Removing pinion gears from old NEMA 17 motors - NYCResistor:Microcontrollers

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Message from discussion Removing pinion gears from old NEMA 17 motors
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Date: Thu, 15 Mar 2012 17:13:33 -0700 (PDT)
From: Rob Graham <rgraham...@yahoo.com>
Reply-To: Rob Graham <rgraham...@yahoo.com>
Subject: Re: [NYCR:Microcontrollers] Removing pinion gears from old NEMA 17 motors
To: "nycresistormicrocontrollers@googlegroups.com" <nycresistormicrocontrollers@googlegroups.com>
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Automotive parts shops sell or rent a tool call a gear puller.=A0 It hooks =
underneath the edge of a gear and then pushes a pin though the middle.=A0 I=
t's used to pull pinion gears off of shafts in differentials.=0A=0A$5 on Go=
ogle, but the 3 tooth ones work better, they don't slip off as easily.=0A=
=0A=0Ahttp://www.google.com/products/catalog?q=3Dgear+puller&oe=3Dutf-8&rls=
=3Dorg.mozilla:en-US:official&client=3Dfirefox-a&um=3D1&ie=3DUTF-8&tbm=3Dsh=
op&cid=3D8009454050924908911&sa=3DX&ei=3DV4ViT5HvIuHL2QXk_fHRCA&ved=3D0CJYB=
EPMCMAE=0A=0A=0A=0A________________________________=0A From: motoki hayashi=
 <ra...@mac.com>=0ATo: nycresistormicrocontrollers@googlegroups.com =0ASent=
: Thursday, March 15, 2012 6:39 PM=0ASubject: Re: [NYCR:Microcontrollers] R=
emoving pinion gears from old NEMA 17 motors=0A =0A=0AThank you all for the=
 tips.=0A=0ASo I am imagining a jig built with two pieces of metal plates s=
crewed on a piece of scrap wood which will then be attached to a table by c=
-clamps.=0A=0AI am still unsure if the pinion would budge though. =A0These =
pinion looks to be heated before it was installed and it's rock solid. =A0I=
 was inclined for a dremel solution, but hammer should be mightier than my =
pinion puller with a 6-inch handle. =A0I will give this a go first.=0A=0ATh=
en again, I don't own a lot of tools (I don't even own a hammer at the mome=
nt), so I will be back out shopping. =A0Depending on what I find at hardwar=
e stores, on-sale Dremel set might be more cost effective and a quicker fix=
 for me. =A0However, the issue with metal shavings does concern me a bit. =
=A0How bad can it be?=0A=0A=0AOn Mar 15, 2012, at 08:34 AM, Dan Lavin <dan.=
l...@verizon.net> wrote:=0A=0A=0AI have done this fairly often using a piece =
of steel L and a pin punch. =0A>=0A>First, cut a notch in the L such that i=
t can slip between the pinion and the motor.=A0 Then suspend the motor from=
 the L by the pinion and use the pin punch to drive out the motor shaft.=A0=
 Do not substitute a center punch for the pin punch.=0A>=0A>This method sav=
es the motor bearings and keeps metal shavings out of the motor.=0A>=0A>On =
3/14/2012 8:31 PM, motoki hayashi wrote:=0A>Hello, Resistors=0A>>=0A>>I hav=
e just purchased a printrbot kit (low cost rep rap that was featured on kic=
kstarter a few month ago).=0A>>My plan is to "pay-as-I-go" without paying e=
xtra, so I settled on a set that includes printed pieces and vitamins (nuts=
, bolts, bearings, but no electronics or hot end). =A0After years of just c=
ontemplating 3D printers, I think it's a good start.=0A>>=0A>>Anyway, I hav=
e just purchased a set of five NEMA motors from a decommissioned CNC machin=
e hoping to get started.=0A>>Problem is, they all came with wrong pinion ge=
ars and they aren't fixed with worm screws. =A0Bargaining wasn't such a gre=
at idea...=0A>>=0A>>My desperate google searches pointed at two tools that =
can remove pinion gears. =A0One is a pinion puller, and other is a nut spli=
tter. =A0Pinion puller seemed more ideal, but hobby grade puller wasn't a m=
