[4]

Lathe back gears

[3]
[10] Like what you see?
Click here to donate to this forum and upgrade your account!

Camnefdt

Registered
Registered
Joined
Jun 21, 2018
Messages
41
Likes
14
#1
Hi all

So I've done some reading inside the south bend lathe operating book and it talks about the back gears on the head stock being used to get slower operating speeds.

Can somebody perhaps elaborate a little more on how this system is meant to operate?

I will attach a pic of my head stock off the colchester I just got but when back gears are engaged, the head stock is completely locked up.

Are both gears on each side of the pulleys meant to be hard fastened to the shaft? I do plan on stripping the whole system over the weekend to clean up and check up on the condition of bearings etc but just an idea of how its suppose to work would help
 

Attachments

Camnefdt

Registered
Registered
Joined
Jun 21, 2018
Messages
41
Likes
14
#2
Never mind, found it already hahaha just shows that looking for 1 more second (literally) can make all the difference
 

Camnefdt

Registered
Registered
Joined
Jun 21, 2018
Messages
41
Likes
14
#3
Its got a little 'switch' to disconnect it from the pulleys
 

markba633csi

H-M Supporter - Gold Member
H-M Supporter - Gold Member ($25)
Joined
Apr 30, 2015
Messages
2,760
Likes
1,430
#4
Yes the all-important pin :D
How are your gears? They look pretty good from what I can see
 

dlane

Active User
H-M Supporter - Gold Member ($25)
Joined
Sep 27, 2014
Messages
2,927
Likes
1,373
#6
South Bend have a pin that pulls out to disengage the bull gear from the pullys.
Have pics of your lathe ? We like pics
 

Camnefdt

Registered
Registered
Joined
Jun 21, 2018
Messages
41
Likes
14
#7
Yes the all-important pin :D
How are your gears? They look pretty good from what I can see
There's 1 or 2 with tiny chip on a tooth or so but all in all they seem good condition.

Everything is covered in some kind of horrible lubricating 'stuff' which i can only think of as being like a copper compound spray that was sprayed all over everything
 

Camnefdt

Registered
Registered
Joined
Jun 21, 2018
Messages
41
Likes
14
#8
South Bend have a pin that pulls out to disengage the bull gear from the pullys.
Have pics of your lathe ? We like pics
This is the full lathe, colchester britannia which, as best I can track, was made between 1920 and 1930.
 

Attachments

markba633csi

H-M Supporter - Gold Member
H-M Supporter - Gold Member ($25)
Joined
Apr 30, 2015
Messages
2,760
Likes
1,430
#9
Must be a rare one, no information on that model I can find, only Triumph and Master models of that era
 

Smithdoor

Active User
Registered
Joined
Dec 23, 2012
Messages
433
Likes
78
#10
South Bend have a pin that pulls out to disengage the bull gear from the pullys.
Have pics of your lathe ? We like pics
This is the full lathe, colchester britannia which, as best I can track, was made between 1920 and 1930.
Looks great
Look big for a pin , sliding knob or some other in Gage the large gear.

Typical from time of building it was simple and basic

Dave

Sent from my SAMSUNG-SM-J320A using Tapatalk
 

Smithdoor

Active User
Registered
Joined
Dec 23, 2012
Messages
433
Likes
78
#11
Using back gears and the blet gave good power at speed and then blet give good finish on last pass

Dave

Sent from my SAMSUNG-SM-J320A using Tapatalk
 

Camnefdt

Registered
Registered
Joined
Jun 21, 2018
Messages
41
Likes
14
#12
Looks great
Look big for a pin , sliding knob or some other in Gage the large gear.

Typical from time of building it was simple and basic

Dave

Sent from my SAMSUNG-SM-J320A using Tapatalk
1530072518256725924323.jpg the back gears themselves are on an offset bushing with a dial that you pull out, then turn and has a detent to clip into position, but to disengage the gear from the pulleys, it has a little switch type thing on the side of the biggest pulley.
 

Smithdoor

Active User
Registered
Joined
Dec 23, 2012
Messages
433
Likes
78
#13
The big gear on the spindle
Looks great
Look big for a pin , sliding knob or some other in Gage the large gear.

Typical from time of building it was simple and basic

Dave

Sent from my SAMSUNG-SM-J320A using Tapatalk
View attachment 270634 the back gears themselves are on an offset bushing with a dial that you pull out, then turn and has a detent to clip into position, but to disengage the gear from the pulleys, it has a little switch type thing on the side of the biggest pulley.
Sent from my SAMSUNG-SM-J320A using Tapatalk
 

Camnefdt

Registered
Registered
Joined
Jun 21, 2018
Messages
41
Likes
14
#14
The big gear on the spindle

Sent from my SAMSUNG-SM-J320A using Tapatalk
Yea found it on the inside of the big gear 20180626_211227.jpg
Works like a switch to engage or disengage it
 
[6]
[5] [7]
Top