Chief Delphi - New Products for 2016: Speculation, Wants

Page 2 of 2

Show 100 post(s) from this thread on one page

Chief Delphi (http://www.chiefdelphi.com/forums/index.php)

- General Forum (http://www.chiefdelphi.com/forums/forumdisplay.php?f=16)

- - New Products for 2016: Speculation, Wants (http://www.chiefdelphi.com/forums/showthread.php?t=138873)

R.C.	05-11-2015 23:12

Re: New Products for 2016: Speculation, Wants

Quote:

Originally Posted by jman4747 (Post 1503587)

Looks real to me.

I would argue that we are in the real world and that our application has parameters that support the common use of 7075 anodized hex shaft. I believe the best practice not to make a blanket statement about material usage and instead to state it's usefulness in terms of our application.

Saying round shaft is always inferior isn't true. Even in FRC there are times when we may be better served with round shaft. I would never tell my students to always use hex or round shaft or aluminum or steel. I train them to pick the best thing for that application. If we have sponsor that will buy half a robots worth of hardware from mcmaster and machine shop that doesn't have hex broaches then round shaft might be a better choice that time around.

Oh and...

4. round shaft couplings and collars are easier to produce (again depending on required tolerances/features)

Your not really at at a real world job. Your in a HS competition where the best choice is clearly ThunderHex or Hex Shafting for most applications if not close to all.

While I agree on the blanket statement, the round shafting is clearly the 1%/minority here. Round shafting + key ways are a major pain and I can't think of a situation where in FRC I'd really want to use round. Most likely if we come to a situation where do we want to use Key'd shafting we'd probably redesign or re evaluate our design.

page2067

05-11-2015 23:47

Re: New Products for 2016: Speculation, Wants

Why we need this:

A 3/8" hex bore bearing with a 0.875" OD

asid61

05-11-2015 23:58

Re: New Products for 2016: Speculation, Wants

Quote:

Originally Posted by page2067 (Post 1503603)

Why we need this:

A 3/8" hex bore bearing with a 0.875" OD

Because when I'm using 3/8" hex shaft it's very convenient.
Also I forgot to mention: 3/8" hex versahubs and sprockets! Or a 3/8" hex to 1/2" sleeve if that's not possible.

Jared

06-11-2015 00:03

Re: New Products for 2016: Speculation, Wants

Quote:

Originally Posted by Cory (Post 1503582)

We're not in the real world. This discussion is clearly about FRC and there really can be no debate that for FRC hex is a superior product.

I'd take hex over round 99 out of 100 times for transmitting torque, but I don't agree with a blanket statement that says hex is always the way to go, especially considering budget. It's undeniably cheaper to drive a McMaster Carr Sure-Grip wheel with a round shaft than a hex shaft.

Putting a hex in a 1.25" hardened steel worm is impossible for most teams that don't have access to a wire edm. Using a keyed shaft would be a better solution, especially if there isn't room in the worm for a 3/8" hex.

If you have a set of two driven rollers or wheels with a pair of bearings in between, you're forced to use a hex bearing here. The inner race of the hex bearing is much weaker than the inner race of the round bearing and has a sloppy fit. I'm pretty sure 254 solved this problem in the past on their outer wheels by using 1/2" keyed shaft...

MichaelBick

06-11-2015 00:05

Re: New Products for 2016: Speculation, Wants

Quote:

Originally Posted by Jared (Post 1503605)

If you have a set of two driven rollers or wheels with a pair of bearings in between, you're forced to use a hex bearing here. The inner race of the hex bearing is much weaker than the inner race of the round bearing and has a sloppy fit. I'm pretty sure 254 solved this problem in the past on their outer wheels by using 1/2" keyed shaft...

No, they used 7/16" hex at the wheels.

R.C.	06-11-2015 01:20

Re: New Products for 2016: Speculation, Wants

Quote:

Originally Posted by asid61 (Post 1503604)

Because when I'm using 3/8" hex shaft it's very convenient.
Also I forgot to mention: 3/8" hex versahubs and sprockets! Or a 3/8" hex to 1/2" sleeve if that's not possible.

That bearing combo is likely too small to hex. I believe AM used to sell that bearing and it would "blow up". It's also probably the reason why it exists with a 1.125 od and not a .875 od.

rfolea

06-11-2015 06:30

Re: New Products for 2016: Speculation, Wants

Quote:

Originally Posted by Knufire (Post 1502738)

SDP-SI should have any GT2 belt you could possibly need.

FYI: Automation Direct now offers belts and pulleys. You won't have any "out of stock" issues there and 2-day shipping is free for orders over $49.

Belts and pulleys

tim-tim

06-11-2015 09:37

Re: New Products for 2016: Speculation, Wants

Quote:

Originally Posted by rfolea (Post 1503617)

FYI: Automation Direct now offers belts and pulleys. You won't have any "out of stock" issues there and 2-day shipping is free for orders over $49.

Belts and pulleys

I only see "L" and "XL" belts and pulleys. No mention of GT2, GT3, or HTD.

M. Mellott

06-11-2015 12:51

Re: New Products for 2016: Speculation, Wants

Quote:

Originally Posted by Mike Marandola (Post 1503454)

If they are the same wheels that they had at IRI, they are pretty neat. There are two new compounds, a "one match" and "one event" wheel. Unfortunately, I forgot the exact durometers. The "one match" wheel was very soft and grippy so I would imagine it would be great for non-drive uses.

I saw those too--very nice wheels, and they had the same tread as their HiGrip wheels but with softer materials as you mentioned (blue and black compounds IIRC). However, I was thinking of uses in FTC as opposed to FRC, where the HiGrip wheel is illegal, or where damage to game pieces are a concern...hence, my personal want for "grippy" wheels with less aggressive tread (or no tread).

Andrew Schreiber

13-11-2015 11:41

Re: New Products for 2016: Speculation, Wants

I'm not gonna comment on pros/cons of hex...

But banebots seems to have relaunched their website with some new products including colson hubs with both 3/8 and 1/2 keyed shafts. (http://www.banebots.com/category/COLSON_HUBS.html)

They will even install them if you order the wheels that way. Pricing isn't bad. No comments on availability or quality though, haven't ordered any yet.

Oblarg

13-11-2015 17:16

Re: New Products for 2016: Speculation, Wants

Quote:

Originally Posted by Andrew Schreiber (Post 1505009)

That clamp hub is glorious, and reasonably priced.

We need more of that.

mrnoble

14-11-2015 21:10

Re: New Products for 2016: Speculation, Wants

Quote:

Originally Posted by Oblarg (Post 1505083)

That clamp hub is glorious, and reasonably priced.

We need more of that.

Two years ago I went to visit the BaneBots facility and drove back to my team with those exact hubs and wheels. They were amazingly good, we used the same set of 1 1/2" X 4" wheels with the 3/8" hubs throughout the 2014 season with ZERO problems. If you want to use Colsons, but don't want the hex axle for some reason, these are probably the best way to go.

All times are GMT -5. The time now is 08:45.

Page 2 of 2

Show 100 post(s) from this thread on one page