RCCrawler Forums

JasonInAugusta · 04-24-2005, 08:12 AM

I got so pissed at myself last night...

Ordered up some 1/2" Delrin to make a set of transmission/motor plates with. With my limited tooling and skills, I decided to cut all the holes and bearing pockets on the rotary table. Talked with Bill (RCAlloys) and he said he usually grinds down a 1/2" endmill to the diameter he needs. He'd never though about going at bearing pockets like this and was interested in my rotary table idea.

Remember, I'm using manual equipment.

Worked well. I nailed the .190" pocket depth, but I went brain dead and cut the pocket .003" too large in diameter. :-x

So I get to start over and crank handles again today.

Ace · 04-24-2005, 03:50 PM

Man Jason, sounds like you need a boring head...

Your using the rotary table to open up bearing press holes??? Or are you using it to layout a radial hole pattern?

BENDER · 04-24-2005, 04:48 PM

Quote:

Originally Posted by Ace

Man Jason, sounds like you need a boring head...

Your using the rotary table to open up bearing press holes??? Or are you using it to layout a radial hole pattern?

That's what I'm wondering. Did you grind an endmill down to match the O.D. of the bearing for a light press fit, or are you using the rotary table with an undersized endmill? Plunging it with an endmill works as long as you pilot drill the hole undersized first close to the finish diameter. Another thing to watch for is runout in the tool.

jason · 04-24-2005, 04:52 PM

Alright you guys got it, and Bender since you've been doing such a good job, you're the mod of this section

BENDER · 04-24-2005, 04:56 PM

Quote:

Originally Posted by jason

Alright you guys got it, and Bender since you've been doing such a good job, you're the mod of this section

Cool, thanks!!

JasonInAugusta · 04-24-2005, 07:36 PM

Quote:

Originally Posted by BENDER

That's what I'm wondering. Did you grind an endmill down to match the O.D. of the bearing for a light press fit, or are you using the rotary table with an undersized endmill? Plunging it with an endmill works as long as you pilot drill the hole undersized first close to the finish diameter. Another thing to watch for is runout in the tool.

Undersized endmill and rotary table.

It worked, though.

BENDER · 04-24-2005, 07:46 PM

I see, I was thinking a smaller diameter bore. Looks nice.

JasonInAugusta · 04-24-2005, 07:48 PM

Well, I did have a smaller one to cut for the bearing pocket, wasn't too bad though.

BlueMonster · 04-24-2005, 07:49 PM

What kind of material is that you used? Some kind of plastic, it looks like.

JasonInAugusta · 04-24-2005, 08:05 PM

That's 1/2" Delrin.

WRMorrison · 04-24-2005, 08:09 PM

Where did you find a table that small? It seems to be the perfect size for rc stuff.

Ace · 04-24-2005, 08:10 PM

Jason You making a 2 speed trans?

That's a Sherline table. About 4" dia.

JasonInAugusta · 04-24-2005, 08:20 PM

Yeah, that's a lil' Sherline rotary table came with the Sherline 4000 lathe and vertical milling column I picked up a couple of years ago.

Ace, the 2-speed is for an idea I've had in my head for a year now. Finally getting started on it.

Ace · 04-24-2005, 08:37 PM

Sweet. Looks like a fast motor? (not for a crawler?)

I'd love to have 2-speed gearbox's in my clod. Have low for crawling, 2nd for wheelspeed.

JasonInAugusta · 04-24-2005, 08:50 PM

Crap.

Thought I replied to this...must've clicked "Go Advanced" instead.

The motor is a 7 turn Hacker Brushless. The 2-speed is from OFNA and intended for use in the Monster Pirate or Dominator.

BultacoJim · 04-24-2005, 10:35 PM

Quote:

Originally Posted by Ace

I'd love to have 2-speed gearbox's in my clod. Have low for crawling, 2nd for wheelspeed.

You mean one of these 2-speed transmissions?

BENDER · 04-24-2005, 10:42 PM

Wow, very nice BultacoJim!! Is that your creation? Is it manually operated?

WRMorrison · 04-24-2005, 10:46 PM

Un-frickin'-believable! You don't by chance have time for an understudy?!

BlueMonster · 04-24-2005, 10:50 PM

You guys aren't making me waiting to get my mill and lathe any easier!

BENDER · 04-24-2005, 11:03 PM

Quote:

Originally Posted by BlueMonster

You guys aren't making me waiting to get my mill and lathe any easier!

It'll be worth the wait!!

