Jump to content




Photo

Inline gear mesh


  • Please log in to reply
8 replies to this topic

#1 Benno - SAC

Benno - SAC

    Beyond the Atlantic

  • Full Member
  • PipPipPip
  • 147 posts
  • Joined: 25-January 17
  • Gender:Male
  • Location:Germany

Posted 23 November 2017 - 06:26 AM

In the Hawk 7 motor thread I read following interesting quote by Jersey John:

 

Rule of thumb for best performance:

Hypoid bracket (motor is flush to chassis bottom), use angled pinion only.
Non-hypoid bracket (rear of motor angled up), use a straight pinion.

 

I don't have much experience with inlines and never heard of this. Can someone explain to me why?


Schöne Grüße (Kind regards)

Benno Stolberg

 

www.SAC-Stolberg.de





#2 Cap Henry

Cap Henry

    CHR Cars

  • Subscriber
  • PipPipPipPipPipPipPip
  • 2,702 posts
  • Joined: 25-October 08
  • Gender:Male
  • Location:Bellevue, OH

Posted 23 November 2017 - 07:11 AM

You can use either style pinion for either application with no issue.
  • tonyp likes this

Team PSC
Parma PSE
CHR Cars
JDR-Joe Dirt Racing


#3 Jaeger Team

Jaeger Team

    Mid-Pack Racer

  • Subscriber
  • PipPipPip
  • 109 posts
  • Joined: 27-January 17
  • Gender:Male
  • Location:Palermo, Italy

Posted 23 November 2017 - 09:19 AM

no issue or best performance ?


Maurizio Salerno

#4 Alan Dodson

Alan Dodson

    Rookie Keyboard Racer

  • Full Member
  • Pip
  • 32 posts
  • Joined: 10-January 16
  • Gender:Male
  • Location:Wichita, KS

Posted 23 November 2017 - 10:43 AM

Cap is right, but in the hypoid configuration I think the angled pinion breaks in quicker. Just my opinion, no hard facts. All full size cars use angled pinions mostly because they are much quieter. With plastic crown gears noise is not usually a problem. The ARP angled pinion is a quality piece that I have never had a problem with, so I just stick with them.

 

Happy Thanksgiving to all! BTW, this forum is one of the things I am thankful for!


  • Samiam and elvis44102 like this

#5 JerseyJohn

JerseyJohn

    Posting Leader

  • Full Member
  • PipPipPipPipPipPipPip
  • 3,900 posts
  • Joined: 05-September 07
  • Gender:Male
  • Location:Northern NJ

Posted 23 November 2017 - 06:06 PM

I disagree. .there is a difference in efficiency and friction.

 How much? well in retro east where position is determined by hundredths or thousandths It all matters .

Sure you can use a straight pinion on a hypoid set up , but friction will be increased on the crown gears exit. 

In the hypoid st up any given pinion load is distributed over several teeth, resulting in less wear, also the motor, being lower also lowers the center of gravity.

However HYpoid gears  have a  greater degree of sliding friction between the meshing teeth and by there nature produce increased side thrust along the axle'.

Straight gears in a non hypoid arrangement has advantages of reduced side thrust, single point gear contact and less friction. 

 

​So i stand by my statement for best performance  and gear mesh use a straight pinion in non hypoid brackets and angled  pinions for hypoid. 

 

 

hypoid-gear.jpg

 

JJ


  • DOCinCocoa and Benno - SAC like this
JJ TRADE MARK BANNER copy.jpg

John Chas Molnar

"Certified Newark Wise Guy since 1984" (retired)
"Certified Tony P Chassis God since 2007"
" Internationally Know Slot Car Racing Celebrity "
https://www.facebook...nchassisworks/#
Email me
 


#6 Eddie Fleming

Eddie Fleming

    Checkered Flag in Hand

  • Full Member
  • PipPipPipPipPipPip
  • 1,071 posts
  • Joined: 27-April 14
  • Gender:Male
  • Location:Fayetteville, GA

Posted 23 November 2017 - 08:06 PM

As I see it John

 

The Hypoid setup you are talking about and in your illustration are not quite the same as the slot car setup. The picture with the spiral cut gears is as used in an automobile. the gears in a slotcar are not spiral cut. The slotcar pinion is just a straight pinion with a little taper to the diameter, and we use the same straight cut crown in ether application. In a slot car hypoid situation the teeth of the gears are never in true proper alignment and depend on the lash or wearing in to mesh smoothly. The angled gear is slightly more tolerant of this misalignment and tends to produce a quieter running car.

 

The angled pinion is just a fancy straight cut gear and tends to work well in inline cars of all type.


  • Tim Neja and Benno - SAC like this
Eddie Fleming

#7 Don Weaver

Don Weaver

    Checkered Flag in Hand

  • Subscriber
  • PipPipPipPipPipPip
  • 1,320 posts
  • Joined: 26-October 07
  • Gender:Male
  • Location:Lexington. SC

Posted 23 November 2017 - 08:37 PM

John,

 

Completely agree with your statements.  Angled is best with hypoids.  

 

Don


  • Ramcatlarry and JerseyJohn like this

Don Weaver

​A slot car racer who never grew up!

 

The supply of government exceeds demand.
L.H. Lapham
 
If the brain-eating amoeba invades Washington
it will starve to death...


#8 Ramcatlarry

Ramcatlarry

    Posting Leader

  • Subscriber
  • PipPipPipPipPipPipPip
  • 2,079 posts
  • Joined: 08-March 06
  • Gender:Male
  • Location:St Charles, IL 60174

Posted 23 November 2017 - 11:05 PM

Noise IS friction.  Angled pinions will have a lower contact patch until the gear is fully seated.  Hypoids can be heated with a lighter and the motor running at low RPM to alter the tooth form to the undercut shape with nylon gears like Parma.


  • Tim Neja, JerseyJohn and Benno - SAC like this

Larry D. Kelley, MA
retired raceway owner... (for now)
race directing around Chicago-land

USRA 2017 member #404
USSCA  member

Host 2006 ISRA/USA
Great Lakes Slot Car Club member
60+ year pin Racing rail/slot cars in America


#9 Benno - SAC

Benno - SAC

    Beyond the Atlantic

  • Full Member
  • PipPipPip
  • 147 posts
  • Joined: 25-January 17
  • Gender:Male
  • Location:Germany

Posted 24 November 2017 - 12:15 AM

Thank you guys!

Schöne Grüße (Kind regards)

Benno Stolberg

 

www.SAC-Stolberg.de






Electric Dreams Online Shop