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Windmanquebec · 06-14-2014, 07:38 PM

Hi guy.
I bought an old, I think first gen Trex 500 with Fiberglass body. I am in the process of rebuiding it and I have laying around a set of Trex Pro bearing block in aluminium. I want to replace the original plastic block of my old model with those.I made a spacer on each side of the block to fill the space of the larger frame vs the pro frame (about 0.145" total ie 0.0725" each side).

Do you see any problem I could have doing so?

Here is a picture of one side I did, ( I know the block is actually on the wrong side, just trial fit)

Gladius · 06-15-2014, 01:22 AM

What did you do about the tab that normally fits into the slot in the frame? That's the only issue that I can think off, that the bearing block could move, but I think that's a pretty small risk, so go for it!

Steve Evans · 06-15-2014, 02:50 AM

Use an ESP bearing block.

Steve

Windmanquebec · 06-15-2014, 06:38 AM

Quote:

Originally Posted by Gladius

What did you do about the tab that normally fits into the slot in the frame? That's the only issue that I can think off, that the bearing block could move, but I think that's a pretty small risk, so go for it!

Well on the pro frame there is no tab...so...

Blayd · 06-15-2014, 07:01 AM

Only issue I thought of was, the blocks need to be spaced almost exactly the same on each side, of each block. If one of the spacers is just a hair thicker then another, this will throw the min shaft alignment out, even by a hair, will cause issues, and probably fast bearing wear as well. If you have 4 spacers, say two are just very slightly thicker or thinner, and you install one on one side of a block, and another on the other side of the other block, you could have some minor alignment issues.
Probably not an issue, the bearings have slight clearance tolerances...but if you wind up with a vibe issue, you know where to start looking.

Then again, doesnt the Pro use a different main shaft ( Longer? ) with a fixed collar and shims?
I'm not sure on this but the bearing blocks may be different in profile for use with the fixed collar and shims, where as the ESP uses a main shaft with a sliding locking collar? So using the Pro blocks with an ESP main shaft might be an issue? Let me know.. I'm curious.
I run an ESP with a Pro head ( flybarred ) but use an ESP mainshaft and i2 ESP bearing blocks. Which head didnt matter, as long as I use the ESP blocks and shafts.

Keep us updated.

Windmanquebec · 06-15-2014, 07:25 AM

Quote:

Originally Posted by Steve Evans

Use an ESP bearing block.

Steve

I know that could fit, but I already have some pro brg block that are available

Windmanquebec · 06-15-2014, 12:58 PM

Quote:

Originally Posted by Blayd

Then again, doesnt the Pro use a different main shaft ( Longer? ) with a fixed collar and shims?
I'm not sure on this but the bearing blocks may be different in profile for use with the fixed collar and shims, where as the ESP uses a main shaft with a sliding locking collar? So using the Pro blocks with an ESP main shaft might be an issue? Let me know.. I'm curious.
I run an ESP with a Pro head ( flybarred ) but use an ESP mainshaft and i2 ESP bearing blocks. Which head didnt matter, as long as I use the ESP blocks and shafts.

Keep us updated.

Ya I'll check on that one

Windmanquebec · 06-15-2014, 03:58 PM

I measure both standard bloc and pro block for bearing height. The pro block bearing seats 0.025" lower. So that mean, since the main gear is the one who set the shaft height because it is seating against the bottom of the lower bearing, that all the head assembly is going to be 0.025" lower. The only thing I see is that the main gear will have an ofset of 0.025" whit the front tail gear. On the motor side I can adjust the pinion height on the motor shaft.

Do you think that 0.025" misalignment in height can do something bad for the tail gear?

Windmanquebec · 06-15-2014, 10:51 PM

Ok I did a dummy build. I'm using a ESP main shaft with collar. There is a slight offset from auto-rotation gear and tail gear. The auto-rotation gear is about 0.010" to 0.015" higher than the tail gear. I dough that will be a problem.

So here's the ESP shaft with collar and my spacers for the top and bottom bearing block.

And the offset of about 0.010" to 0.015" on the auto-rotation/tail gears.On my 500 Pro DFC the top of the 2 gears are inline

Gladius · 06-16-2014, 12:54 AM

I'm using the EFL shaft on my ESP, which is a little shorter than the standard ESP shaft.

You shouldn't have any issue with the gear alignment you just posted.

