VintageBigBlue.org

 

Re: Pitch of motor pinion


Feb 15 11:21 AM

 


----------------------------

#41715 Feb 15 11:21 AM

Anybody know what the pitch is of the standard motors on the G11? Is it

the same as the one that ships with the Mclennan gearbox?



I'm wanting to use my old Losmandy gearbox for another project, but

need a pinion gear that will fit it.



Mark J



----------------------------

#41716 Feb 15 11:36 AM

Mark, the pitch seems the same but the number of teeth is different of

course.

Floyd

--- In Losmandy_users@yahoogroups.com, "Mark Jones"

yahoogroups01@...> wrote: >

> Anybody know what the pitch is of the standard motors on the G11? Is it

> the same as the one that ships with the Mclennan gearbox?

>

> I'm wanting to use my old Losmandy gearbox for another project, but

> need a pinion gear that will fit it.

>

> Mark J

>



----------------------------

#41717 Feb 15 12:08 PM

Sounds like F# to me. [:D] I just couldn't resist.



Seriousy - I just tried something to cut down on that annoying sound

these things make. I made a gasket out of about 1/16th inch (1.59mm)

rubber material. Cut holes for the pinion and notches for the

attaching screws, trimmed the excess to the shape of the motor housing -

looks pretty good. Anyway, now the drives just hum along (slight

whining, but we're accustomed to that on this group) but not that

rattling, metallic sound. Works great. It shifts the shaft out from the

gearbox a little but the pinion gear was riding right on the inside edge

anyway.



In fact, not sure why we had to cut away the small nibbles on the motor

housing. Someone should try leaving them on. That would also prevent

the 2 attaching screws on the motor from coming into contact with the

gearbox.



Regards,



Bill in Gold Canyon, AZ

USA



--- In Losmandy_users@yahoogroups.com, "Mark Jones" yahoogroups01@...>

wrote: >

> Anybody know what the pitch is of the standard motors on the G11? Is

it > the same as the one that ships with the Mclennan gearbox?

>

> I'm wanting to use my old Losmandy gearbox for another project, but

> need a pinion gear that will fit it.

>

> Mark J

>









[Non-text portions of this message have been removed]



----------------------------

#41720 Feb 15 1:32 PM

Hi,

The plastic bumps caused the motor to tilt when you tightened the

screws. The rubber gasket sounds like a good idea, should isolate the two.

Floyd

--- In Losmandy_users@yahoogroups.com, "William J. Shaheen"

wjshaheen@...> wrote: >

>

> Sounds like F# to me. [:D] I just couldn't resist.

>

> Seriousy - I just tried something to cut down on that annoying sound

> these things make. I made a gasket out of about 1/16th inch (1.59mm)

> rubber material. Cut holes for the pinion and notches for the

> attaching screws, trimmed the excess to the shape of the motor housing -

> looks pretty good. Anyway, now the drives just hum along (slight

> whining, but we're accustomed to that on this group) but not that

> rattling, metallic sound. Works great. It shifts the shaft out from the

> gearbox a little but the pinion gear was riding right on the inside edge

> anyway.

>

> In fact, not sure why we had to cut away the small nibbles on the motor

> housing. Someone should try leaving them on. That would also prevent

> the 2 attaching screws on the motor from coming into contact with the

> gearbox.

>

> Regards,

>

> Bill in Gold Canyon, AZ

> USA

>

> --- In Losmandy_users@yahoogroups.com, "Mark Jones" yahoogroups01@>

> wrote:

> >

> > Anybody know what the pitch is of the standard motors on the G11? Is

> it

> > the same as the one that ships with the Mclennan gearbox?

> >

> > I'm wanting to use my old Losmandy gearbox for another project, but

> > need a pinion gear that will fit it.

> >

> > Mark J

> >

>

>

>

>

> [Non-text portions of this message have been removed]

>



----------------------------

#41721 Feb 15 1:38 PM

Just make sure when you attach the pinion you allow for the thickness of the gasket when spacing the

pinion.



Don



----------------------------

#41724 Feb 15 2:45 PM

Back to the topic at hand... I estimate the diameter of the stock

pinion to be .25" and it has 18 teeth. So it appears to be a 72p gear

with a 2mm bore. But it could also be metric: 18 teeth and 6mm would be

mod3, right?



??



Mark J



----------------------------

#41725 Feb 15 3:03 PM

Well, Don - that's the ironic part. Without the gasket, the pinion

rides on the 1st gear on it's inside edge. I.e., the pinion is

inserted too far into the gearbox - because the nibs were removed. By

using a thin gasket, the pinion spacing is restored to what it should

be, and what it was before cutting off the nibs.



Bill



--- In Losmandy_users@yahoogroups.com, "Don D'Egidio" djd521@...>

wrote: >

> Just make sure when you attach the pinion you allow for the thickness

of the gasket when spacing the > pinion.

>

> Don

>







----------------------------

#41727 Feb 15 3:15 PM

If you look at the width of the pinion teeth that engage the narrow

gearbox gear that it turns then you will realize that this is not an

issue.



And besides who actually "adjusted" the pinion position upon deciding

to file off the "stock position/depth" nubs in the first place? ;-)

Michael





--- In Losmandy_users@yahoogroups.com, "Don D'Egidio" djd521@...>

wrote: >

> Just make sure when you attach the pinion you allow for the thickness

of the gasket when spacing the > pinion.

