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Old 05-25-2008, 11:01 PM   #1
klm4755 OP
Studly Adventurer
Joined: Jun 2006
Oddometer: 577
Chain O-ring WD-40 exposure effects study and results

Enclosed is a study to examine the effects of Chain link O-ring exposure to various solvent, cleaners, and lubrications. Many “home grown” solutions exist as to the best method to clean and lube an O-ring type chain. Most popular is the usage of WD-40. The intent of this study is to determine if WD-40 and other commonly used chemicals are detrimental to the chains o-ring and it’s function. The study will consist of 4 parts:
1. Test set-up and controls
2. Short term continuous exposure results. Short term will be defined as 24 hours
3. Long term continuous exposure results. Long term evaluations will occur at regular intervals (monthly?) till a conclusion can be reached.
4. Study conclusion.

Part 1

Start all projects by reviewing relevant data related to the mod/topic

The source of the O-rings. DID master link from a 520 type chain.

extract the 8x O-rings for the study

set up an exam area. Did consider weighing the O-rings, but sold my gram scale when completed college......Hehehe Good times!

Evaluate, measure and record the dimensions. This case inner diameter with an adjustable ball gage. Dimensions are use to check for O-ring swelling.

check dia of ball gage. Inner dia = .227 inch

outer diameter =.356 inch

thickness = .073 inch

record dimensions

macro view of O-ring

O-ring side view

The 7x Fluids to evaluate

The container list: 1. WD-40, 2. Kerosine, 3. Gasoline, 4. LPS-3, 5. DOT 4 brake fluid, 6. PJ1 Chain lube, 7. Gumout carb cleaner

adding the fluids to the cavities

ready for O-ring insertion

Mark date and install O-rings

wrap-up container and store in garage.

Part 2
After 24 hours the O-rings were removed and examined visually for signs of distress. Quick comparison of all O-rings with the control O-ring some signs of swelling.
Each O-ring was squeezed and released to evaluate the elasticity and for signs of brittleness.

O-rings after 24 hours

removing the WD-40 exposed O-ring

WD-40 exposed O-ring ready to dry and evaluate

WD-40 exposed O-ring optical enhanced examination. Looks A-ok

measure thickness of WD-40 exposed O-ring

measure outer diameter of WD-40 exposed O-ring

WD-40 on left air exposed control on right

detail results of review on form

Repeat steps for Kerosene (Kerosene on left, air on right)

Repeat steps for Gasoline (Gasoline on left, air on right)

squeeze test for elasticity evaluation

Repeat steps for LPS-3 (LPS-3 on left, air on right)

Repeat steps for Brake Fluid (Brake fluid on left, air on right)

Repeat steps for PJ1chain lube (PJ1on left, air on right)

last sample....Grandama is still looking for her pill box....hehehe

Repeat steps for carb cleaner (carb cleaner on left, air on right)

Table of results
Conclusion of short term exposure:
1. Carb cleaner and Gasoline samples swelled to significant sizes. Definitely not recommended to use these fluids to clean an O-ring type chain. The carb cleaner exposed O-ring increased in diameter by 29%! The gasoline exposed O-ring increased in diameter by 11%.
2. WD-40, and Kerosene seem to have negligible to no effect on the O-rings (+/-1%)
3. Brake fluid, and PJ1 chain lube seem to have a negligible to small effect on the O-ring’s size.

Ready to ride
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