Double Underfit Sled
Stanford Football’s current form of sled provokes improper form and creates terrible technique. The Double Undefit Sled promotes better hand placement and back bend that is seen when blocking in games.
Project Goal
The goal of this project was to create a functional project of my choice. The project must serve a purpose and construct from metal or plastic manufactured by milling, turning, welding, and metal forming.
CAD / Design
In order to accurately model the bend in the tubing flex feature was used. I was able to get the bend radius along with the compression and expansion in the material.
The design was made with Solidworks. It was created with the proper adapters to the sled base and the proper thickness of the tubes used.
The knurling pattern was created by using the 3D spiral sketch and circular to get the diamond pattern.
Manufacturing
On the victor lathe adapter to the sled handles and base was bored out of Al 6061.
In addition to boring the knurling was done on the lathe.
All parts were cut on a cold saw.
Once cut down to the correct dimension all components are tig welded together.
Result
Hand Placement
Flat Back
Bent Elbows
Load of 400lbs