Need Some background on Clutches

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Discussion Overview

The discussion centers around the identification and sourcing of TwinDisc clutches, particularly in the context of assisting a customer with parts for a clutch that lacks identifiable markings. Participants explore various methods for identifying clutches and share experiences related to clutch specifications and sourcing parts.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant seeks assistance in identifying a TwinDisc clutch without a part number, expressing a desire to help a customer.
  • Another participant suggests measuring the outside diameter of the clutch plates, plate thickness, spline tooth count, and spline diameters as methods to identify the clutch and find replacement parts.
  • A different participant mentions that dual and three disc clutches are typically used in high horsepower racing applications and provides a link to a potential source for parts.
  • One participant shares a personal experience of successfully sourcing a clutch based solely on disk diameter, emphasizing the importance of this measurement in identifying the correct part.
  • There is a light-hearted acknowledgment of delays in responses among participants.

Areas of Agreement / Disagreement

Participants present various methods and experiences related to identifying clutches, but there is no consensus on a single approach or solution. Multiple perspectives on sourcing and specifications remain evident.

Contextual Notes

Participants rely on specific measurements and experiences, but there may be limitations in the assumptions made about standardization and availability of parts across different manufacturers.

Ronnin
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I had a customer the other day inquire about TwinDisc clutches he's trying to buy parts for. This is out of my realm of the usual say to day stuff I sell but I would like to try to help him because he's a good customer. This particular clutch no longer has anything to ID it so I don't have a part number. I tried looking on TD's website but there isn't any exploded diagrams for me to figure out what I need. Does anyone here mess with these? I'd like to educate myself on them a bit before I just refer him to someone else.
 
Last edited:
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Sorry about the delay...

What make and model equipment was the clutch from?
A twin disc clutch, or twin plate clutch is often used on a tractor to disconnect both the PTO drive and the drive to the transmission and wheels using one action.

Measure the outside diameter of the two clutch plates.
Measure the plate thickness.
Count the number of teeth on the spline.
Measure the spline inner and outer diameter.

The disc diameter and spline tooth count is usually enough to reduce the search for replacement friction plates.
That may also lead to the identity of the clutch manufacturer.
 
The dual and 3 disc clutch setups are for high horsepower racing applications typically. Tilton would be a good source .
https://www.pegasusautoracing.com/productdetails.asp?RecID=30664
Dual clutch are used for increased towing where a large clutch diameter is not practical. you increase surface area but keep footprint of the bell housing small.
 
Some years ago I was looking for a clutch that was used in a piece of ag equipment. The disk diameter was eleven inches. The company was out of business but I knew that clutch had to be 'standard' but couldn't find anyone who knew anything about them or what to spec. Finally I had a mechanic who ran a small shop hand me a piece of paper with a phone number on it and simply said: Call these guys. I dialed the number not knowing who I would even be connected to and it turned out to be Rockford Clutch Company. I told the lady what I was after, she asked the disk diameter and they shipped the correct clutch. No machine model number, no part number, nothing except the disk diameter. I was amazed.
 
Baluncore said:
Sorry about the delay...

Understatement of the week. :oldshy:
 
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