Home Tournaments Calendar Weather Merchandise Sponsors

Go Back   Spearboard.com - The World's Largest Spearfishing Diving Boating Social Media Forum > Spearfishing Gear > All About Guns

All About Guns What's your weapon of choice, and why? Discuss the beloved speargun here!

Reply
 
Thread Tools Rate Thread Display Modes
Old 02-05-2018, 07:50 PM   #1
Charles dT
Registered User
 
Join Date: Nov 2017
Location: San Francisco, CA
Posts: 106
SKOGSTA, the Ikea speargun…1st build, few tools—

Hello Spearboard friends,

Follow me along on my quest for my 1st speargun build! Here you won’t find perfection but you’ll find resourcefulness and a few design ideas! I couldn’t post until recently so the project is actually finished, but it will take me a while to post the whole build.
We’re trying to go from here to here:
Attached Thumbnails
Click image for larger version

Name:	bench.jpg
Views:	156
Size:	124.7 KB
ID:	236782   Click image for larger version

Name:	002sketch.jpg
Views:	140
Size:	122.9 KB
ID:	236783  
Charles dT is offline   Reply With Quote
Old 02-05-2018, 07:54 PM   #2
Charles dT
Registered User
 
Join Date: Nov 2017
Location: San Francisco, CA
Posts: 106
Re: SKOGSTA, the Ikea speargun…1st build, few tools—

Where I live we often have poor visibility conditions so I was beginning to look for a short gun like the RIFFE 00 and thought that trying to build one myself would be great for a few reasons
-hoping to come out cheaper or as same price as a new gun (that might be true if you don’t have to buy a new shaft and a mech, but otherwise near impossible)
-accuracy being less of an issue for such a short range gun my thought process is that I can learn on this one and make a better job on a big blue water speargun if that ever happens.
I would also like to thank a few spearos like spearq8, Tin Man, Wood Man, Phil Herranen, Ric Fallu, Behslayer etc who are incredible contributors to this board and really inspiring. I’m sure I left out a few!

I really don’t have many tools compared to most builders here, namely a hand held drill, an orbital sander and few hand tools like a saw, a wood chisel and a few files. I wouldn’t mind using more equipment, I just don’t have it so I’m using what I have.

What I am trying to build:
-the shortest possible speargun that can hold a 28” RIFFE shaft.
- the design that allows for the longest bands possible
-positioning the handle as high as possible as I can for accuracy and recoil reasons discussed many times here. Probably not an issue on a gun this size and power, but it’s to get see what issues you run into when you build that way.
-open track as would be expected on a short cave speargun
-trying to minimise number of spare parts to buy, so might not go with a bungee or swivels
- being a cave gun would like to try and integrate somewhat the flashlight.
-I also designed the length of the muzzle just long enough to lock the flopper against the shaft.

-also I decided pretty early that I would skip ballast considerations. Ideally I would like this gun to sink loaded and float unloaded so I could mark spots (useful in my low viz areas) but it was adding an extra layer of complexity so for my first build I scratched this one off the list

Last edited by Charles dT; 02-06-2018 at 05:04 PM. Reason: forgot ballast!
Charles dT is offline   Reply With Quote
Old 02-05-2018, 07:59 PM   #3
Charles dT
Registered User
 
Join Date: Nov 2017
Location: San Francisco, CA
Posts: 106
Re: SKOGSTA, the Ikea speargun…1st build, few tools—

First step was to dissemble the bench, easy enough. That yielded 4 legs that I could then hope to turn into a speargun. The reason I chose to do that is that is was the only way I could think of to get sections of wood roughly dimensionally correct "off the shelf".
Attached Thumbnails
Click image for larger version

Name:	20171221_093846.jpg
Views:	69
Size:	133.4 KB
ID:	236785   Click image for larger version

Name:	20180103_181749.jpg
Views:	73
Size:	135.6 KB
ID:	236786   Click image for larger version

Name:	20180104_190357.jpg
Views:	67
Size:	133.4 KB
ID:	236787  
Charles dT is offline   Reply With Quote
Old 02-05-2018, 10:08 PM   #4
Charles dT
Registered User
 
Join Date: Nov 2017
Location: San Francisco, CA
Posts: 106
Re: SKOGSTA, the Ikea speargun…1st build, few tools—

Getting this right was hell...especially with my level of experience. I did my best, and tried to get close but measuring various points with the caliper and then removing high spots with the wood chisel
Attached Thumbnails
Click image for larger version

Name:	20180103_185239.jpg
Views:	56
Size:	130.2 KB
ID:	236788   Click image for larger version

Name:	20180104_190413.jpg
Views:	55
Size:	122.5 KB
ID:	236789   Click image for larger version

