A massive volume of complex bearing data and procedure is supplied by most bearing companies. If you are like me, you just do not have the time, tolerance, or curiosity, in wading via all of this details, with price efficiency becoming unsupported by the regular require to outsource bearing servicing, but however do have an interest in operating expense reduction for your tree stump grinder. Alternative bearings cost above £100 each and every, and signify a large part of overall device servicing costs. This manual is intended for people who want to minimize cost by increasing bearing services life. Bearing failure or untimely bearing put on on stump grinders is mostly due to inadequate maintenance of clean lubricant. I use a pneumatic grease dispenser pushed by an air compressor at each and every days finish of stump grinding, with a grease prime up, out in the field, utilizing a conventional hand-held grease pump. I use a wonderful deal of grease but it is far cheaper than replacement bearings. When I re-grease bearings, I thoroughly purge out the contaminated grease, till cleanse grease exudes from the bearing. A substantial melting position EP-2 grease is vital. I desire a molybdenum disulphide (moly) enriched EP-two complicated grease because it is a heavy-duty grease. So, to sum up this paragraph, there are 3 concepts of maximizing bearing existence insofar as lubricants are concerned:
decide on the proper grease
utilize the right grease properly e.g in the appropriate amount
re-grease regularly
A next typical explanation for untimely bearing use on stump grinders is insufficient or incorrect bearing adjustment ( for these equipment with an adjustable bearing dress in takeup) Now, I know how awkward accessing bearings for adjustment, can be on stump grinders. I manufactured up some specialised instruments out of allen keys, owing to their challenging, high quality metal material, as a function all around to the awkward access problem I have on my grinder. I just floor away excess substance with a bench grinder to form an allen important into a right-angled punch. If you are comfy performing this, remember to be confident to usually great the allen crucial in drinking water. Do not allow it switch blue in colour. I come from an engineering history, and acknowledge that numerous who might go through this, do not. Several could feel this to be considerably out of their depth. This is why I’m creating this energy to steer clear of technicalities as much as feasible with emphasis on bare minimum salient details. I’m not conversant with bearing accessibility configurations on all brand names of stump grinders, but I cannot above emphasis how, with a little bit of initiative and dedication, the value to conquer a bearing obtain problem is. It will conserve you money.
The detection and investigation of untimely bearing failure is by its mother nature a complex subject involving specialised products e.g. warmth sensors, vibration sensors, infrared sensors, oil and ultrasound examination equipment. All of this tools generates a excellent offer of information, is very expensive, and entirely impractical out in the field. A non technical tree stump grinder who is dependent upon the continuous operation of his stump grinding machine will simply be set off by this predicament. The best, most sensible and non technological way to about keep an eye on bearing functionality is to relaxation your hand on the pillow block bearing after operating it for a reasonable length of time, say at minimum one hour. If you should remove your hand because the bearing is also scorching, this suggests a worn bearing. Adjustment to take up extreme perform within the bearing be created in accordance with makers directions. If the audio of a bearing “knock or rumble” is also read, this usually signifies it is excessively worn and wants alternative. For these who my be interested, there are 4 phases of bearing failure which I will touch on, as it does get involved and is not in maintaining with this scope and its goal.:
Stage one. Vibration investigation detects the earliest signal of bearing failure. Sign info appears in the ultrasonic frequency variety band all around 250 to 350 Kilo Hz.. At this position there is about ten-twenty per cent remaining bearing daily life.
Phase two. Bearing failure commences to “ring” at its organic frequency (five hundred – 2000 Hz) At this stage there is five to ten% bearing lifestyle left.
Phase three. bearing failure harmonics are obvious with flaws in the interior and outer races. Temperature improve is now evident with 1 to 5% bearing existence left
Stage four. Large vibration is distinct with random ultrasonic sound significantly increased, temperature boosts speedily. One particular hour to a single per cent remaining life.
It is unfortunate for all stump grinder operators, that by the time a bearing knocks, rumbles, or significantly heats up, it is soon on its way to failure. There is no useful way for the regular proprietor / operator to correctly judge the size of serviceable time remaining in a stump grinders bearing whilst out in the subject.
From this viewpoint, I am generating an endeavor to try out to collect some useable info out in the discipline, which may possibly prove to be a sensible and economical way to monitor bearing serviceability. I will be installing thermocouples (heat sensors) to the bearings. If a managing common temperature gradient can be set up, it could confirm valuable to people stump grinders who are worried with maximizing their equipment bearing lifestyle, by just altering up their bearings, when its temperature increase signifies time to do so. This will need some work on the element of individuals interested. They also will want to match thermocouples to their bearings to monitor temperature as the only cost-successful, and practical way to know when to alter up their bearings.
This work will be entirely negated if a rigid and sufficient re-greasing program is not preserved. What would be fag bearing of typical, well timed, bearing adjustments, if the bearings often ran in a bed of contaminated grease. I think the reader will concur, is a complete squander of time and hard work.