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Mike Murray
Telechron "B" Clock Rotors Turning @ 60 or 30 R.P.M.'s.

Copyright © 1995-2024 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.

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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 4 to 6 weeks for motor service, 6 to 8 months if the clock is sentwith the motor, or if the movement is overhauled. 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: 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.
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 3%. I only take credit cards if you are in the USA or Canada. The 3% 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 3% will be added to your total bill. All of the added fees are exactly what either service charges me for taking your credit card.

My main Web site is located at Main FTP site is located at
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 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 Main FTP site is located at 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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Created in December of 1995 and last updated January 02, 2024.