Photos and info on 1/8th scale model 5130 #10: Continuation of boom info.

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Blog entry by hookfoot posted 12-07-2019 01:35 AM 1010 reads 0 times favorited 5 comments Add to Favorites Watch
« Part 9: Boom and cylinder for the excavator bucket Part 10 of Photos and info on 1/8th scale model 5130 series Part 11: Booms, cylinders walkways and hand rails. »

. My glue up for the outside pieces are 1/2 in thick. The reason being is so I can get the lip detail on the edges and required thickness for the ears that the cylinders etc need. As you will see I use a lot of tape(any kind, what ever is closest st hand).

The material to the left of the clamps gets cut off. I do this to get the proper placement of the wedge section under the clamps. The two pieces of straight 1/2 in thick stock is just for placement of the wedge section. Look at the concave piece opposite of the clamps and you will see rabbits cut on the outside corners. They are for the straight 1/2in stock glue ups. The parts under the clamps is the same set up. Some layout lines.

Here I am getting started to rout away the material (1/8th deep) for the lip on the edges of the boom. 90% of both sides get this stock removal. The only way I can do this operation with the tools I have. You do what you need to if you want the finish look that I get. If I need to do a step behind my back or standing on my head, that is what I do. Finish product is what maters.

This is how I hog away the 1/8th in stock on the sides after I get the lip cut in place. The face plate on the router is 1/4 in stock. 12in by 12in. This is the detail at the base of the boom where it goes into the chassie. This is the lift boom attachment(part of it).

These three photos show the pieces that get glued in place of the end section that was cut away earlier. Do I have you confused yet. Every once and a while I need to shut my shop door from the outside and go for a drive to get my head back where it needs to be. If you look at the base end you can see some tape under the first coat of paint. There is tape where the boom lift attachment ear goes also. This is how I do my painting. I do not get blow back and bounce of my paint this way. The glue on pieces were located earlier. When I get my glue on pieces in place I mark them for proper alignment, then I use cut off brads that go into holes(pre marked) so these pieces do not slide around once they have the glue on them.
Country boy mentality.

These photos show some of the glue on being done, the layout and location of the hydraulic line details. My wife hand paints the copper pieces with clear coat after I have them bent and soldered where needed. My bends are done around a 1/2in bolt in my vise. I do them by eye(with a lot of good luck). The attachement pieces are made as needed. They all are numbered or marked so I can get them where they need to go after they are painted. This is h how I terminate the bottom ends of the hydraulic lines. I used rubber brake line for this detail. It is what ever size fits #4 solid copper wire nice and snug. There is about 80 feet of #4 copper in both booms and cylinders.

This is the spacer detail so the double lines do not rub to much. I do not have many photos of the reach boom construction but will show what I have another day. My mind and fingers are wore out. Good night and enjoy.

5 comments so far

View crowie's profile


5521 posts in 3444 days

#1 posted 12-07-2019 01:40 AM

Seeing the “HOW” you’ve built it sir, just boggles the mind at the scale along with the engineering craftsmanship to actually make it all work….


-- Lifes good, Enjoy each new day...... Cheers from "On Top DownUnder" Crowie

View Don Broussard's profile

Don Broussard

4113 posts in 3745 days

#2 posted 12-07-2019 02:33 AM

Absolutely amazing detail! That excavator could be a traveling salesman’s sample when it’s done!

-- People say I hammer like lightning. It's not that I'm fast -- it's that I never hit the same place twice!

View Redoak49's profile


5622 posts in 3482 days

#3 posted 12-07-2019 02:38 AM

I am amazed learning how you built it.

View LittleBlackDuck's profile


9454 posts in 2314 days

#4 posted 12-07-2019 11:38 PM

While I have not made comments, please rest assured that your presentations have not gone on blind eyes and I for one greatly appreciate your series and the effort you have taken to document it (over and above the original build).

I am learning heaps and getting great ideas for my upcoming builds..

Thanks again for your effort and please don’t stop.

-- If your first cut is too short... Take the second cut from the longer end... LBD

View htl's profile


5628 posts in 2653 days

#5 posted 12-09-2019 12:41 AM

Beautiful work and we get a real feel for the size of this monster in these photo’s. :-]
If it gets much bigger you’ll be showing us your ceiling crane set up next. lol

-- An Index Of My Model making Blogs

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