Customizable V-Block for holding cylindrical parts. I designed this assembly using OpenSCAD as I wanted to try making parametric assemblies.

Disclaimer: Do not use this part for heavy machining. There's a reason these are made out of steel!

EDIT: I have now added an option called clampAngle. This will allow you to specify the angle of the clamping nut and bolt. By specifying clampAngle = 0 this will allow you to clamp round stock. Specifying clampAngle = 45 will allow for clamping of rectangular materials.

Using the customizer app you can easily change the dimensions of the v-block, the clamp to hold parts and adjust the nut and bolt used to clamp your parts.

For this model I used a 5/16-18UNC bolt and nut for the V-Block Clamp. The bolt that I used is 50mm long. Initially only 25mm of the bolt was threaded so I used a 5/16-18 die to thread the entire bolt shank.

Below are the dimensions used to create the show parts:

//V Block Dimensions //Total V Block Length Length = 75; //V Block Height Height = 50; //V Block Width Width = 50; //Width of v Groove vGrooveWidth = 40; //v Groove notch depth vNotchDepth = 2; //v Groove notch width vNotchWidth = 2;

//Notches in side of v block to allow for the attachment of v block clamp sideDepth = 10; sideWidth = 10; //Tolerance of side notches to ensure good fit between clamp and v block clampSideTolerance = 0.1;

//V Block Clamp Dimensions //Thickness of Clamp clampThickness = 10; //Width of Clamp clampWidth = Length*0.25; //Height of Clamp above v block clampHeight = 35;

//Dimensions of nut/ bolt support on top of v block clamp //Thickness of Nut support clampNutSupportThickness = 15; //Width of nut Support clampNutSupportWidth = 20;

//Dimensions of Nut and Bolt for securing parts in V block //Diameter of bolt boltDiameter = 8.25; boltLength = 50;

//Width of nut- measure corner to corner distance on nut nutWidth = 14.75; //Nut thickness- measure thickness of nut nutThickness = 7.0;

//Diameter of Bolt Knob boltKnobDiameter = 20; //Height of Bolt Knob; boltKnobLength = 20; //Number of knurls around Knob Diameter boltKnobKnurlNum = 15; //Depth of knurls boltKnobKnurlDepth = 1; //Width of knurls boltKnobKnurlWidth = 1; //Angle of knurling boltKnobKnurlAngle = 100;