September 04, 2008
Reader response to last weeks balancing tip
To Maintenance Tips readers:
I have never had a problem getting the reflective tape to stick to a shaft after I have lightly cleaned the shaft, either with a paper shop towel or in conjunction with a mild degreaser (such as acetone or “Goof Off” stain remover).
Getting the paper off the back of the tape isn’t that difficult either. Try bending the tape backwards, which will leave a crease in the tape which you can then pry off easily.
For picking up speed, I normally use a LED tachometer from Monarch Instrument (Model ROS-P part of a Tach-4AR kit) that is not bothered by shiny shaft surfaces. Lasers do have trouble with this and it is totally related to contrast. If you aim the laser directly at the shaft the contrast will not be very good between the shaft and reflective tape. Try aiming the laser at an angle to the shaft, i. e., not perpendicular, and the contrast will improve.
Finally, DO NOT EVER USE A KNIFE AGAINST A SHAFT. This will leave a score mark that could create a fatigue crack initiation site.
Reader tip response provided by
Lyn Greenhill, P. E.
President
DynaTech Engineering, Inc.
Roseville, CA 95661
Tel: 916-783-2400 x11
http://www.dynatechengr.com
Lyn - Thank you for clearing up some of the information we included last week. I am confident that all Maintenance Tips readers appreciate that you shared your knowledge and experience. Your Maintenance Tips hat and stainless steel, diamond plate Reliabilityweb.com coffee mug is on the way. Thank you again.
