How I Make a Handmade 45 RPM Adapter That Actually Fits

The most important thing about a 45 adapter is not the glitter.

I realize this is a mildly shocking statement coming from me.

But it’s true.

The most important thing about a 45 RPM adapter is that it actually fits your record and works on your turntable.

Making one look good is only half the job.

Resin is the medium. Craftsmanship is the process.

It would be easy to describe what I make as a “resin 45 adapter,” because yes, resin is the material I cast.

But that’s a little like describing a piece of jewelry only by the metal it is made from.

The finished piece comes from everything that happens around that material: designing the mold, choosing and arranging what goes inside it, casting, refining the edges, sanding, polishing, inspecting, and testing.

Those steps are what turn a poured object into a finished, functional piece.

And in my case, figuring out the mold was a whole thing.

A little problem called “shrinkage”

Here is one of the things I learned while figuring out how to make 45 adapters:

Resin shrinks as it cures.

Normally that might be a minor detail. But when you are making something that needs to fit precisely inside the center of a record, it is very much not a minor detail.

If the finished adapter ends up too small, you will get an unwanted gap between the adapter and the large center hole of the record, so the record may not stay properly centered when played. If it’s too big, you can’t get your record onto it properly, or it can be difficult to remove without putting unnecessary stress on the record.

If it doesn’t fit, you have made a very cute thing that is not particularly useful as a 45 adapter.

I did not want that. And I should have checked each of the first 50 I made as I went. Call that a lesson learned.

So instead of relying on a generic finished shape and hoping for the best, I developed my own molds and refined their dimensions through months of trial and error to account for what happens during curing.

It was time-consuming.

It was laborious.

I was extremely pleased with myself when I finally got it right.

Precise molds make a difference

My molds are part of what makes ModMini adapters different.

They were developed specifically around the way I cast and finish each piece. The shape gives the adapter a substantial feel and makes it easy to pick up when changing records, while the fit is designed around its actual function.

The underside matters too.

Freshly cast resin does not pop out of a mold looking like a perfectly finished retail object. Rough edges need attention. Surfaces can need refining.

So I hand-sand and polish my adapters rather than treating “out of the mold” as “done.”

That finishing step is not especially glamorous. (TBH, it’s ridiculously messy.) It is also one of the differences between something that merely has the right general shape and something I am comfortable putting my name on.

Then I test it on a real record

Every 45 adapter I make gets tested on my Technics turntable with an actual 7-inch record.

Every one.

Because after all that mold-making, casting, sanding, and polishing, I would like to know that the thing does the thing.

If it doesn’t work, what’s the point?

This is also one reason I think of my adapters as functional design objects rather than purely decorative resin pieces. The glitter, color, safety pins, sprinkles, and other materials are the fun part.

Art is expression. Design is fit for purpose. Fit is non-negotiable.

And yes, about that vintage glitter

Now we can discuss the glitter.

My glittery 45 RPM record adapters are made with vintage glitter, including mid-century material (like aluminum) that has survived for decades before finally ending up inside one of my molds.

I love it because it has a depth and character I rarely see in generic modern glitter. Different shapes, finishes, colors, and materials catch the light in their own ways, and the older pieces can look ethereal once they are suspended in clear resin.

Less “craft aisle.”

More tiny time capsule.

Because the materials themselves vary, vintage-glitter adapters can also end up with subtle differences from one casting to another. That is a feature, not a problem.

I like knowing the piece on your turntable does not look exactly like everyone else’s. (I know I want my adapters to feel like mine. I’m guessing you might too.)

Why go through all this trouble for a 45 adapter?

Because records are objects people care about.

We hunt for them. Collect them. DJ with them. Organize them. Argue about pressings. Remember where we found them. Put certain songs on when we need to feel a very particular thing. Spend way too much money on them.

So I don’t think the accessory sitting in the middle of the record has to be an afterthought. In fact, I have some feelings about why your 45 RPM adapter doesn’t have to be boring.

It can work properly and be unique.

It can be functional and joyful.

It can be beautifully finished and full of vintage glitter.

Those things are allowed to coexist.

You can shop my handmade 45 adapters to see the current batch, or read the full ModMini story for how one unsuccessful search for a gold glitter adapter somehow turned into all of this.

Made with love.

And high standards.