>

> Don

>



----------------------------

#41731 Feb 15 5:05 PM

Hi Bill,



I did not cut them of first.,but after a few trials I did cut them off

and I even went one more step ahead and got rid of the plastic washer

which is held by 2 screws and is screwed onto the front of the motor.

Now they run very smooth.



regards Rainer

>

> In fact, not sure why we had to cut away the small nibbles on the motor

> housing. Someone should try leaving them on. That would also prevent

> the 2 attaching screws on the motor from coming into contact with the

> gearbox.

>

> Regards,

>

> Bill in Gold Canyon, AZ

> USA

>



----------------------------

#41742 Feb 16 2:57 AM

Back to the topic at hand... I estimate the diameter of the stock

> pinion to be .25" and it has 18 teeth. So it appears to be a 72p gear

> with a 2mm bore. But it could also be metric: 18 teeth and 6mm would be

> mod3, right?

No.

Mod1

Mod numbers are the length along the Pitch Circle Diameter, per tooth.

6mm diameter. PCD = 6*3.14 = 18.84mm. Guess PCD is actually slightly

less than this, giving 1mm/tooth = Mod1. A common metric pitch.

The main worm wheel driving the scope, is only something like Mod3!...



Best Wishes



----------------------------

#41748 Feb 16 2:40 PM

Thanks for the clarification on the mod spec.



I emailed the folks at Allied to see if they know what the gear is.



Mark J

--- In Losmandy_users@yahoogroups.com, R Hamlett ttelmah@...> wrote:

>

> > Back to the topic at hand... I estimate the diameter of the stock

> > pinion to be .25" and it has 18 teeth. So it appears to be a 72p

gear

> > with a 2mm bore. But it could also be metric: 18 teeth and 6mm

would be

> > mod3, right?

> No.

> Mod1

> Mod numbers are the length along the Pitch Circle Diameter, per

tooth.

> 6mm diameter. PCD = 6*3.14 = 18.84mm. Guess PCD is actually slightly

> less than this, giving 1mm/tooth = Mod1. A common metric pitch.

> The main worm wheel driving the scope, is only something like Mod3!...

>

> Best Wishes

>



----------------------------

#41751 Feb 16 3:59 PM

Hi Mark,

I think your comment is right on the money. The Titan comes with a one

piece worm block and better motors. I think that improving the G-11

with all the upgrades would make it a big consideration over the

Titan. Perhaps a conflict of interest?

Floyd

--- In Losmandy_users@yahoogroups.com, "Mark Jones"

yahoogroups01@...> wrote: >

> Thanks for the clarification on the mod spec.

>

> I emailed the folks at Allied to see if they know what the gear is.

>

> Mark J

>

> --- In Losmandy_users@yahoogroups.com, R Hamlett ttelmah@> wrote:

> >

> > > Back to the topic at hand... I estimate the diameter of the stock

> > > pinion to be .25" and it has 18 teeth. So it appears to be a 72p

> gear

> > > with a 2mm bore. But it could also be metric: 18 teeth and 6mm

> would be

> > > mod3, right?

> > No.

> > Mod1

> > Mod numbers are the length along the Pitch Circle Diameter, per

> tooth.

> > 6mm diameter. PCD = 6*3.14 = 18.84mm. Guess PCD is actually slightly

> > less than this, giving 1mm/tooth = Mod1. A common metric pitch.

> > The main worm wheel driving the scope, is only something like Mod3!...

> >

> > Best Wishes

> >

>



----------------------------

#41754 Feb 16 5:25 PM

Hi,



I see :-)



I do not think so. We are talking of 2 different mounts in a

completely different weight class.



Look at Takahashi. They have a EM200, EM400 and a EM 500 all built

with the same technology.



Why Would I buy a Titan for 120 pounds if I know I will enver reach

that equipment weight and 60 pounds are enough ?



Titan (120lbs) US $ 7,000.00 and improved G11 (60lbs) maybe US $

4,000.00 ? and improved GM-8 (30lbs) US 2,750.00 or something ?



.?



regards Rainer



>

> Hi Mark,

> I think your comment is right on the money. The Titan comes with a one

> piece worm block and better motors. I think that improving the G-11

> with all the upgrades would make it a big consideration over the

> Titan. Perhaps a conflict of interest?

> Floyd

> --- In Losmandy_users@yahoogroups.com, "Mark Jones"

> yahoogroups01@> wrote:

> >

> > Thanks for the clarification on the mod spec.

> >

> > I emailed the folks at Allied to see if they know what the gear is.

> >

> > Mark J

> >

> > --- In Losmandy_users@yahoogroups.com, R Hamlett ttelmah@> wrote:

> > >

> > > > Back to the topic at hand... I estimate the diameter of the stock

> > > > pinion to be .25" and it has 18 teeth. So it appears to be a 72p

> > gear

> > > > with a 2mm bore. But it could also be metric: 18 teeth and 6mm

> > would be

> > > > mod3, right?

> > > No.

> > > Mod1

> > > Mod numbers are the length along the Pitch Circle Diameter, per

> > tooth.

> > > 6mm diameter. PCD = 6*3.14 = 18.84mm. Guess PCD is actually

slightly > > > less than this, giving 1mm/tooth = Mod1. A common metric pitch.

> > > The main worm wheel driving the scope, is only something like

Mod3!... > > >

> > > Best Wishes

> > >

> >

>







Contact Us
This Site's Privacy Policy
Google's privacy policies

S
e
n
i
o
r
T
u
b
e
.
o
r
g