Logan 820 direct drive?

Rich,
That's reassuring. Did I get the explanation of how it works correctly?

Tim

Truthfully I don't remember which way the "switch" works but it should be easy to tell if the bull gear is engaged to the pulley which is what you want for direct drive. So my guess is yes you got it right. If I get a chance later today I will go out to my freezing shop and see which way mine works.
 
You could always work in my overheated apartment!
 
So on mine with the bull gear rotated so the "switch" is at the top, rotating the switch so the lever points toward the front of the lathe engages the bull gear for direct drive. Rotating the lever so it points toward the back of the lathe disengages the bull gear for use when in back gear.
 
Logan used two different style pins over the years. The earlier design (like Tim shows in the first picture) is part number LA-676 and was used on serial numbers 37063 and below. It is called "handle" in the parts manual. The mechanism is a bit more complicated. The newer simple style that Nogoingback shows was used on later models. It is part number LA-345 and is called "bull gear plunger".


Clueless, are you sure about than serial number? My lathe is s/n 22910 and it has LA-345. Both of the Headstock diagrams I have also
show that part as well. It seems like that change was pretty early.

Tim, what serial number is your lathe?
 
Clueless, are you sure about than serial number?

I can only tell you what I see in the manuals.

This is what I see in the 800 series manual:

It shows the following:
  • "LA-27-1" Headstock with the "LA-676" style with note "To S/N 32777"
  • "LA-28" Bull Gear Assembly also withe the "LA-676" style with note "To S/N 37063"
  • "LA-27-2" Headstock with the "LA-676" style with note "From S/N 32777 To 37063"
  • "LA-27-3" Headstock with the "LA-345" style with note "From S/N 3703 To 62129"
  • "LA-27-4 Headstock with the "LA-345" style with note "From 62129"

The manual for the 200 series shows two headstocks, "LA-108-1" "To SER# 48577" and "LA-108-2" "From SER# 48577" both show the "LA-345" style.

Now you know what I know! :)

FYI my S/N is 32071 made 8/20/45
 
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Clueless, are you sure about than serial number? My lathe is s/n 22910

Tim, what serial number is your lathe?

Must have been a month or two before yours, 22473.

Tim

Sent from my SM-G965U using Tapatalk
 
I can only tell you what I see in the manuals.

This is what I see in the 800 series manual:

It shows the following:
  • "LA-27-1" Headstock with the "LA-676" style with note "To S/N 32777"
  • "LA-28" Bull Gear Assembly also withe the "LA-676" style with note "To S/N 37063"
  • "LA-27-2" Headstock with the "LA-676" style with note "From S/N 32777 To 37063"
  • "LA-27-3" Headstock with the "LA-345" style with note "From S/N 3703 To 62129"
  • "LA-27-4 Headstock with the "LA-345" style with note "From 62129"

The manual for the 200 series shows two headstocks, "LA-108-1" "To SER# 48577" and "LA-108-2" "From SER# 48577" both show the "LA-345" style.

Now you know what I know! :)

FYI my S/N is 32071 made 8/20/45


OK, I get it now. I guess I assumed that they would use the same parts for the 820 and the 200 since they were built at the
same time. Mine's a 200, so I was going off the diagrams for them.
 
So it would appear that the early Logan Series 800 Lathes had a radial pin that locked the cone pulley to the bull gear, and the later ones had an axial pin. I will add one thing that no one seems to have mentioned yet. Disengaging the direct drive pin (both types) required only rotating the spindle so that the lever that rotated the eccentric in the early types or the direct drive pin itself in the late type was accessible. But with either type, in order to re-engage either pin, you not only had to rotate the spindle so that the lever or pin was near 12:00 o'clock but you also had to rotate the cone pulley so that the hole in the pulley that the pin was to fit into was aligned with the pin. The early type was probably easier as you could see the hole in the pulley. One of the first things that I did on my Atlas (which has the axial pin) when I bought it in 1981 was to take a center-punch and mark the pulley over the hidden hole (actually on it, holes, as it has two).

Also, I noticed in the only Logan 800 Series manual that I've seen that in the Operator's section, it only mentions the axial pin. Which would be confusing to anyone who owned an earlier version.
 
Really interesting. I'll check mine for that this weekend.
 
So it would appear that the early Logan Series 800 Lathes had a radial pin that locked the cone pulley to the bull gear, and the later ones had an axial pin. I will add one thing that no one seems to have mentioned yet. Disengaging the direct drive pin (both types) required only rotating the spindle so that the lever that rotated the eccentric in the early types or the direct drive pin itself in the late type was accessible. But with either type, in order to re-engage either pin, you not only had to rotate the spindle so that the lever or pin was near 12:00 o'clock but you also had to rotate the cone pulley so that the hole in the pulley that the pin was to fit into was aligned with the pin. The early type was probably easier as you could see the hole in the pulley. One of the first things that I did on my Atlas (which has the axial pin) when I bought it in 1981 was to take a center-punch and mark the pulley over the hidden hole (actually on it, holes, as it has two).

Also, I noticed in the only Logan 800 Series manual that I've seen that in the Operator's section, it only mentions the axial pin. Which would be confusing to anyone who owned an earlier version.


On mine, the hole in the bull gear is lined with the oil hole in the center pulley, so easy to see. No center punch required. But, it's a good
idea.
 
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