atch against those pinions even though it's designed to accommodate the 5mm=
 shaft.=0A>>=0A>>So, I am shopping for a heavy duty nut splitter now, but I=
 wanted to ask you guys if you have similar experience, or have better idea=
s??=0A>>=0A>>Thanks,=0A>>Moto=0A>>-- =0A>>You received this message because=
 you are subscribed to the Google Groups "NYCResistor:Microcontrollers" gro=
up.=0A>>To post to this group, send email to nycresistormicrocontrollers@go=
oglegroups.com.=0A>>To unsubscribe from this group, send email to nycresist=
ormicrocontrollers+unsubscribe@googlegroups.com.=0A>>For more options, visi=
t this group at http://groups.google.com/group/nycresistormicrocontrollers?=
hl=3Den.=0A>>=0A>=0A>-- =0A>You received this message because you are subsc=
ribed to the Google Groups "NYCResistor:Microcontrollers" group.=0A>To post=
 to this group, send email to nycresistormicrocontrollers@googlegroups.com.=
=0A>To unsubscribe from this group, send email to nycresistormicrocontrolle=
rs+unsubscribe@googlegroups.com.=0A>For more options, visit this group at h=
ttp://groups.google.com/group/nycresistormicrocontrollers?hl=3Den.=0A>=0A--=
 =0AYou received this message because you are subscribed to the Google Grou=
ps "NYCResistor:Microcontrollers" group.=0ATo post to this group, send emai=
l to nycresistormicrocontrollers@googlegroups.com.=0ATo unsubscribe from th=
is group, send email to nycresistormicrocontrollers+unsubscribe@googlegroup=
s.com.=0AFor more options, visit this group at http://groups.google.com/gro=
up/nycresistormicrocontrollers?hl=3Den.
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<html><body><div style=3D"color:#000; background-color:#fff; font-family:ti=
mes new roman, new york, times, serif;font-size:12pt"><div><span>Automotive=
 parts shops sell or rent a tool call a gear puller.&nbsp; It hooks underne=
ath the edge of a gear and then pushes a pin though the middle.&nbsp; It's =
used to pull pinion gears off of shafts in differentials.</span></div><div>=
<br><span></span></div><div><span>$5 on Google, but the 3 tooth ones work b=
etter, they don't slip off as easily.<br></span></div><div><br><span></span=
></div><div><span>http://www.google.com/products/catalog?q=3Dgear+puller&am=
p;oe=3Dutf-8&amp;rls=3Dorg.mozilla:en-US:official&amp;client=3Dfirefox-a&am=
p;um=3D1&amp;ie=3DUTF-8&amp;tbm=3Dshop&amp;cid=3D8009454050924908911&amp;sa=
=3DX&amp;ei=3DV4ViT5HvIuHL2QXk_fHRCA&amp;ved=3D0CJYBEPMCMAE<br></span></div=
><div><br></div>  <div style=3D"font-family: times new roman, new york, tim=
es, serif; font-size: 12pt;"> <div style=3D"font-family: times new roman, n=
ew york, times,
 serif; font-size: 12pt;"> <div dir=3D"ltr"> <font face=3D"Arial" size=3D"2=
"> <hr size=3D"1">  <b><span style=3D"font-weight:bold;">From:</span></b> m=
otoki hayashi &lt;ra...@mac.com&gt;<br> <b><span style=3D"font-weight: bold=
;">To:</span></b> nycresistormicrocontrollers@googlegroups.com <br> <b><spa=
n style=3D"font-weight: bold;">Sent:</span></b> Thursday, March 15, 2012 6:=
39 PM<br> <b><span style=3D"font-weight: bold;">Subject:</span></b> Re: [NY=
CR:Microcontrollers] Removing pinion gears from old NEMA 17 motors<br> </fo=
nt> </div> <br><meta http-equiv=3D"x-dns-prefetch-control" content=3D"off">=
<div id=3D"yiv2010866351"><div><div><span class=3D"yiv2010866351Apple-style=
-span" style=3D"font-family:Helvetica, Arial, Verdana, sans-serif;">Thank y=
ou all for the tips.<br><br>So I am imagining a jig built with two pieces o=
f metal plates screwed on a piece of scrap wood which will then be attached=
 to a table by c-clamps.<br><br>I am still unsure if the pinion would budge=
 though.
