BiT FiT System

UPDATE (Dec 7-2024):

I use these components regularly and have not had problems, but user Smitty rightfully pointed out the printing strength for the clamps in the default print orientation is the weakest.  I've added two more versions of each size and uploaded the revised Fusion 360 files:

1. No Recess: This eliminates the recess part of the slot, so the clamp can be printed top side down.
2. Chamfered Recess: This version is also printed top side down but adds a chamfer to the recess.  This version requires updated knobs which I've also included.

Background:

This is a completely free and open source system for CNC’s and workshop jigs called the “BiT FiT System” (a combination of my woodturning business “Beauty in Trees”, partial inspiration from the MatchFit System and the idea that I hope you will customize and “FiT” it to your unique needs). 

It can be used with T-tracks or dovetail channels similar to the MatchFit system.  However, unlike the MatchFit system, this design utilizes larger keys that can accommodate ¼-20 nuts and bolts and will hold up a little longer as the spoilboard gets resurfaced.

There is nothing groundbreaking about the designs, and it is inspired by the MatchFit system, Carbide 3D’s Essential Clamps and various other designs I’ve seen over the years. I simply wanted a standardized, cohesive system that encompassed my needs but was flexible enough to be expanded for and by, others.

I’ve included documents outlining the specs as well as my source files from Fusion 360 and Vectric. The Fusion files are fully parametric, and the most-commonly-adjusted parameters are marked as favorites.  Many of the STL’s are also included for those not comfortable with Fusion 360 and simply want to print.

All Fusion 360 files are in Millimeters while CAM files are in inches – sorry, but I typically 3D model in millimeters and mill in inches, but everything is compatible.

I will update this project as accessories are added and for any other fixes or tweaks as they arise.  I encourage you to run with it and “FiT” it to your needs!

Components:

The system comprises the following areas so far, and the included PDF contains details and specs for each component:

• Spoilboard with dog holes and channels (either dovetailed or square for t-tracks)
• Bench Dogs for aligning stock
• Keys, Clamps and Knobs for securing stock

Printing Details:

I typically print components using a 0.4mm nozzle and 0.2 mm layer height or a  0.6mm nozzle and 0.32 mm layer height.  Supports are not required for any components at this time.  Other component-specific concerns are noted in the supporting documentation.