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Mike Murray
Telechron "B" Clock Rotors Turning @ 60 or 30 R.P.M.'s.
Copyright © 1995-2026 Michael P. Murray & Mike's Clock Clinic
Mike Murray Memberships: NAWCC
P. O. Box 562
1151 D Street
Fossil, OR 97830-0562
The P.O. Box is for the USPS only and should be removed for all other carriers.
Please do NOT call or E-mail unless you have read this entire Web page
E-mail address: Mike@telechron.us (Preferred contact method)
Telechron "B" Clock Rotors Turning @ 60 or 30 R.P.M.'s
All checks must be made out to Mike Murray because I gave up my
business checking.
My business is rebuilding your original motor. The type "B"
is the larger rotor.
All 60 & 30 R.P.M. "B" rotors cost $150.00 plus $20.00
priority mail (Canada is $45.00) and have a 2-year warranty, which brings
your total cost to $170.00.
I must have the old rotor or add $150.00. "B-3's" turning
at 60 & 30 R.P.M.'s are extremely rare. The reason for the price
increase on buying a replacement rotor is because of rarity. Typically
aluminum rotors have a M # of 3300 or higher.
My turnaround is 6 to 8 weeks for motor service, 8 to 12 months if
the clock isvsent with the motor, or if the movement is overhauled.
All rotor only service requires prepayment made out to Mike Murray,
unless you don'tvmind waiting a year.
I no longer offer expedited service.
All rebuilt's from whatever source, will have some noise.
Rebuilt's will vbe significantly quieter but all will carry some noise.
The one disadvantage of an aluminum cased rotor is that Telechron
used fibervboard plates and then coated them (dipped) in phenolic resin
whereas the pre-aluminum rotors used copper plates. Three of the
seven wheels, in the "B" rotor, are also phenolic resin and that material
was used to reduce noise of the wheels meshing but actually these plates
increased the overall noise of the rotor. Phenolic plates will never
last as long as copper and the material was used to reduce overall
production costs but should last for years. It is because of
these plates that the noise level of any rebuilt aluminum rotor will
be greater than the copper plates of original rotors. So I
strongly suggest you do NOT use an baluminum rotor for clocks
located in your sleeping area.
All aluminum "B-13's" and "BC-3's" rotors are replacement
rotors. Meaning that they were manufactured after your clock was made
in order to save production costs on replacements. For an extra $150.00,
I can replace your aluminum cased "B" rotor with an older nickel
cased "B-3" rotor. The "B-3" has copper plates and
will generally last 2 to 4 times longer then their aluminum counter parts
($320.00 total).
I do sell complete NOS (new old stock) aluminum 60 RPM rotors and
motors and for that please see the following:
M-3583 Aluminum 60 RPM rotor
M-3583 Aluminum 60 RPM complete motor
If you want to send in the clock for motor or rotor replacement,
please be advised that your costs will increase by $110.00 with
everything else staying the same. The increase covers the
increase in return shipping and insurance and includes my labor
charge of $50.00 for the replacement service. I can ship
at that price for clocks up to 22" long ($275.00 total).
The drive end of the rotor (output shaft) can have many different
and removable pinions (gears). You must save and reuse that pinion
and please don't assume that the 15 tooth pinion I have will work
for your application.
I have more of the pinion-less rotors than the rotors with
pinions. Please order the pinion-less rotors first because you
can always remove the pinion from your existing rotor and transfer
it over. All pinion are attached via a set screw and are either
12 or 15 toothed. I only have The 15 tooth pinion.
In general, all movements with 60 RPM rotors would fall into
needing an overhaul and that starts at $1,000.00 plus shipping.
Needing a overhaul is somewhat rare and depends how long the
Revere has been in service. The earliest were made in the 1920's
and many were sold in the 1930's to 1960's. So after 80+ years
of running, the mechanism is probably on its last legs. But
some just keep on going. What I'm trying to say is that the necessity
of an overhaul is unknown until I test it. However, most
60 RPM rotor movements most likely will need overhauls because
of their age, usage and repair attempts made by people who simply
did not know what they were dealing with.
I do my best to ascertain whether or not you need a movement
overhaul upon initial examination. If I feel it does need to be
overhauled, I contact you in case you want it returned with nothing
being done. I charge $50.00 for my time and whatever the shipping
happens to be either $50.00 or $75.00 depending on the size of your
case.
One thing you can do before you send in the motor
(coil, field, & rotor) is to take a Multimeter or Volt/Ohm meter,
these are less than $20.00 at any hardware store, and with no
current on the clock, set the meter to Ohms and touch the two
leads to the end of the wires or the posts on the coil where the
wires connect and see if you get a reading. Just about any
reading is a good one. But if you get no reading what-so-ever
then the motor's coil is dead and you'll need a replacement coil.