 &nbsp;These pinion looks to be heated before it was installed and it's roc=
k solid. &nbsp;I was inclined for a dremel solution, but hammer should be m=
ightier than my pinion puller with a 6-inch handle. &nbsp;I will give this =
a go first.<br><br>Then again, I don't own a lot of tools (I don't even own=
 a hammer at the moment), so I will be back out shopping. &nbsp;Depending o=
n what I find at hardware stores, on-sale Dremel set might be more cost eff=
ective and a quicker fix for me. &nbsp;However, the issue with metal shavin=
gs does concern me a bit. &nbsp;How bad can it be?</span></div><div><font c=
lass=3D"yiv2010866351Apple-style-span" face=3D"Helvetica, Arial, Verdana, s=
ans-serif"><br></font><br>On Mar 15, 2012, at 08:34 AM, Dan Lavin &lt;dan.l=
l...@verizon.net&gt; wrote:<br><br></div><div><blockquote type=3D"cite"><div c=
lass=3D"yiv2010866351msg-quote">I have done this fairly often using a piece=
 of steel L and a pin punch. <br> <br> First, cut a notch in the L such tha=
t
 it can slip between the pinion and the motor.&nbsp; Then suspend the motor=
 from the L by the pinion and use the pin punch to drive out the motor shaf=
t.&nbsp; Do not substitute a center punch for the pin punch.<br> <br> This =
method saves the motor bearings and keeps metal shavings out of the motor.<=
br> <br>On 3/14/2012 8:31 PM, motoki hayashi wrote:<blockquote type=3D"cite=
"><div><span class=3D"yiv2010866351Apple-style-span" style=3D"font-family:H=
elvetica, Arial, Verdana, sans-serif;">Hello, Resistors<br> <br> I have jus=
t purchased a printrbot kit (low cost rep rap that was featured on kickstar=
ter a few month ago).<br> My plan is to "pay-as-I-go" without paying extra,=
 so I settled on a set that includes printed pieces and vitamins (nuts, bol=
ts, bearings, but no electronics or hot end). &nbsp;After years of just con=
templating 3D printers, I think it's a good start.<br> <br> Anyway, I have =
just purchased a set of five NEMA motors from a decommissioned CNC machine
 hoping to get started.<br> Problem is, they all came with wrong pinion gea=
rs and they aren't fixed with worm screws. &nbsp;Bargaining wasn't such a g=
reat idea...<br> <br> My desperate google searches pointed at two tools tha=
t can remove pinion gears. &nbsp;One is a pinion puller, and other is a nut=
 splitter. &nbsp;Pinion puller seemed more ideal, but hobby grade puller wa=
sn't a match against those pinions even though it's designed to accommodate=
 the 5mm shaft.<br> <br> So, I am shopping for a heavy duty nut splitter no=
w, but I wanted to ask you guys if you have similar experience, or have bet=
ter ideas??<br> <br> Thanks,<br> Moto<br> </span></div>-- <br> You received=
 this message because you are subscribed to the Google Groups "NYCResistor:=
Microcontrollers" group.<br> To post to this group, send email to <a rel=3D=
"nofollow" class=3D"yiv2010866351moz-txt-link-abbreviated" ymailto=3D"mailt=
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 href=3D"mailto:nycresistormicrocontrollers@googlegroups.com">nycresistormi=
crocontrollers@googlegroups.com</a>.<br> To unsubscribe from this group, se=
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ibe@googlegroups.com">nycresistormicrocontrollers+unsubscribe@googlegroups.=
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roups.google.com/group/nycresistormicrocontrollers?hl=3Den">http://groups.g=
oogle.com/group/nycresistormicrocontrollers?hl=3Den</a>.<br></blockquote><d=
iv><br></div>-- <br> You received this message because you are subscribed t=
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is group, send email to nycresistormicrocontrollers@googlegroups.com.<br> T=
o unsubscribe
 from this group, send email to nycresistormicrocontrollers+unsubscribe@goo=
glegroups.com.<br> For more options, visit this group at http://groups.goog=
le.com/group/nycresistormicrocontrollers?hl=3Den.<br></div></blockquote></d=
iv></div>=0A=0A=0A=0A-- <br>=0AYou received this message because you are su=
bscribed to the Google Groups "NYCResistor:Microcontrollers" group.<br>=0AT=
o post to this group, send email to nycresistormicrocontrollers@googlegroup=
s.com.<br>=0ATo unsubscribe from this group, send email to nycresistormicro=
controllers+unsubscribe@googlegroups.com.<br>=0A=0AFor more options, visit =
this group at http://groups.google.com/group/nycresistormicrocontrollers?hl=
=3Den.<br>=0A=0A=0A</div><meta http-equiv=3D"x-dns-prefetch-control" conten=
t=3D"on"><br><br> </div> </div>  </div></body></html>
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