Search found 47 matches

by rnordell
Wed Oct 09, 2019 5:51 pm
Forum: Ski/Snowboard Design and Layup
Topic: Section8-titanal
Replies: 38
Views: 5625

Re: Section8-titanal

Phosphoric Acid Anodize (PAA) is one of the best bonding preps out there. Pretty much the "gold standard" for metal bonding prep. At work we have PAA done on aluminum coupons for adhesive characterization tests that we use in the Inston tensile tester. As an alternative I have had good results using...
by rnordell
Sat Oct 05, 2019 5:09 pm
Forum: Aprés Ski Building
Topic: Calculating the Radius
Replies: 2
Views: 177

Re: Calculating the Radius

Don't get too hung up about the "radius" of a ski. The method you found that Atomic published is the same as how FIS requires the measurement to be made to determine the legality of using a particular ski in competition (gotta keep a level playing field). Do a search for the FIS Specifications for A...
by rnordell
Wed Jun 13, 2018 7:25 pm
Forum: Ski/Snowboard Design and Layup
Topic: Cutting out flesh on tip/tail with no edge
Replies: 21
Views: 3481

I really like the oscillating belt and spindle sander made by Ridgid tools. The oscillating helps the belt or spindle wear more evenly. By using the belt along the edge it prevents putting too much pressure on any one area and helps give a smooth edge along the entire length. No subtle nicks from a ...
by rnordell
Tue Nov 07, 2017 7:27 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Waxer manual needed
Replies: 1
Views: 891

Pretty sure I have a manual for mine somewhere in my hanger. I can scan it and email it to you. Send me a PM
by rnordell
Fri Oct 06, 2017 12:00 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: CNC core profiling tools
Replies: 12
Views: 3164

No problem here visualizing it in my head. Just trying to put some numbers to scallop height so people can understand the variables that go into producing it, no matter if you use cutter compensation, handwrite your g-code, or generate it with a CAM program. Regardless, scallop size is a function of...
by rnordell
Thu Oct 05, 2017 9:32 am
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: CNC core profiling tools
Replies: 12
Views: 3164

The scallop height on a 3axis machine from a 1.25" spoil board cutter is pretty small when looking at what it is doing while cutting a ski core. I was curious so I drew it up in CAD to measure it. Assuming a 10mm thickness change over a length of 800mm (about half the length of a slalom ski, 12mm un...
by rnordell
Thu Sep 21, 2017 7:13 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: CNC core profiling tools
Replies: 12
Views: 3164

I'm interested in how you like the rc-2241. It's nice that is ~$50 less than the rc-2250. One thing I like about the 2250 is it still has cutters on the bottom surface that will cut all the way to the centerline of the tool. Because it cuts to the centerline you can plunge and don't always have to r...
by rnordell
Wed Sep 20, 2017 7:17 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: CNC core profiling tools
Replies: 12
Views: 3164

Amana RC-2250. Works great and has indexable/replaceable cutters.

https://www.amazon.com/Amana-Tool-Surfa ... FHPKZ8095Z
by rnordell
Tue Sep 05, 2017 1:08 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Fontaine 680
Replies: 6
Views: 1785

The freewheel is held on with just a nut on the shaft of the eccentric tensioner. The drive side has a square key between the motor shaft and the wheel. If you don't already have it, here is the owners manual with a parts breakdown. http://www.fontaineskituning.com/wp-content/uploads/2015/04/Fontain...
by rnordell
Fri Aug 12, 2016 12:38 pm
Forum: Yard Sale (non commercial)
Topic: looking for a ski bridge
Replies: 5
Views: 2725

Are all the Sports Authority stores closed nationwide yet? I picked up 3 at a MN store for $20 each (2 Adult, 1 Jr.) when they were closing up. The Grindrite style one would not be too difficult to build. Just need access to a sheet metal stretcher/shrinker to curve some aluminum angles and then riv...
by rnordell
Fri Aug 12, 2016 10:47 am
Forum: Ski/Snowboard Design and Layup
Topic: CNC router bit suggestions
Replies: 53
Views: 27952

I'd have to go back and look, but off hand, I think around 15,000 RPM and 150 ipm? This puts the chip load at 0.005. I just looked and see that this agrees with the recommended feeds/speeds.
http://www.amanatool.com/media/custom/u ... 408200.pdf
by rnordell
Thu Aug 11, 2016 1:26 pm
Forum: Ski/Snowboard Design and Layup
Topic: CNC router bit suggestions
Replies: 53
Views: 27952

I bought this bit a few years ago and fell in love with it. A little expensive, but the replaceable inserts are a real nice feature. http://www.amanatool.com/products/cnc-router-bits/planing-hogging-cnc-router-bits/mini-spoilboard-surfacing-rabbeting-with-scorer-2-2-design-insert-cnc-router-bits/rc-...
by rnordell
Fri Aug 05, 2016 11:42 am
Forum: Ski/Snowboard Design and Layup
Topic: Keeping edge flat while bending.
Replies: 14
Views: 5929

Twizz, That sounds like how I built mine and later gketcham's. The flat section on the middle tooth I found helps stabilize the tang on the edge and it lines up the two outside nipper teeth with the edge. The only thing I can think of is that maybe the outside teeth on the nipper, where they contact...
by rnordell
Thu Aug 04, 2016 10:19 pm
Forum: Ski/Snowboard Design and Layup
Topic: Keeping edge flat while bending.
Replies: 14
Views: 5929

I usually do a 4 part edge (not doing many twin tip skis though). A machined aluminum inset on across the tail of the ski, and then a curved section 3-4 inches long that wraps around the tip. The few twin tips I've done have this same 3-4 inch section around the tail. That leaves two long pieces for...
by rnordell
Thu Aug 04, 2016 3:14 pm
Forum: Ski/Snowboard Design and Layup
Topic: Keeping edge flat while bending.
Replies: 14
Views: 5929

Twizz, I'm thinking that gketcham is using the set of nippers that I made for him. Can you post a photo of the jaw design on your set so we can all see what design works well? I also use a nipper but I don't think I can make edges made as fast as you do! Maybe I just fuss too much over them? Thanks,...