Name:	20180105_174813.jpg
Views:	60
Size:	130.2 KB
ID:	236790  
Charles dT is offline   Reply With Quote
Old 02-05-2018, 10:10 PM   #5
Charles dT
Registered User
 
Join Date: Nov 2017
Location: San Francisco, CA
Posts: 106
Re: SKOGSTA, the Ikea speargun…1st build, few tools—

I glued that part with Titebond III. I intended iniatially to use epoxy but it hadn't arrived yet.
Attached Thumbnails
Click image for larger version

Name:	20180105_174351.jpg
Views:	60
Size:	130.2 KB
ID:	236791   Click image for larger version

Name:	20180106_090411.jpg
Views:	67
Size:	140.6 KB
ID:	236792  
Charles dT is offline   Reply With Quote
Old 02-05-2018, 10:15 PM   #6
Charles dT
Registered User
 
Join Date: Nov 2017
Location: San Francisco, CA
Posts: 106
Re: SKOGSTA, the Ikea speargun…1st build, few tools—

At that point I paused 2 hours to slap together a workbench since I was working mainly on the floor garage until then..
That is the 2 pieces glued up together
Then I built a sort of jig to start making the part for the shaft. On the inside side of the jig I made a slight cut running dead center. The basic process was as follows:
1) wrap a piece of sand paper around a drill bit
2) position the drill bit/ sand paper in the jig (holds in place with the slot)
3) start sanding nice and slow
Attached Thumbnails
Click image for larger version

Name:	20180106_134121.jpg
Views:	61
Size:	138.3 KB
ID:	236793   Click image for larger version

Name:	20180106_195149.jpg
Views:	64
Size:	135.7 KB
ID:	236794   Click image for larger version

Name:	20180106_200923.jpg
Views:	70
Size:	138.9 KB
ID:	236795   Click image for larger version

Name:	20180106_203001.jpg
Views:	69
Size:	137.7 KB
ID:	236796  
Charles dT is offline   Reply With Quote
Old 02-05-2018, 10:22 PM   #7
Charles dT
Registered User
 
Join Date: Nov 2017
Location: San Francisco, CA
Posts: 106
Re: SKOGSTA, the Ikea speargun…1st build, few tools—

Needless to say this part took me infinite patience...
by the way the sand paper I have is 120/150/220/400.
I think I went from 120 up to 220 at that step and later on before coating with Epoxy I went to 400.

It took a while but it came out very straight and roughly the same depth at all points.
Attached Thumbnails
Click image for larger version

Name:	20180106_204534.jpg
Views:	58
Size:	133.8 KB
ID:	236797   Click image for larger version

Name:	20180106_211902.jpg
Views:	57
Size:	131.5 KB
ID:	236798   Click image for larger version

Name:	20180106_213452.jpg
Views:	56
Size:	143.0 KB
ID:	236799  
Charles dT is offline   Reply With Quote
Old 02-05-2018, 10:26 PM   #8
Charles dT
Registered User
 
Join Date: Nov 2017
Location: San Francisco, CA
Posts: 106
Re: SKOGSTA, the Ikea speargun…1st build, few tools—

next step was to to start making the hole for the mech.
As you can see on the first picture, the track for the shaft extends slightly in the area I'm about to chisel out.

Although the end result was really rough looking the mech was absolutely snug which was my main goal.
Attached Thumbnails
Click image for larger version

Name:	20180107_080424.jpg
Views:	52
Size:	137.7 KB
ID:	236800   Click image for larger version

Name:	20180107_081737.jpg
Views:	45
Size:	136.2 KB
ID:	236801   Click image for larger version

Name:	20180107_082326.jpg
Views:	49
Size:	129.8 KB
ID:	236802   Click image for larger version

Name:	20180107_083032.jpg
Views:	51
Size:	137.6 KB
ID:	236803  
Charles dT is offline   Reply With Quote
Old 02-05-2018, 10:29 PM   #9
Charles dT
Registered User
 
Join Date: Nov 2017
Location: San Francisco, CA
Posts: 106
Re: SKOGSTA, the Ikea speargun…1st build, few tools—

I also built a little template of the mech in a scrap piece of plywood to help me assess the depth was OK. I was trying to get the mech as low as possible, but couldn't go too low as I also had to be able to keep some material below when I was going to dovetail the handle underneath.
Attached Thumbnails
Click image for larger version

Name:	20180107_085548.jpg
Views:	51
Size:	134.3 KB
ID:	236804   Click image for larger version

Name:	20180107_091913.jpg
Views:	50
Size:	132.8 KB
ID:	236805   Click image for larger version

Name:	20180107_092723.jpg
Views:	49
Size:	127.1 KB
ID:	236806  
Charles dT is offline   Reply With Quote
Old 02-05-2018, 10:33 PM   #10
Charles dT
Registered User
 
