well below the centerline of the grinder. 

Rick

[cbwx34]

I'm working on setting up my 8" slow speed Rikon bench grinder for sharpening drill bits using the DBS-22 drill bit jig.  I am curious if there is a height difference of the USB bar, relative to the machine shaft centerline when set up on the two sizes of Tormek machines, T8 and T4.  This could be a question pertaining to other jigs as well, for example, if Tormek designed them to be the same. 

I measured my T8, with the USB set up in the horizontal (front) slots and distanced from a true 250mm grinding wheel using the Tormek lip clearance angle template, per the instructions.  Distance between the USB centerline and the machine shaft centerline was about 4cm.  Measured it by measuring from the bench top surface to each centerline and subtracted (24.3cm - 20.3cm = 4cm).

If someone with a T4 and the DBS-22 could set up the USB for the DBS-22 and measure the these heights, I would really appreciate it. 

Part of why I ask is that I'm using an FVB in a BGM-100 setup in the horizontal position and a standard USB vertical in the FVB, so I have no reference this height so the drill point addresses the wheel in an orientation similar to on the Tormeks.  Instructions for setting up the BGM-100 do not address the sort of setup I'm working with, putting the USB well below the centerline of the grinder. 

Rick

I guess I'm not sure what you want... 'cause it sounds like all you want is the distance between the center of the USB in the horizontal position, to the center of the driveshaft... Constant HH in jvh's diagram...

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... which on the T-4 I measure as 29mm.  But I don't need a DBS-22 to measure that, so I don't know if that is what you want?  (If not, maybe show in a pic or diagram.)

[RickKrung]

That is precisely what I am interested in.  Thank you. 

Found my copy of TormekCalc and diagrams as well as the "Settings" sheet that lists those values.  T8 is 41mm, T4 is 29mm. 

Rick