04-24-2005, 08:12 AM	#1
JasonInAugusta 06 Super National Champ Join Date: Jun 2004 Location: Stark Industries Bar and Grill Posts: 11,361	I got so pissed at myself last night... Ordered up some 1/2" Delrin to make a set of transmission/motor plates with. With my limited tooling and skills, I decided to cut all the holes and bearing pockets on the rotary table. Talked with Bill (RCAlloys) and he said he usually grinds down a 1/2" endmill to the diameter he needs. He'd never though about going at bearing pockets like this and was interested in my rotary table idea. Remember, I'm using manual equipment. Worked well. I nailed the .190" pocket depth, but I went brain dead and cut the pocket .003" too large in diameter. :-x So I get to start over and crank handles again today.

04-24-2005, 03:50 PM	#2
Ace Rock Crawler Join Date: Apr 2004 Location: Longmont, CO Posts: 901	Man Jason, sounds like you need a boring head... Your using the rotary table to open up bearing press holes??? Or are you using it to layout a radial hole pattern?

04-24-2005, 04:52 PM	#4
jason R.I.P. Chip Join Date: Jan 2004 Location: The Crawler State Posts: 13,938	Alright you guys got it, and Bender since you've been doing such a good job, you're the mod of this section

04-24-2005, 07:46 PM	#7
BENDER 2006 2.2 National Champ Join Date: Dec 2004 Location: Big Bear Lake Posts: 8,328	I see, I was thinking a smaller diameter bore. Looks nice.

04-24-2005, 07:48 PM	#8
JasonInAugusta 06 Super National Champ Join Date: Jun 2004 Location: Stark Industries Bar and Grill Posts: 11,361	Well, I did have a smaller one to cut for the bearing pocket, wasn't too bad though.

04-24-2005, 07:49 PM	#9
BlueMonster RCC Addict Join Date: Apr 2005 Location: Seattle Posts: 1,437	What kind of material is that you used? Some kind of plastic, it looks like.

04-24-2005, 08:05 PM	#10
JasonInAugusta 06 Super National Champ Join Date: Jun 2004 Location: Stark Industries Bar and Grill Posts: 11,361	That's 1/2" Delrin.

04-24-2005, 08:09 PM	#11
WRMorrison Rock Crawler Join Date: Dec 2004 Location: Land of the Free, because of the Brave Posts: 891	Where did you find a table that small? It seems to be the perfect size for rc stuff.

04-24-2005, 08:10 PM	#12
Ace Rock Crawler Join Date: Apr 2004 Location: Longmont, CO Posts: 901	Jason You making a 2 speed trans? That's a Sherline table. About 4" dia.

04-24-2005, 08:20 PM	#13
JasonInAugusta 06 Super National Champ Join Date: Jun 2004 Location: Stark Industries Bar and Grill Posts: 11,361	Yeah, that's a lil' Sherline rotary table came with the Sherline 4000 lathe and vertical milling column I picked up a couple of years ago. Ace, the 2-speed is for an idea I've had in my head for a year now. Finally getting started on it.

Sponsored Links

04-24-2005, 08:37 PM	#14
Ace Rock Crawler Join Date: Apr 2004 Location: Longmont, CO Posts: 901	Sweet. Looks like a fast motor? (not for a crawler?) I'd love to have 2-speed gearbox's in my clod. Have low for crawling, 2nd for wheelspeed.

04-24-2005, 08:50 PM	#15
JasonInAugusta 06 Super National Champ Join Date: Jun 2004 Location: Stark Industries Bar and Grill Posts: 11,361	Crap. Thought I replied to this...must've clicked "Go Advanced" instead. The motor is a 7 turn Hacker Brushless. The 2-speed is from OFNA and intended for use in the Monster Pirate or Dominator.

04-24-2005, 10:42 PM	#17
BENDER 2006 2.2 National Champ Join Date: Dec 2004 Location: Big Bear Lake Posts: 8,328	Wow, very nice BultacoJim!! Is that your creation? Is it manually operated?

04-24-2005, 10:46 PM	#18
WRMorrison Rock Crawler Join Date: Dec 2004 Location: Land of the Free, because of the Brave Posts: 891	Un-frickin'-believable! You don't by chance have time for an understudy?!

04-24-2005, 10:50 PM	#19
BlueMonster RCC Addict Join Date: Apr 2005 Location: Seattle Posts: 1,437	You guys aren't making me waiting to get my mill and lathe any easier!

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