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Mike Murray
Telechron "B" Clock Rotors Turning @ 60 or 30 R.P.M.'s.
Copyright © 1995-2025 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 is
sent with the motor, or if the movement is overhauled.
All rotor only service requires prepayment made out to Mike Murray, unless you don't
mind waiting a year.
I no longer offer expedited service.
All rebuilt's from whatever source, will have some noise. Rebuilt's will
be significantly quieter but all will carry some noise.
The one disadvantage of an aluminum cased rotor is that Telechron used fiber
board 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
aluminum 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 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!
Back to Mike's Clock Clinic's Telechron Web Page
Copyright © 1995-2025 Michael P. Murray & Mike's Clock Clinic
Created in December of 1995 and last updated January 02, 2025.