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Thread: spring compressor for HW45

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  1. #1
    Join Date
    Jun 2016
    Location
    maidstone
    Posts
    860
    I bought a spring compresser from a well known gun modifier and was surprised it was a modified sash cramp as a carpenter with loads of the bloody things it's sat in the cupboard still.... As with anything if you set it up right it will work..
    Firstly I put a sash cramp in a vice to hold it, it saves a lot of messing about and saves having 3 pairs of hands....
    Wind the head in almost fully and THEN adjust to the closest pin hole on the cramp, if it looks like its miles back tape a piece of softwood to the front end (electrical tape is your friend).... Clamp down, remove pin and unwind.... Normally I put my hand over the action just to control any wayward movements..... Once slack that's job done.
    Most spring guns will only require about 2/3rds travel
    Assembly is the reverse of what you have done.... I hope this helps, you could try Screwfix, Toolstation or my preference is Axminster tools and ironically these spring compresses can be used for other jobs

  2. #2
    Join Date
    Mar 2011
    Location
    Sheffield
    Posts
    2,466
    Whatever clamp you use, you will find life a lot easier if you make up a small top hat plug for the front end of the cylinder.
    The plug that is is cross-pinned has a hole running axially through it, into which a top hat plug can engage. It stops the spring and end plug from wandering off when compressing the parts back together. The top hat could be made from wood if nothing else is available.
    I made one from aluminium and I grip it in the tailstock of my lathe, the cylinder is gripped in the chuck and the lathe acts as my spring compressor - but I also made on for a mate and he screwed his to a sash clamp with good results.

  3. #3
    Join Date
    Nov 2022
    Location
    Workington
    Posts
    53
    A pipe clamp (from that well known site beginning with E) would do the job.

  4. #4
    tinbum's Avatar
    tinbum is online now Killer Vampire Lesbians on scooters
    Join Date
    Aug 2007
    Location
    Daarn Saaarf!
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    19,539
    This slightly less Mcgyver version might help

    https://www.airgunmagazine.co.uk/fea...ng-compressor/

  5. #5
    Join Date
    Dec 2009
    Location
    Cheltenham
    Posts
    2,561
    I based mine on a Sealey motorbike fork compressor. Used a short bit of angle iron across the fork and used some wood to make appropriate 'cups' to support/contain either end.

    https://www.sealey.co.uk/product/563...ing-compressor

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