Lyman Xpress Trim Straightwall Case bushings

[pastera]

@Queen Bee brought up the topic
Guy sells one on ebay that requires a hand prime tool to use.
Should also be able to adapt for the Frankford Arsenal Trimmer if anyone has dimensions off that one.

Wrote an OpenSCAD script to create the bushings for straight wall cases (sight unseen)

Just need to get some dimensions from the bushings to finish off and release the script.
Dimensions needed

• Bushing rim diameter
• Bushing rim thickness
• Bushing barrel diameter
• Distance from face of bushing to the cutter

9mm Bushing


Clamp - verified with 9mm, 38/357, 44, 45 (Can make anther version to hold the larger cartridges better but works as is)

 

[Queen Bee]

I will try and get you some pictures of the orange bushings today with calipers on them

 

[pastera]

I will try and get you some pictures of the orange bushings today with calipers on them

Awesome
Also include a list of cases you want to use so I can print up samples to test with.

 

[Queen Bee]

 

[pastera]

@Queen Bee
Can you get the depth from the face of the bushing to the cutter?
Easiest way is to measure how much of a trimmed case sticks out from the face of the bushing (use the depth blade)

That and a list of calibers will get them on the printer tonight.

 

[Queen Bee]

The cutter is adjustable from the top outside face of the bushing to my cutter is 1"

 

[pastera]

Anyone using OpenSCAD?
Will post the STL for the clamp later

// Copyright 2021 Aaron Pasteris - non-commercial use only
Case_Length = 1.290; //[1:0.001:3.5]
Case_Diam_Base = 0.379 ; // [0.125:0.001:0.625]
Case_Diam_Mouth = 0.379; // [0.125:0.001:0.625]
// Reduce for tighter case fit
Case_Clearance = 0.020; // [0.005:0.001:0.100]
// Bushing Rim Diameter

/* [Hidden] */
Rim_Diam = 1.1;
// Bushing Rim Thickness
Rim_Thickness = 0.125;
//Bushing barrel Diameter
Barrel_Diam = 0.689;
// Distance From Face of Bushing to Cutter
Distance_to_Cutter = 1.000;


$fn=60;
inch = 25.4;
Clamp_Offset = 0.085;
Adapter_to_Cutter_Clearance = 0.0625;
Length_of_Adapter = Case_Length - (Clamp_Offset + Adapter_to_Cutter_Clearance);

module barrel() {
    difference(){
        translate([0,0, Clamp_Offset * inch])
        cylinder(h = Length_of_Adapter * inch, d = Barrel_Diam * inch);
        cylinder(Case_Length * inch, (Case_Diam_Base + Case_Clearance)/2 * inch, (Case_Diam_Mouth + Case_Clearance)/2 * inch);
        }
    }

module rim(){
        translate([0,0,(Case_Length - Distance_to_Cutter)*inch]){
            difference(){
                cylinder(h = Rim_Thickness * inch, d = Rim_Diam * inch);
                translate([0,0,-0.01]) {
                    cylinder(h = Rim_Thickness * inch + 0.02, d = Barrel_Diam * inch -0.01);
                }
            }
        }
    }
   
               
module Bushing(){
    union(){
        barrel();
        rim();
        };
    }
       
Bushing();

Edit: fixed to show formatting

 

[pastera]

With the cutter 1" from the bushing face that limits the shortest case that can be used but the adjuster barrel looks like it has a lot of adjustment.

I would think at the minimum the cutter would not contact a standard bushing so you might be able to trim something as short as 10mm or 40 but not 9mm

 

[pastera]

Redid as a print in place hinge

Just need a list of cases to do adapters for - will print up and get to QueenBee for testing