Loctite® 609 Retaining Compound Outlasts
The Bearings In Dental Handpiece
ChallengeNey manufactures is used to shape crowns and bridges in dental laboratories. During the design stage, they were looking to bond the turbine assembly, a subassembly of the handpiece which consist of a stainless steel shaft, bearings, turbine, and other parts, when air hits it, makes the shaft spin. These parts are made of stainless steel, brass, or aluminum and are slid onto the shaft. Because it is a high-speed, low-torque, air-driven handpiece, spinning at 300,000 rpm, Ney design engineers required high bond strength and reliability. Ease of assembly was another requirement, as Ney manufactures hundreds of these each month. SolutionLoctite Retaining Compounds fit the bill. Loctite® RC ™ 609 is a low viscosity, rapid-curing liquid. It augments the strength of press-fit assemblies and can be used on slip fits up to "005" diametrical clearance. RC 609 fixtures in 10 minutes on unprimed steel at room temperature, providing a shear strength of 3000 psi at full cure. Manual application of RC 609 is made easy with Loctite's 10 ml bottles and small gauge dispensing needles. |
Ney Dental relies on Loctite 609 to bond the turbine assembly of its new handpiece. In fact, Loctite® RC ™ 609 Retaining Compound is now used on all their slip fit assemblies with gaps of .002" to .003" to provide a strong bond. |
Results
Loctite RC 609 provides a strong bond in the turbine assembly and is now used on their slip-fit assemblies with gaps of "002" to "003". Even when used 8 hours a day, the average life of this handpiece is one to three years. Andy Dybicz, Manager of Quality Assurance claims that parts are easily repaired. “Usually the bearings wear out first, with the Loctite adhesive still holding. So we replace the bearings, apply Loctite RC 609, and the handpiece is as good as new.”
April 17th, 2009 |
Retaining |
Tags: Bonding, dental, handpiece, Loctite, Loctite RC 609, