Here are the plans themselves, the drawings and parts list that define the NF4
The known errors in the plans.
A step-by-step set of instructions for building the NF4. You will also need the plans, but these well-illustrated instructions will make it a lot easier to get it right.
This document tells you how to properly position the measuring tapes on the backer board, the toggle board on the T-slot beam, and the bearings so the shaft is aligned on all three bearings.
The AMW-25 digital fish scale was discontinued. In the absence of a direct replacement, we improved the design using an Ultra-Ship shipping scale. Here are the details, both for new builds and retrofits of existing NF4s.
How the NF4 works, and how and why it is different from the NF2.
How to take a reading with your NF4. This is basic to any use, and to calibration as well.
Read this first, before you try to use your NF4 to measure a shaft.
Matching shafts, including:
- Building a matched set of irons
- Building a single club that matches an existing club
How to take a stiffness profile, showing how the stiffness varies along the length of the shaft.
How to find spine and NBP, using both feel-finding (like the NF2) and differential deflection (new for the NF4).
You need to go through these steps when you build your NF4. You also ought to repeat them, to keep your instrument in calibration, at least once a year.
Some clubmakers will prefer to unclutter their bench by wall-mounting their NF4. The NF4 was designed to accommodate wall mounting. Here's how to do it.