I'll not ship the rotor until I received payment. I accept
personal checks, certified checks, or company checks for payment
but repeat customers may use personal checks. Normally shipping
takes place one week or so after I receive payment and thanks!
If you use a personal check then please allow 10 days before
shipping to allow the check to clear.
I have a quick guide for extraction and installation of the "B" rotor.
Click on the Quick guide to the "B"rotor.
A few things you should know about the 60 RPM rotor and its
application. If it is a "B-3" then it takes a 4-watt coil
and if it is anything else then it most likely is a 6-watt coil.
A list of Telechron coils and their wattage is at:
http://www.telechron.us/m-rotor.html#Coils
The 60 RPM rotor is the weakest of all rotors which means that
the movement must be in near perfect shape. So if after a rotor
is rebuild and your clock stops or runs for a while and then stops,
then your movement needs to be overhauled. If you send the
movement for an overhaul be aware that your cost will be at least
$1,000.00 plus return shipping and that is assuming your clock is
suppose to chime each quarter hour.
Everything about the 60 is tricky except the rotor rebuild.
I mentioned the coil because at too weak coil will not give the
necessary power to the rotor. A 4-watt coil is $150.00 plus
shipping and I don't sell the 6-watt coil because I only have
enough for sales of the newer aluminum 60 RPM rotors with the
field and coil. But a 4-watt coil should be able to drive the
6-watt rotor but a 2-watt coil will not.
If it runs okay time wise but has a sluggish chime then a
4-watt coil may help but it is not a guarantee nor will it
overcome a movement that is worn and needs to be overhauled.
One last note. For $300.00 plus shipping ($20.00 USPS
Advantage Ground) I can turn one of these new (that's new
old stock) rotor into a new 1 RPM rotor. The reason it
would be new is because I can replace the missing 4 gears
(wheels) that are missing to make these turn at 1 RPM.
Telechron used the same plates for all rotors and if I
were to convert one of these 60 RPM rotors then you would
have new unworn bearings and I'd supply all that's missing.
These converted rotors would have my 2-year warranty
and the only down side is that the rotor case would still
have the original information, which would no longer be
accurate. I would scribe the fact that it was converted
into a 1 RPM rotor and I would make a label as well with a
Brother label maker, which you could peal off.
For return shipping I use USPS for all shipping.
If you want to use another carrier then you will have to
arrange everything for shipping, meaning I hand the box
to the driver, get a receipt and nothing else.
All checks must be made out to Mike Murray because
I gave up my business checking.
I would like payment by money order, certified check,
personal check, business check, or through Pay Pal or Square,
which is the only way I take credit cards. I do prefer a
check over Pay Pal or Square because Pay Pal and Square
take 4%. I only take credit cards if you are in the USA
or Canada.
The 4% is added to the total bill if you use a credit card.
With either Pay Pal or Square, I will send an invoice
to your E-mail address. Here you are dealing directly with
either service and not me.
You do not have to be a member of Pay Pal or Square in
order to issue a payment but the 4% will be added to your
total bill.
All of the added fees are exactly what either service
charges me for taking your credit card.
I do accept checks, Zelle using atmosman@earthlink.net,
money orders, or I can sent a Pay Pal invoice but it will
be 4% higher to cover what they charge me. Checks and
Money Orders must be mailed to Mike Murray, P.O. Box 562,
Fossil, OR 97830-0562 but please double check the final
price with me before you send any money however you sent it.
I teach rotor rebuilding and you can check it out at:
My Rotor Rebuilding Course
Respectfully,
Michael P. Murray
Memberships Include:
National Association of Watch & Clock Collectors
An Internet private E-mailing list called Clocksmiths
N.A.W.C.C. National 400-day Clock Chapter # 168
A service from, E-mail address: Mike@telechron.us
Mike Murray Founder of Clocksmiths
A specialist in Atmos and 400-day clock repair.
Also, I overhaul most plug in electric clocks.
In continuous service since 04/01/1982.
Mike's Clock Clinic Memberships: Clocksmiths & NAWCC
P. O. Box 562
1151 D Street
Fossil, OR 97830-0562
Phone: 541-370-2440
My main Web site is located at http://www.atmosman.com/
Main FTP site is located at http://www.atmosman.com/earthpdf.html
Memberships: Clocksmiths & NAWCC
N.A.W.C.C. International 400-day Clock Chapter # 168
Published in Chapter 168's "Torsion Times"
Published in AWCI's "Horological Times"
Formally AWCI's 400-day (Anniversary) clock Bench Course Instructor!
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Copyright © 1995-2026 Michael P. Murray & Mike's Clock Clinic
Created in December of 1995 and last updated January 02, 2026
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