Tool and Cutter Grinder Can’t Swivel Head

[David Pollard]

Hi Guys,
I bought a tool and cutter grinder recently and I’m just trying to figure out how everything works and what tooling / fixtures I need to go with it.
It has cleaned up great and most things slide and glide very nicely.

As best I can figure out it is a called a Chevalier End Mill Grinder Model FCG-610 made in Taiwan.
I'm trying to swivel the head on the horizontal axis. That is along the scale you can see in the second image.
It would appear that bolt you can see at the back of centre would be the lock bolt.
I can undo that and completely remove it.
It would appear that the bolt at the front is some kind of worm gear that should rotate the head along that axis.
The worm botl turns freely about 1/4 of a turn in total but the angle does not move at all. Not even a wiggle.
I'm assuming this movement is backlash in the worm.

I couldn't find a manual but I did find a sales brochure (attached).
It lists that front hex as "2. Vertical adjustment of wheel head (including wheel head fixing)"
Which sounds to me like it lost something in the translation
The vertical adjustment is the big hand wheel on top and the lock is the Lever on the left.

Is there anyone here that has used one of these and knows how it is supposed to work.
If it is simply stuck I'm open to ideas on how to unstick it.

Thanks in advance
David

 

[ddickey]

Loosen the lock bolt a turn or two and wack it with a soft hammer. That should loosen it up assuming it is designed the way I see it.

 

[Ulma Doctor]

G'Day David,
that's gotta be one of the coolest hobby size sharpeners ever !
i'm not sure if the idea will help, and i may be completely wrong.

loosen the rearward bolt, that may be a lock bolt
then see if that frees the bolt up front, which may be a wormgear to turn the head

 

[ddickey]

I bet it's a split cotter that needs a little mechanical agitation.

 

[Barncat]

Hopefully it isn't siezed up. I bought one that was, I took the column off, soaked it in a 5 gallon bucket of atf/acetone mix for a couple weeks, then reassembled and used a big arse pipe wrench with a 3 foot cheater pipe on it to break it free. After it was free, discovered it only had a rust spot about as big as a dime holding it together. Amazing how strong that rust was.

 

[David Pollard]

Loosen the lock bolt a turn or two and wack it with a soft hammer. That should loosen it up assuming it is designed the way I see it.

I haven't tried giving it a whack. That will be the next thing I try. Maybe I won't get back out to the shed until the weekend

 

[David Pollard]

Hopefully it isn't siezed up. I bought one that was, I took the column off, soaked it in a 5 gallon bucket of atf/acetone mix for a couple weeks, then reassembled and used a big arse pipe wrench with a 3 foot cheater pipe on it to break it free. After it was free, discovered it only had a rust spot about as big as a dime holding it together. Amazing how strong that rust was.

I can't see how the motor comes off mine.
Unless there is something hidden up inside the column hole. Hopefully it isn't going to be this drastic.
Good work freeing yours up!

 

[David Pollard]

G'Day David,
that's gotta be one of the coolest hobby size sharpeners ever !
i'm not sure if the idea will help, and i may be completely wrong.

loosen the rearward bolt, that may be a lock bolt
then see if that frees the bolt up front, which may be a worm gear to turn the head

I just bought the mag chuck to go with it. It's not really meant for it but I reckon it will work as a mini surface grinder.
It came with two centres and a round nose end mill sharpener that can index a fixed number of positions.
I think it's still going to need some kind of free spinning air spindle but those things are ridiculously expensive.

I'll try the soft hammer wack on the rear bold. The bolt comes completely out but there may be some kind of cone shaped thing holding it tight.

 

[David Pollard]

I loosened that rearward bolt about a turn and gave it a tap with a soft hammer.
The bolt easily dropped back down its flange. So I loosened it another turn and another tap and it dropped to the flange again.
Still no wiggle at all on the head and the same 1/4 of a turn on the suspected worm bolt.
So it is still locked up tight.
I'm not afraid to pull the head apart but from the outside I can't see how it comes apart.
Maybe if I take the cover off the back of the motor I'll be able to see something but I doubt it.
There are two little grub screws next to the worm bolt not sure what they are for.
The only other thing I can think of is to dismantle the vertical hand wheel and take the head off the top of the column.
I may be able to see how the horizontal spindle is held together from inside the column hole.
Open to other ideas.

David

 

[JimDawson]

What is down that hole that's on the centerline of the pivot? Any kind of a alignment pin or something?