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Author Topic: Something interesting for Hatsan break barrel owners.  (Read 274 times))

Online Blowpipe Sam

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Something interesting for Hatsan break barrel owners.
« on: November 07, 2021, 07:41:52 PM »
Iíve been having some problems with two of my Hatsan break barrels suffering from a barrel pivot screw that keeps loosening.  The pivot screws on the Striker and the Mod 125  both have scallops cut into the head of the pivot screw so that a small guard screw can be used to lock the pivot screw in place.  Except that there is a problem with this design.  This is the tricky part.
  The pivot screw is a flat head that has a slot cut across the screw head. When the pivot screw is tight the guard screw fits into one of the scallops and locks the pivot screw in place.  Unless the scallop is adjacent to the screw driver slot in the top of the screw.
  • Fire base Bert.  The last outpost on the Sopchoppy river.  Florida
My Battery
Hatsan Striker  .25
Hatsan Mod 125  .25
Hatsan Mod 125  .22
Ruger Impact Max .22
FDAR Xisico XS60c .22 
Crosman 1400 .22.  2nd model
Crosman 1400 .22.  1st. Model
Crosman 2240XL .22
Crosman 2100 .177
Crosman 1377 .177
Industry B-3 .177

Online Blowpipe Sam

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Re: Something interesting for Hatsan break barrel owners.
« Reply #1 on: November 07, 2021, 07:47:25 PM »
If the locking scallop is adjacent to the screw driver slot the poor steel used by Hatsan will distort at the edge of the slot and allow the pivot screw to loosen.  This is visible in the photo above.

Below is a Hatsan Mod 125 with the barrel pivot screw correctly tightened so that the guard screw locks into a scallop 1/4 rotation from the edge of the screw driver slot
  • Fire base Bert.  The last outpost on the Sopchoppy river.  Florida
My Battery
Hatsan Striker  .25
Hatsan Mod 125  .25
Hatsan Mod 125  .22
Ruger Impact Max .22
FDAR Xisico XS60c .22 
Crosman 1400 .22.  2nd model
Crosman 1400 .22.  1st. Model
Crosman 2240XL .22
Crosman 2100 .177
Crosman 1377 .177
Industry B-3 .177

Online Blowpipe Sam

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Re: Something interesting for Hatsan break barrel owners.
« Reply #2 on: November 07, 2021, 07:50:39 PM »
The above photo is my .22 cal mod125 which has over 1500 shots through it without loosening.

Below is my Striker showing itís recently replaced and correctly tightened pivot screw.
  • Fire base Bert.  The last outpost on the Sopchoppy river.  Florida
My Battery
Hatsan Striker  .25
Hatsan Mod 125  .25
Hatsan Mod 125  .22
Ruger Impact Max .22
FDAR Xisico XS60c .22 
Crosman 1400 .22.  2nd model
Crosman 1400 .22.  1st. Model
Crosman 2240XL .22
Crosman 2100 .177
Crosman 1377 .177
Industry B-3 .177

Online Blowpipe Sam

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Re: Something interesting for Hatsan break barrel owners.
« Reply #3 on: November 07, 2021, 08:00:00 PM »
Here is a photo of the pivot screw that I removed from my Striker.  The locking scallop adjacent to the screw driver slot is distorted just like the one on my mod 125.

So here is my advice.  When tightening the barrel on a Hatsan springer, be sure that the guard screw fits into a scallop as far as possible from the screw driver slot.  The slot weakens the top of the screw and the cheap steel distorts under repeated cocking stresses.  Eventually it will slip enough to affect accuracy.
  • Fire base Bert.  The last outpost on the Sopchoppy river.  Florida
My Battery
Hatsan Striker  .25
Hatsan Mod 125  .25
Hatsan Mod 125  .22
Ruger Impact Max .22
FDAR Xisico XS60c .22 
Crosman 1400 .22.  2nd model
Crosman 1400 .22.  1st. Model
Crosman 2240XL .22
Crosman 2100 .177
Crosman 1377 .177
Industry B-3 .177

Offline Piotr1967

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Re: Something interesting for Hatsan break barrel owners.
« Reply #4 on: November 25, 2021, 04:14:35 AM »
Dears, isn't it possible to replace those lousy Hatsan screws with others made of better steel ?
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Offline Ilimakko

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Re: Something interesting for Hatsan break barrel owners.
« Reply #5 on: November 25, 2021, 07:38:11 AM »
Haven't looked too hard into this, but my understanding is that Hatsan screws and bolts are of pretty strange sizes, meaning you can't go and buy non-Hatsan replacement screws / bolts. You may need to machine them out of larger stock, with attendant tapping, heat treating etc., all of which together is anything but straight forward, if even possible, to most airgunners.
LGV Master Ultra .22 cal
HW95L .22 cal
D48 .22 cal
350 Mag .25 cal
H135 .25 cal
WFH .22 cal
Fenix 400 .22 cal
G1250 .22 cal
D25 .177 cal (c. 1960)
BSF S54 Match .177 cal (c. 1965)
E-C2 5.4 mm (c. 1920)
FX T12 .22 cal

Offline SteveP-52

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Re: Something interesting for Hatsan break barrel owners.
« Reply #6 on: November 25, 2021, 09:12:20 AM »
Stock screws can be gotten in most hardware stores, just take yours and match them up. I have and found them.

The pivot bolts I've never tried finding but as already said, you may not be able to due to '
the odd sizes, but again, at least take one and try.

As always, a good set of gunsmithing screwdriver bits is always recommended and not just standard screwdrivers.
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Online Smaug2

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Re: Something interesting for Hatsan break barrel owners.
« Reply #7 on: November 28, 2021, 12:58:07 PM »
My AirTact has that same arrangement, and the factory location does indeed use the position where the locking screw engages the edge of the slot on the pivot screw.

It's not a bad design, just the wrong hardware. They should've used Allen or Torx, or even a cheesy Phillips, if they want to save a cent on fasteners...
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| .22 Air Arms S510 | .177 Air Arms TX200 (15 FPE, Motorhead tuned) | .177 Weihrauch HW30s (Vortek 7 FPE) | .177 Brocock Compatto (18 FPE) | .177 Crosman: 357| | .22 Crosman Diamondback | .22 Stoeger X20 S2 | .177 Daisy PowerLine 1200 (CO2 BB) | .22 Hatsan AirTact