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Re: Anatomy of the LIF Hunting Riser

PostPosted: Mon Feb 27, 2012 10:18 am
by Bobmeister
Time to start setting the table saw up to cut the limb bed angle. This is critical to get the blade square with the sled.
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Ready to rockImage

The operation was a success
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Rounding over the back to the layout line.
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Re: Anatomy of the LIF Hunting Riser

PostPosted: Tue Feb 28, 2012 1:44 am
by Jumper
Sweet! I love a good build-a-long :D

Re: Anatomy of the LIF Hunting Riser

PostPosted: Tue Feb 28, 2012 8:49 am
by bearauto11
This is awesome to watch!
Thanks!

Re: Anatomy of the LIF Hunting Riser

PostPosted: Fri Mar 02, 2012 11:28 am
by Bobmeister
Ok now it time to put a overlay on the back. .035" Maple and .125" thick Phenolic strip , You can see the clamping jig that will pull it all tight together. Using the wedge that were cut off the riser block glued to a piece off fiberglass. ( got this method from Kirk ;) )

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All clamped up ready for the hot box.
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Out of the hot box and cleaned off
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Re: Anatomy of the LIF Hunting Riser

PostPosted: Fri Mar 02, 2012 11:45 am
by Bobmeister
Next step is to set up the router table with a 3/4" bit for cutting the slot for the Donkey insert. After setting the table up I run a couple off scrap pieces thru the set up that are the same width as the riser. This will tell me if the slot is centered or if I need to adjust my guides
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Before
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After (one pass)
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Centered Within .0015" side to side
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Drilling and tapping for all of the hardware comes next
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Re: Anatomy of the LIF Hunting Riser

PostPosted: Fri Mar 02, 2012 12:11 pm
by Bobmeister
Need to counter bore the bottom side of the Donkey insert .5" diameter X .312" deep to allow the threaded limb bolt insert to be close to the surface. Doing this the limb bolt threads will start 1/16" down from the out side surface.
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Filing off the bevel of the countersink to 1/2" round to fit into the counter bore hole
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I use the donkey insert for a drill guide ( sure wish Jim would make up some steel guides for doing this)
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After I pilot drill the 5/16 hole then drill it out to 27/64 for the 1/2-13 insert treads
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Tappout
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Order of assembly
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Re: Anatomy of the LIF Hunting Riser

PostPosted: Fri Mar 02, 2012 7:52 pm
by Jumper
This is so cool to watch!

Re: Anatomy of the LIF Hunting Riser

PostPosted: Fri Mar 02, 2012 8:34 pm
by 4nolz
do you "prebend" the thick phenolic back riser overlay? It seems like a piece that thick would want to lift.great buildalong!

Re: Anatomy of the LIF Hunting Riser

PostPosted: Fri Mar 02, 2012 11:18 pm
by Bobmeister
4nolz wrote:do you "prebend" the thick phenolic back riser overlay? It seems like a piece that thick would want to lift.great buildalong!


Good eye there nolz, Yep I bend them a little bit past the radius that I want by clamping the phenolic strips to this jig and placing it in the oven at 220 degrees for 30 minuets. When they cool they hold shape and make it a lot easier to clamp together.


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Re: Anatomy of the LIF Hunting Riser

PostPosted: Mon Mar 05, 2012 2:57 pm
by Bobmeister
These are the last pieces in the glue up, all laid out in order.Image

Note the wedges that I tacked on the belly with some CA glue, they keep the clamping presser even. Also added stop block on the back to keep things lined up.
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Clamped up ready to bake.
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