DIY Trimmer with Giraud cutter

[chromatica]

I’d like to share some pics of a power trimmer I built for prepping my 260 cases.

Through a buddy of mine, I discovered that Doug Giraud makes a Tri-way cutter head for several of the most popular calibers. One is for the 308 family of cartridges, which includes 260 Remington. The cutter head is designed to be chucked into a power drill but Giraud encourages his customers to come up with their own solutions.

I scavenged a 12-volt motor from a Shurflo pump and mounted it on a piece of phenolic plywood. Grainger sells a mandrel that accepts a 5/16 motor shaft on one end and is threaded for a 3/8 drill arbor on the other, so I picked up one of those. I rooted around again in my stores and found a chuck from an old Makita cordless drill and screwed it onto the arbor. The finishing touch is a pillow block bearing that accepts a ¾ inch shaft. It just fits the fat part of the cutter head shank. This extra support is needed to stabilize the long and heavy shaft components.

The motor is connected to a variable voltage power supply. It whirs pretty nicely at 13.8V but I find that the motion smooth’s out at about 10V.

I can now trim a tray of 50 cases in less than 10 minutes.

 

[Jackal2016]

A fine example of ingenuity and thinking outside the box. ...so to speak. Looks good.

 

[jpx2rk]

I used a HF buffer motor for my set up. It's a heavy beach, but it don't move once I set it up and can really trim some brass. I like that you handle the brass 1x for 3 functions in brass prep.

 

[Straightshooter1]

I’d like to share some pics of a power trimmer I built for prepping my 260 cases.

Through a buddy of mine, I discovered that Doug Giraud makes a Tri-way cutter head for several of the most popular calibers. One is for the 308 family of cartridges, which includes 260 Remington. The cutter head is designed to be chucked into a power drill but Giraud encourages his customers to come up with their own solutions.

I scavenged a 12-volt motor from a Shurflo pump and mounted it on a piece of phenolic plywood. Grainger sells a mandrel that accepts a 5/16 motor shaft on one end and is threaded for a 3/8 drill arbor on the other, so I picked up one of those. I rooted around again in my stores and found a chuck from an old Makita cordless drill and screwed it onto the arbor. The finishing touch is a pillow block bearing that accepts a ¾ inch shaft. It just fits the fat part of the cutter head shank. This extra support is needed to stabilize the long and heavy shaft components.

The motor is connected to a variable voltage power supply. It whirs pretty nicely at 13.8V but I find that the motion smooth’s out at about 10V.

I can now trim a tray of 50 cases in less than 10 minutes.

Very nice!

If I were doing this, I'd set it up to run in a vertical position to be sure no filings find their way into any of the cases.

 

[max evans]

I’d like to share some pics of a power trimmer I built for prepping my 260 cases.

Through a buddy of mine, I discovered that Doug Giraud makes a Tri-way cutter head for several of the most popular calibers. One is for the 308 family of cartridges, which includes 260 Remington. The cutter head is designed to be chucked into a power drill but Giraud encourages his customers to come up with their own solutions.

I scavenged a 12-volt motor from a Shurflo pump and mounted it on a piece of phenolic plywood. Grainger sells a mandrel that accepts a 5/16 motor shaft on one end and is threaded for a 3/8 drill arbor on the other, so I picked up one of those. I rooted around again in my stores and found a chuck from an old Makita cordless drill and screwed it onto the arbor. The finishing touch is a pillow block bearing that accepts a ¾ inch shaft. It just fits the fat part of the cutter head shank. This extra support is needed to stabilize the long and heavy shaft components.

The motor is connected to a variable voltage power supply. It whirs pretty nicely at 13.8V but I find that the motion smooth’s out at about 10V.

I can now trim a tray of 50 cases in less than 10 minutes.

Is there any way to get a vedo of it working and some info, pictures and such, I bought a cheep drill press at a pawn shop and was going to set it up as a trimmer.
Mjevans48@hotmail.com
Thanks Max Evans 832-414-0293

 

[archerforkids]

I have spent waaaay too much time looking at motors for this very idea. I never dreamed how many diffeent arrangements a motor can be bought in. Good for you for figuring this out sir!! That looks good!!

 

[LVLAaron]

Takes up a bit more space, but horrible freight has a little drill press that works great for this kind of trimmer. You can pick it up for 50 bucks sometimes.

 

[archerforkids]

How many RPMs are you turning?

 

[boltfluter]

I’d like to share some pics of a power trimmer I built for prepping my 260 cases.

Through a buddy of mine, I discovered that Doug Giraud makes a Tri-way cutter head for several of the most popular calibers. One is for the 308 family of cartridges, which includes 260 Remington. The cutter head is designed to be chucked into a power drill but Giraud encourages his customers to come up with their own solutions.

I scavenged a 12-volt motor from a Shurflo pump and mounted it on a piece of phenolic plywood. Grainger sells a mandrel that accepts a 5/16 motor shaft on one end and is threaded for a 3/8 drill arbor on the other, so I picked up one of those. I rooted around again in my stores and found a chuck from an old Makita cordless drill and screwed it onto the arbor. The finishing touch is a pillow block bearing that accepts a ¾ inch shaft. It just fits the fat part of the cutter head shank. This extra support is needed to stabilize the long and heavy shaft components.

The motor is connected to a variable voltage power supply. It whirs pretty nicely at 13.8V but I find that the motion smooth’s out at about 10V.

I can now trim a tray of 50 cases in less than 10 minutes.

Nicely done. Would almost make trimming fun, well almost.

Paul