Arken EP-5 Problem

[jpjulian]

It has happened before but today it happened again, and again. The elevation turret cap keeps coming loose. The three set screws that hold the cap in place keep coming loose and the cap just spins around the turret. I think the cheap Chinese set screws are the issue. Anyone else have this happen with their Arkens? Did you replace them and if so what was your source? Thread pitch, presumably metric?
TIA
Joe

 

[Ledd Slinger]

Black fingernail polish or Blue Loc-tite

 

[Turkeytider]

It has happened before but today it happened again, and again. The elevation turret cap keeps coming loose. The three set screws that hold the cap in place keep coming loose and the cap just spins around the turret. I think the cheap Chinese set screws are the issue. Anyone else have this happen with their Arkens? Did you replace them and if so what was your source? Thread pitch, presumably metric?
TIA
Joe

Yes, it is a well known issue with Arken scopes. A drop of low strength Vibratite or Loctite solves the problem. Easy peasy.

 

[Precisionhunter417]

Ive had it happen to mine. Anyone have a source for replacement set screws that size?

 

[Coyotefurharvester]

Finger nail polish on top of the set screw, easier to remove.

 

[big5ifty]

It has happened before but today it happened again, and again. The elevation turret cap keeps coming loose. The three set screws that hold the cap in place keep coming loose and the cap just spins around the turret.

Loctite. Purple is one weaker than blue, for small screws. After application, still holding up on a 375 RUM.

The new set screws from Arken have an o-ring on them. I didn't bother with that, the Loctite is working.

Even after re-adjustment of the set screws to reset zero, they didn't loosen under recoil again.

 

[jpjulian]

Loctite. Purple is one weaker than blue, for small screws. After application, still holding up on a 375 RUM.

The new set screws from Arken have an o-ring on them. I didn't bother with that, the Loctite is working.

Even after re-adjustment of the set screws to reset zero, they didn't loosen under recoil again.

Man, I don't know about Loctite for that application.

 

[jpjulian]

I am pretty sure I'd prefer to replace those itty bitty screws rather than glue them.... but that's me.

 

[big5ifty]

Man, I don't know about Loctite for that application.

The grub screws on an Arken turret are not delicate little things.

Try the purple, if you're going to change them anyway, it'll be a test.

 

[Dgd6mm]

^^^^^^^^^^^^^^^^^^^^

 

[jpjulian]

I'm outvoted,,,,,,,,,,,,,,WTH it's not like it's a Nightforce or something.......

 

[kyotekiller25]

My thoughts are if those grub screws were so great and robust, they'd be doing their job... I'd never loctite any screws on any scope. That's just me though.

 

[Dgd6mm]

Take a turret off of one of those Arken scopes and look what you dealing with.
You bunch of sissy hands.