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Hatch Pulls

Posted: May 2nd, '09, 15:02
by CaptPatrick
For those that missed the discussion of hatch pulls on the "Swap and Sell" section of the board, and as a follow up for those involved, here a quick series of images on how they are made and work:

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This example is for the double pull that would be needed for a larger hatch cover such as a fish box lid.

I've turned down the hex heads of two 1/4x20 2" bolts to be about 1/16" high and 3/8" in diameter. The parts are clamped tightly to a welding table and TIGed at 1 amp fusing with a series of 1 second shots.

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The holes in the hatch cover are drilled slightly over sized and heavily counter sunk to accept the fillet of the weld, allowing the plate to lay flat.

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Next, using a hole saw, cut out pockets on the underside of the hatch to accept 3/4" PVC end caps.

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Flatten the top of the PVC cap and embed it using thickened resin,

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Clean up excess resin including the countersunk holes on the hatch top.

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Flush the caps down nearly to the hatch surface and re-drill the holes from the top surface.

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The rest is cosmetics....

For lighter/smaller hatch covers, just a single round disc is used and as small as a #10 flat head machine screws can be used for the pin.

Br,

Patrick

Posted: May 3rd, '09, 07:54
by Harry Babb
Thanks for the visuals Pat. I intend to copy exactly what you have shown.....so simple yet so effective.

Harry

Posted: May 3rd, '09, 08:03
by JeremyD
That's GREAT - thank you.

Anybody know a source for the clear plastic "tabs" that the B28 has on the single pulls? This is definitely on my project list as I don't want water intrusion in my hatches and them getting soft.

Posted: May 3rd, '09, 08:23
by CaptPatrick
Jeremy,

Remove the carriage bolts, over-drill the holes, and sleeve the holes with PVC pipe... See: Hardware Mounting in Composites in the Tips Section.

Br,

Patrick

Re: Hatch Pulls

Posted: Sep 4th, '13, 12:06
by Navatech
What's the purpose of the 3/4" PVC end caps?

Re: Hatch Pulls

Posted: Sep 4th, '13, 12:31
by CaptPatrick
Mainly to keep any water from the core... They also make a more cosmetically appealing execution and allow for shorter bolts and less hanging down below the hatch cover.

Re: Hatch Pulls

Posted: Sep 6th, '13, 21:06
by Bob H.
Slick trick Capt. Pat, do you buff n polish the pull or paint to match? BH

Re: Hatch Pulls

Posted: Sep 6th, '13, 21:25
by CaptPatrick
Haven't tried painting them, Bob, since they get a lot of foot trafic, same with high polish... Mostly they're sanded totally flat and brought up to a sheen through 600 wet. Sharp edges are beveled with a fine file.

I prep the bolt head by turning it on a lathe to leave just a smidgen of material and then fuse it with the TIG torch using no filler material.