Newblue
Gold Member
Maybe it's only on newer compacts that have no hole. The 7610 is a mid size ag tractor isn't it?
PTO Connectors
- Thread starter dooleysm
- Start date
- Views: 8764
I'm most familiar with JD tractors but I haven't seen a PTO shaft with the hole for many years. Don't recall seeing attachments with the pin thru the coupler recently either.
Years ago I tried tapping the hole, first one side, then both sides. It was on a rotary mower. Would run for a few minutes then work loose. Scare the snot out of ya (not to mention dangerous) when that shaft comes off and starts flopping around.
I recommend you replace the end. Easy to do and relatively inexpensive. That is what I did and problem was solved.
dsb
Years ago I tried tapping the hole, first one side, then both sides. It was on a rotary mower. Would run for a few minutes then work loose. Scare the snot out of ya (not to mention dangerous) when that shaft comes off and starts flopping around.
I recommend you replace the end. Easy to do and relatively inexpensive. That is what I did and problem was solved.
dsb
Soundguy
Old Timer
- Joined
- Mar 11, 2002
- Messages
- 51,575
- Location
- Central florida
- Tractor
- RK 55HC,ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC
</font><font color="blue" class="small">( The 7610 is a mid size ag tractor isn't it? )</font>
Yep.. mid 90's hp..
Soundguy
Yep.. mid 90's hp..
Soundguy
PILOON
Super Star Member
Easier and safer would be to drill your adaptor completely through at about 1/2" from rear offset to simulate the location of the 'quick connect push pin' and simply install a 5/16 graded bolt.
If you have a regular adaptor simply clone the hole location and add a bolt with a safety pin clip thing.
That will never shake loose!
If you have a regular adaptor simply clone the hole location and add a bolt with a safety pin clip thing.
That will never shake loose!
Soundguy
Old Timer
- Joined
- Mar 11, 2002
- Messages
- 51,575
- Location
- Central florida
- Tractor
- RK 55HC,ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC
Gonna have to be good with a drill to drill offset like that...
Either way.. set screw or pin.. should work fine.
I have a 3pt cone spreader that has a flex shaft.. and it couples with a set screw.. has never ever backed out onme..
Soundguy
Either way.. set screw or pin.. should work fine.
I have a 3pt cone spreader that has a flex shaft.. and it couples with a set screw.. has never ever backed out onme..
Soundguy
PILOON
Super Star Member
</font><font color="blue" class="small">( Gonna have to be good with a drill to drill offset like that...
Either way.. set screw or pin.. should work fine.
I have a 3pt cone spreader that has a flex shaft.. and it couples with a set screw.. has never ever backed out onme..
Soundguy )</font>
Should work with a drill press and vice--also center punch to start and smaller pilot hole...
I would guess that the set screw would be fine with implements that are used in a fixed position such as spreaders and PTO generators....
However items like snowblowers, tillers and the like that are raised/lowered a lot as well as use lots of torque would probably be a totally different story.
Also the working angle of the shaft would come into play.
A tiller and bush hog would always slope downwards encouraging slide off while a spreader or broadcaster would be working sloped upwards.
In my opinion I would use a short bolt and a lock nut (or jamnut) over a simple set screw if I had that type of adaptor.
Either way.. set screw or pin.. should work fine.
I have a 3pt cone spreader that has a flex shaft.. and it couples with a set screw.. has never ever backed out onme..
Soundguy )</font>
Should work with a drill press and vice--also center punch to start and smaller pilot hole...
I would guess that the set screw would be fine with implements that are used in a fixed position such as spreaders and PTO generators....
However items like snowblowers, tillers and the like that are raised/lowered a lot as well as use lots of torque would probably be a totally different story.
Also the working angle of the shaft would come into play.
A tiller and bush hog would always slope downwards encouraging slide off while a spreader or broadcaster would be working sloped upwards.
In my opinion I would use a short bolt and a lock nut (or jamnut) over a simple set screw if I had that type of adaptor.
Soundguy
Old Timer
- Joined
- Mar 11, 2002
- Messages
- 51,575
- Location
- Central florida
- Tractor
- RK 55HC,ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC
</font><font color="blue" class="small">( over a simple set screw )</font>
I'm not knocking your idea of a bolt.. but.. I think you have 'too' low of an opinion vs set screws... do keep in mind that set screws hold very important things like tranny shifter forks .. etc... Those aren't things yoy want to come loose.. ( and you rarely do see these loose.. ).
If I went the set screw route.. i'd use taper threads, and I may even dimple the pto shaft with a second or two of drill bit contact thru the hole using it as a pilot.. etc.. this would make a great detent for a pointy headed set screw.
If you use an offset bolt , starting the hole on the curved exterior will be the issue.. and end mill might work.. or a second with a die grinder to flatten the spot, and then a center punch... etc.
use a hard bolt... like gr8 to go along witht hat hardened adapter... wouldn't want a soft bolt inthere and have it deform slightly and then not come out.. thus locking it to the pto shaft till it is drilled out or punched out.. etc..
A hose clamp slid over the set screw area and then tightened down would prevent the set screw from backing out.. and that woul preclude any drilling.. just use the hole already there, and tap for the set screw.. ( guess you could just drop a ball bearing in there too! )... all kind of ways to secure it...
Soundguy
I'm not knocking your idea of a bolt.. but.. I think you have 'too' low of an opinion vs set screws... do keep in mind that set screws hold very important things like tranny shifter forks .. etc... Those aren't things yoy want to come loose.. ( and you rarely do see these loose.. ).
If I went the set screw route.. i'd use taper threads, and I may even dimple the pto shaft with a second or two of drill bit contact thru the hole using it as a pilot.. etc.. this would make a great detent for a pointy headed set screw.
If you use an offset bolt , starting the hole on the curved exterior will be the issue.. and end mill might work.. or a second with a die grinder to flatten the spot, and then a center punch... etc.
use a hard bolt... like gr8 to go along witht hat hardened adapter... wouldn't want a soft bolt inthere and have it deform slightly and then not come out.. thus locking it to the pto shaft till it is drilled out or punched out.. etc..
A hose clamp slid over the set screw area and then tightened down would prevent the set screw from backing out.. and that woul preclude any drilling.. just use the hole already there, and tap for the set screw.. ( guess you could just drop a ball bearing in there too! )... all kind of ways to secure it...
Soundguy
PILOON
Super Star Member
Tend to agree now that I think of how hard it is to get some set screws out of a veebelt pulley.
Many a time I have bent an allen key beyond usefull.
I think that my main objection is that set screws should probably not be considered as a 'frequant use' device as in PTO fixation due to thread wear and basic hassle of allen keys.
The spring pin is just sooo much nicer to use.
Many a time I have bent an allen key beyond usefull.
I think that my main objection is that set screws should probably not be considered as a 'frequant use' device as in PTO fixation due to thread wear and basic hassle of allen keys.
The spring pin is just sooo much nicer to use.
firemanpat2910
Platinum Member
on the subject of set screws, They make set screws with a
brass tip on them so if you are locking down on a shaft you
dont burr it up. And the dimple in the shaft is another good way to go. I have seen some printing presses that have 2 set screws one on top of the other to lock it in. They also make set screws with spring loaded ball bearing already in it. Also
you could use a long set screw with a jam nut, depending on clearance issues.
brass tip on them so if you are locking down on a shaft you
dont burr it up. And the dimple in the shaft is another good way to go. I have seen some printing presses that have 2 set screws one on top of the other to lock it in. They also make set screws with spring loaded ball bearing already in it. Also
you could use a long set screw with a jam nut, depending on clearance issues.
