1. Set the width of cut to 1", lower the saw blade completely and do not turn on the saw for this test.
2. Using a feather board or other means to hold a scrap 3/4" stock about 3" wide and 9" long against the rip fence at the normal starting position in front of saw blade.
3. Use a regular Push Stick to push the stock at the trailing end behind the KEEPER piece. This is the spot where the Push Stick will push the stock during actual cutting.
Note: When ripping narrow strips of the similar width as illustrated above, removal of the blade cover, anti-kick back pawls combination and any hold-down attached to the rip fence becomes necessary due to the interference of any pusher's feeding process and lack of room for the blade cover between the rip fence and the saw blade.
Slide 2 - Stock walks away from fence = Kickback!!!
As the push stick pushes the stock forward, the stock gradually "walks away" from the rip fence because there is not any easy way to apply pressure to keep the stock to stay against the fence. In actual cutting operations, when the KEEPER piece shifts into the rear upward spinning saw teeth, the stock will be pushed upward and cause kickback. In this particular example, the "walk-away" occurred before the stock reached the normal splitter position (if you use one) - an indication that appropriate control is required to keep the stock against the fence between the hold-in feather board and the splitter.
Slide 3 - The missing element - pressure against the fence.
Now, use your fingers to feed the same stock from the top surface of the KEEPER portion instead of the trailing end, the position and the friction of your fingers over the stock will keep the stock against the fence throughout the feeding process. This test signifies a regular Push Stick only PUSHES the stock from trailing end (shown in Picture 2) but would not control the stock agsinst the fence. Obviously, you would not want to use your fingers to feed a stock of that size in actual cutting, a GRR-Ripper should be used as shown in Picture 4.
Slide 4 - The GRR-Ripper gives you the CONTROL you need.
The GRR-Ripper provides three directional controls simultaneously - not only on the keeper piece - but on both sides of the stock during the entire ripping operation. This is simply not obtainable from any other tool/accessories, or in combination.
1. RED ARROWS: Balanced Downward Control on both sides.
2. BLUE ARROWS: Parallel and Forward Feeding Control on both sides - eliminates bare hand feeding.
3. WHITE ARROWS: Control the stock and keep it against the rip fence. Notice the White Arrow pressure is no longer required and has no effect (in this setup) on the OFF-CUT portion when the stock is cut into two. That is because the GRR-Ripper is gliding against the fence (Yellow Arrow) as one whole unit in one single parallel direction; all components including all the Non-Slip Pads are moving in the same parallel direction regardless the stage of the operation. This also illustrates the GRR-Ripper maintains the stock in its original position during machining.