06-14-2014, 07:38 PM	#1 (permalink)
Windmanquebec Registered Users My HF Map location Join Date: Jan 2012	Pro brg block on large Trex body (Old) Hi guy. I bought an old, I think first gen Trex 500 with Fiberglass body. I am in the process of rebuiding it and I have laying around a set of Trex Pro bearing block in aluminium. I want to replace the original plastic block of my old model with those.I made a spacer on each side of the block to fill the space of the larger frame vs the pro frame (about 0.145" total ie 0.0725" each side). Do you see any problem I could have doing so? Here is a picture of one side I did, ( I know the block is actually on the wrong side, just trial fit) Attached Thumbnails __________________ SYMA S-107/BLADE (2)450 3D FBL/ALIGN(3)T-REX 500 (2)T-REX 550 T-REX 700L V2/DX8 SCALE MD500(450) UH-60/AS350/BO105(500) A109(600)

06-15-2014, 01:22 AM	#2 (permalink)
Gladius Registered Users Join Date: Nov 2012 Location: Maryland	What did you do about the tab that normally fits into the slot in the frame? That's the only issue that I can think off, that the bearing block could move, but I think that's a pretty small risk, so go for it! __________________ <> Trex 600 ESP FBL, Trex 500 ESP FBL, Gaui X3, Oxy 3 <> <> Builds in progress: Logo 600SX, Synergy 516 <> *Spartan Vortex VX1e*

06-15-2014, 02:50 AM	#3 (permalink)
Steve Evans Registered Users Join Date: May 2007	Use an ESP bearing block. Steve __________________ Trex 450SEv2/HS65-MGs cyclic/Spartan Quark/DS520 tail Trex 450ProV2 DFC/CGY750 FBL/DS410s cyclic/DS520 tail Trex 500ESP DFC/CGY750 FBL/YGE-120LV ESC/DS510s cyclic/DS650 tail Blackout 330/OpenPilot Revo with FatShark 600mW VTX, Futaba 8FG 2.4GHz

06-15-2014, 07:01 AM	#5 (permalink)
Blayd Registered Users My HF Map location Join Date: Jan 2011	Only issue I thought of was, the blocks need to be spaced almost exactly the same on each side, of each block. If one of the spacers is just a hair thicker then another, this will throw the min shaft alignment out, even by a hair, will cause issues, and probably fast bearing wear as well. If you have 4 spacers, say two are just very slightly thicker or thinner, and you install one on one side of a block, and another on the other side of the other block, you could have some minor alignment issues. Probably not an issue, the bearings have slight clearance tolerances...but if you wind up with a vibe issue, you know where to start looking. Then again, doesnt the Pro use a different main shaft ( Longer? ) with a fixed collar and shims? I'm not sure on this but the bearing blocks may be different in profile for use with the fixed collar and shims, where as the ESP uses a main shaft with a sliding locking collar? So using the Pro blocks with an ESP main shaft might be an issue? Let me know.. I'm curious. I run an ESP with a Pro head ( flybarred ) but use an ESP mainshaft and i2 ESP bearing blocks. Which head didnt matter, as long as I use the ESP blocks and shafts. Keep us updated. __________________ Trex700N2E Trex500ESPTT(PRO head and Tail ) *Trex500ESP (Belted)* *HC500SE ....GO TEAM FLYBAR!*

06-15-2014, 03:58 PM	#8 (permalink)
Windmanquebec Registered Users Thread Starter My HF Map location Join Date: Jan 2012	I measure both standard bloc and pro block for bearing height. The pro block bearing seats 0.025" lower. So that mean, since the main gear is the one who set the shaft height because it is seating against the bottom of the lower bearing, that all the head assembly is going to be 0.025" lower. The only thing I see is that the main gear will have an ofset of 0.025" whit the front tail gear. On the motor side I can adjust the pinion height on the motor shaft. Do you think that 0.025" misalignment in height can do something bad for the tail gear? __________________ SYMA S-107/BLADE (2)450 3D FBL/ALIGN(3)T-REX 500 (2)T-REX 550 T-REX 700L V2/DX8 SCALE MD500(450) UH-60/AS350/BO105(500) A109(600)

06-15-2014, 10:51 PM	#9 (permalink)
Windmanquebec Registered Users Thread Starter My HF Map location Join Date: Jan 2012	Ok I did a dummy build. I'm using a ESP main shaft with collar. There is a slight offset from auto-rotation gear and tail gear. The auto-rotation gear is about 0.010" to 0.015" higher than the tail gear. I dough that will be a problem. So here's the ESP shaft with collar and my spacers for the top and bottom bearing block. And the offset of about 0.010" to 0.015" on the auto-rotation/tail gears.On my 500 Pro DFC the top of the 2 gears are inline Attached Thumbnails __________________ SYMA S-107/BLADE (2)450 3D FBL/ALIGN(3)T-REX 500 (2)T-REX 550 T-REX 700L V2/DX8 SCALE MD500(450) UH-60/AS350/BO105(500) A109(600)

06-16-2014, 12:54 AM	#10 (permalink)
Gladius Registered Users Join Date: Nov 2012 Location: Maryland	I'm using the EFL shaft on my ESP, which is a little shorter than the standard ESP shaft. You shouldn't have any issue with the gear alignment you just posted. __________________ <> Trex 600 ESP FBL, Trex 500 ESP FBL, Gaui X3, Oxy 3 <> <> Builds in progress: Logo 600SX, Synergy 516 <> *Spartan Vortex VX1e*

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