FX .25 Wildcat Hammer Spring Adjuster
- Thread starter SeeOhTwo
- Start date
I’m surprised no one has figured out in putting a form of filler material like rubber washers or a plastic piece, of which both types would be the thickness of the gap from the hammer adjustment nut to the stock. How can a nut back out when it’s being held by a wedge between itself and the stock? That thickness would be dependent on a measurement between the back of the adjustment nut and the stock, after you finalized the hammer spring adjustment. Easy and simple. That’s always been on my mind to do, once I got around to finding the sweet spot of adjustment.
of course, this wedge method would not work if you’ve already drilled out an access hole thru the rear of your stock, like the diameter of your adjustment nut.
of course, this wedge method would not work if you’ve already drilled out an access hole thru the rear of your stock, like the diameter of your adjustment nut.
Upvote 0
G
Guest
Guest
...paraphrased from a previous post on this subject...
Wildcats have a "hammer spring adjustment nut" that threads into the rear of the breech block, which is used to adjust the hammer spring tension. The problem with it is that it sits very loose in the breech block threads, and if thread lock is not used the shot vibration will cause it to back out over time. This causes the velocity to change from where it set and consequently the accuracy is affected. To prevent this nut from backing out from its initial setting the manufacturer uses thread lock to hold this nut in place. The only way to free it up to make adjustments is to use a heat gun or micro torch to heat up the nut until the thread lock fails.
Many of us have struggled to find a way to hold this nut in place after adjusting it without having to add more thread lock to it, which necessitates heating it up all over again each time we want to make another adjustment. I came up with a new idea that actually works, and does no harm to the threads in the breech block, nor does it require the use of thread lock or torches.
I drilled a couple holes in the hammer spring adjustment nut and put Delrin balls in the holes. This puts tension on the nut and holds it in place. I made the hole slightly smaller than the Delrin ball so that I had to press the ball into the hole with a pair of pliers. Here are some pictures showing what I did…and it works perfectly! Try it and you will like the way this modified hammer spring nut it firmly holds its position no matter how many times you adjust it!
All the best, Chuck
Wildcats have a "hammer spring adjustment nut" that threads into the rear of the breech block, which is used to adjust the hammer spring tension. The problem with it is that it sits very loose in the breech block threads, and if thread lock is not used the shot vibration will cause it to back out over time. This causes the velocity to change from where it set and consequently the accuracy is affected. To prevent this nut from backing out from its initial setting the manufacturer uses thread lock to hold this nut in place. The only way to free it up to make adjustments is to use a heat gun or micro torch to heat up the nut until the thread lock fails.
Many of us have struggled to find a way to hold this nut in place after adjusting it without having to add more thread lock to it, which necessitates heating it up all over again each time we want to make another adjustment. I came up with a new idea that actually works, and does no harm to the threads in the breech block, nor does it require the use of thread lock or torches.
I drilled a couple holes in the hammer spring adjustment nut and put Delrin balls in the holes. This puts tension on the nut and holds it in place. I made the hole slightly smaller than the Delrin ball so that I had to press the ball into the hole with a pair of pliers. Here are some pictures showing what I did…and it works perfectly! Try it and you will like the way this modified hammer spring nut it firmly holds its position no matter how many times you adjust it!
All the best, Chuck
Upvote 0
G
Guest
Guest
Big Ragu, how do you like the hammer spring adjustment nut I made for you like the one shown above? Is it holding its position without you having to cut up your stock?
Always the best, Chuck
Always the best, Chuck
Upvote 0
So far I like it, but like when we chatted today I haven’t touched the gun since you and I shot it up with steroids, lol. Thanks again, btw. All these years I thought school was over, but you made me feel like David Carradine in King Fu- “patience Grass Hoppah!!!”.
my first order of to do is to locate that minuscule leak, and I have the perfect fine mist spray bottle for it. In time as i shoot the gun I’ll know for sure if that custom hammer nut you made will hold that spring back.
the good thing since you polished that back side that is the side that one sees at the rear of the gun, I can easily see the 9:00 red paint mark I put on there, so any movement(if any) will be seen.
Keep you posted as always
my first order of to do is to locate that minuscule leak, and I have the perfect fine mist spray bottle for it. In time as i shoot the gun I’ll know for sure if that custom hammer nut you made will hold that spring back.
the good thing since you polished that back side that is the side that one sees at the rear of the gun, I can easily see the 9:00 red paint mark I put on there, so any movement(if any) will be seen.
Keep you posted as always
Upvote 0
That pic of the stuff in the bag look like Moth balls, I mean, real moth balls, lol
ha ha!! It actually is a great design, Chuck. No lock tite to deal with, it’s sorta like what Tim Hill of Hill Airguns does to keep screws from backing out, by slipping in fishing line in the threads or in the case of a grub screw locking down a hammer adjustment nut on the side of the nut, he would drop in a tiny length of weed eater line that the grub screw would mash against the side of the hammer spring adjustment nut’s threads
ha ha!! It actually is a great design, Chuck. No lock tite to deal with, it’s sorta like what Tim Hill of Hill Airguns does to keep screws from backing out, by slipping in fishing line in the threads or in the case of a grub screw locking down a hammer adjustment nut on the side of the nut, he would drop in a tiny length of weed eater line that the grub screw would mash against the side of the hammer spring adjustment nut’s threads
Upvote 0
Plumbers puddy, about a buck at the local orange store. Roll up a booger size ball and smash it at the bottom of the adjuster. Wont back out, guaranteed.
Upvote 0
Just saw this post. I'm going to be replacing o-rings on my Streamline .22. and might end up tinkering with the hammer spring adjustment. Found these brass plugs on eBay & Amazon. For $10 I thought I would give them a try
Metric Plug M16 M16X1 M16X1.0 Thread Allen Socket Head Brass
by DYNAPEX
https://www.amazon.com/gp/product/B07MJHYVFP/ref=ox_sc_act_title_1?smid=A1L90E4GEJR5BT&psc=1
https://www.ebay.com/itm/Metric-Plug-M16-M16X1-M16X1-0-Thread-Allen-Socket-Head-Brass-KV/163466406190?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
Metric Plug M16 M16X1 M16X1.0 Thread Allen Socket Head Brass
by DYNAPEX
https://www.amazon.com/gp/product/B07MJHYVFP/ref=ox_sc_act_title_1?smid=A1L90E4GEJR5BT&psc=1
https://www.ebay.com/itm/Metric-Plug-M16-M16X1-M16X1-0-Thread-Allen-Socket-Head-Brass-KV/163466406190?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
Upvote 0