Join Date: Nov 2017
Location: San Francisco, CA
Posts: 106
Re: SKOGSTA, the Ikea speargun…1st build, few tools—

I then started drilling 3 holes all the way through for the trigger part. That was probably my first big mistake in the build, I end up completely off center. To make things worse I thought it would be ok and went ahead instead of fixing it. More on that later...
Attached Thumbnails
Click image for larger version

Name:	20180107_093100.jpg
Views:	49
Size:	139.0 KB
ID:	236807   Click image for larger version

Name:	20180107_093918.jpg
Views:	46
Size:	142.0 KB
ID:	236808  
Charles dT is offline   Reply With Quote
Old 02-05-2018, 10:34 PM   #11
Charles dT
Registered User
 
Join Date: Nov 2017
Location: San Francisco, CA
Posts: 106
Re: SKOGSTA, the Ikea speargun…1st build, few tools—

some pics on the depth evaluation.
Attached Thumbnails
Click image for larger version

Name:	20180107_095940.jpg
Views:	39
Size:	141.5 KB
ID:	236809   Click image for larger version

Name:	20180107_100805.jpg
Views:	40
Size:	137.6 KB
ID:	236810  
Charles dT is offline   Reply With Quote
Old 02-05-2018, 10:39 PM   #12
Charles dT
Registered User
 
Join Date: Nov 2017
Location: San Francisco, CA
Posts: 106
Re: SKOGSTA, the Ikea speargun…1st build, few tools—

Ok, so you remember how I wanted to have the longest bands possible on a short gun? A simple way to go in that direction is to have a longer muzzle.
I also felt that it might make a speargun more silent (ie, not clicking against rocks or the shaft) if the flopper is actually locked in place when the gun is loaded.

With that in mind I decided to make the muzzle just long enough that a tiny portion of the flopper sits on the muzzle. I therefore cut out a resting shelf for the flopper.

[in retrospective probably a bad move as it makes the speargun more difficult to load, but as I don't shoot much yet, not necessarily an issue for me]

As for the band lengths my bands are nearly 2" longer than a RIFFE model of similar size a buddy has.
Attached Thumbnails
Click image for larger version

Name:	20180107_104545.jpg
Views:	37
Size:	129.7 KB
ID:	236811   Click image for larger version

Name:	20180107_110614.jpg
Views:	35
Size:	130.7 KB
ID:	236812  
Charles dT is offline   Reply With Quote
Old 02-05-2018, 10:41 PM   #13
Charles dT
Registered User
 
Join Date: Nov 2017
Location: San Francisco, CA
Posts: 106
Re: SKOGSTA, the Ikea speargun…1st build, few tools—

Next step was to cut out the line release shelf.
Attached Thumbnails
Click image for larger version

Name:	20180107_113453.jpg
Views:	39
Size:	132.2 KB
ID:	236813   Click image for larger version

Name:	20180107_113939.jpg
Views:	43
Size:	136.7 KB
ID:	236814   Click image for larger version

Name:	20180107_115022.jpg
Views:	40
Size:	133.1 KB
ID:	236815  
Charles dT is offline   Reply With Quote
Old 02-05-2018, 10:42 PM   #14
Charles dT
Registered User
 
Join Date: Nov 2017
Location: San Francisco, CA
Posts: 106
Re: SKOGSTA, the Ikea speargun…1st build, few tools—

Once the track was clearly defined I did a lot of sanding by hand without the jig, just a drill bit and some sand paper.
Attached Thumbnails
Click image for larger version

Name:	20180107_151558.jpg
Views:	40
Size:	134.0 KB
ID:	236816  
Charles dT is offline   Reply With Quote
Old 02-05-2018, 10:46 PM   #15
Charles dT
Registered User
 
Join Date: Nov 2017
Location: San Francisco, CA
Posts: 106
Re: SKOGSTA, the Ikea speargun…1st build, few tools—

Next I drilled the band holes, the bands are going to be 14mm, and the largest drill bit I have is 18 (or 20?) anyway, ahead I went and did that.

You can also see sketches on the muzzle, I initially wanted to sculpt grooves to guide the bands but later gave up as I am already working with a pretty low spec piece of wood so didn't want to remove too much material.
Attached Thumbnails
Click image for larger version

Name:	20180107_174454.jpg
Views:	36
Size:	132.8 KB
ID:	236817   Click image for larger version

Name:	20180107_175245.jpg
Views:	38
Size:	133.4 KB
ID:	236818  
Charles dT is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 12:29 PM.


The World's Largest Spearfishing Diving Social Media Forum Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright ©2002 - 2014 Spearboard.com