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Author Topic: Bell or Neilsen K50 Round Chain Grinder  (Read 3143 times)

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Offline 660magnum

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Bell or Neilsen K50 Round Chain Grinder
« on: December 31, 2012, 07:01:08 pm »
The Bells came before the Silveys & Oregons and were a continuation of the Neilsen line of grinders I think? There was a whole series of them. This one doesn't have 10 degree tilt but many people don't use that anyway or they don't use chains with tilted top plates. These use a smaller wheel and a higher rpm motor. The wheels for these are still advertised for sale. This one will need a cord. It looks to be fabricated and if ever anything broke, you could probably make it or get it made locally.

This grinder was made for many years so you will see some variations in the motor used and various other changes as time went on. Also this may be a Neilson or a Bell brand depending on age?

4 X 3/8 X 3/16 wheel for 3/8 and 404 chain (R) FOR RESINOID
4 X 3/8 X 1/8 Wheel for 3/8 LP and .325 chain

These grinders were models K50, K100B, K150, KB1

This post is put here mainly for historical curosity as this grinder probably dates in the 70's?  It is located near Lancaster, Pa $75

http://reading.craigslist.org/tls/3509088159.html
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Offline 660magnum

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Re: Bell K50 Round Chain Grinder
« Reply #1 on: January 03, 2013, 06:13:09 pm »
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Offline 660magnum

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Re: Bell K50 Round Chain Grinder
« Reply #2 on: January 14, 2013, 10:37:30 am »
Need any Neilsen or Bell parts?

Brooks Lumber Sales Inc at 1441 Oak St, Eugene, OR. Call them at (541) 342-4578
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Offline Cut4fun .

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Re: Bell or Neilsen K50 Round Chain Grinder
« Reply #3 on: February 20, 2020, 09:58:22 am »
@Philbert  wanted to share this in thread.

Bell Neilson Grinder Stuff

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Offline Cut4fun .

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Re: Bell or Neilsen K50 Round Chain Grinder
« Reply #4 on: February 20, 2020, 10:00:12 am »
@Philbert  more

Took 2 tries to resize auto way to get down to size to save here.



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Online ray benson

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Re: Bell or Neilsen K50 Round Chain Grinder
« Reply #5 on: February 21, 2020, 09:18:06 am »
Converted Philbert and devonhubb photos to a pdf - it is about 18 meg.
http://www.mediafire.com/file/775zlbz04nvanuq/Bell_K50_Nielsen_grinder.pdf/file
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Re: Bell or Neilsen K50 Round Chain Grinder
« Reply #6 on: February 22, 2020, 08:37:20 am »
Guy in my CRG said =  Brooks Engineered Products
Phone 541-343-0458 is where to call for parts for these.
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Offline Elden

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Re: Bell or Neilsen K50 Round Chain Grinder
« Reply #7 on: January 27, 2021, 12:57:34 am »
   I have one of these Nielsen K50 grinders that I use for grinding depth gauges. It is a nice little machine. I really like the way the vise clamps the chain. It clamps two drive links at the same time, so that entire cutter (and depth gauge) is held down.
  I would like to be able to reverse the motor, however. One can tell the difference in the feel of the grind when doing left and right hand depth gauges with a non-reversing grinder.
1. Seeing that the schematic and exploded view show a rectifier bridge (K50-7), can one assume that this is a DC motor?
2.  If so, could  a DPDT switch be used to reverse the motor?
3.  If so, would it be located between the capacitor (K50-8) and the motor?
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Re: Bell or Neilsen K50 Round Chain Grinder
« Reply #8 on: January 27, 2021, 08:08:00 am »
Might try   picking this guys brain. @Al Smith
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Offline 3000 FPS

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Re: Bell or Neilsen K50 Round Chain Grinder
« Reply #9 on: January 28, 2021, 01:42:10 pm »
Quote from: Elden on January 27, 2021, 12:57:34 am
   I have one of these Nielsen K50 grinders that I use for grinding depth gauges. It is a nice little machine. I really like the way the vise clamps the chain. It clamps two drive links at the same time, so that entire cutter (and depth gauge) is held down.
  I would like to be able to reverse the motor, however. One can tell the difference in the feel of the grind when doing left and right hand depth gauges with a non-reversing grinder.
1. Seeing that the schematic and exploded view show a rectifier bridge (K50-7), can one assume that this is a DC motor?
2.  If so, could  a DPDT switch be used to reverse the motor?
3.  If so, would it be located between the capacitor (K50-8) and the motor?

Yes according to that schematic that is a Full wave bridge feeding into that motor.  So a DC motor. 
And I believe you are correct if you put a DPDT Switch at the motor it will reverse polarity.    The cap is a filtering cap for smoothing out the DC.  The wires are marked black and white.
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