Industrial Kiln Information
This page offers answers to common questions regarding industrial kilns.
If you have specific questions, or need more information, simply get in touch with us. You can call our office or send us a message online.
Answers to Common QuestionsHow does NAK Kiln Services locate and adjust the center of rotation to provide the most accurate kiln alignment possible?
We use laser based technology to locate the coordinates of the 3, 6, and 9 o’clock positions of all tires. We then use NAK developed software to calculate the coordinates of the center of rotation at each pier. The misalignment of the shell relative to the desired kiln axis is then computer generated for each pier. The coordinates of the shell center of rotation at each tire is the only kiln axis variable that can be controlled. Locating and adjusting the center of rotation provides the most accurate kiln alignment possible.
Adjusting rollers parallel to the kiln axis is vital. The size of the angle between a roller axis and the kiln axis controls the thrust load on that roller and the thrust roller pressure. We adjust all rollers parallel to the kiln axis to an accuracy of 0.005” per foot. No other kiln alignment system considers this an important requirement and its relevant stability implications. Click here to read "Roller Alignment Relative to Kiln Axis"
We measure the end cap pressure on AC and Fuller kilns and the thrust collar pressure on FLS kilns. We adjust all support roller bearings as necessary to lower cap end pressures/thrust collar pressures to less than 200 psi. No other kiln service provider measures end cap pressures or thrust collar pressures. No other company includes corrective bearing adjustments as part of the alignment scope of work. Click here to read "Measurement of End Cap and Thrust Collar Pressure".
We lower high ovalities by adjusting rollers to transfer pier load to low ovality piers. We do this to the extent that bearing pressures and hertz pressure limitations allow. No other kiln alignment system identifies pier load distribution as a variable affecting ovality. No other kiln service provider includes bearing adjustments to optimize pier load distribution as part of the alignment scope of work.
We measure the effects of dogleg conditions by measuring the lateral movement of the tire center at each pier. Depending on the severity of a dogleg, such movement may be as high as 5/8". The resulting load variation on the support rollers stresses the shell, the rollers, the base and the pier cap. We provide specific cost effective procedures to correct doglegs without shell replacement. No other kiln service provider includes this important measurement and its stability implications as part of the alignment scope of work.
We provide expert analysis regarding the mechanical status of the kiln. We make prioritized repair recommendations for planning purposes. We provide specific repair recommendations guaranteed to correct high tire retainer pressures. High tire retainer pressure is caused by the misalignment of the plane of the tire relative to the rotating axis of the kiln. Click here to read "Tire Retainer Pressure Correction Paper"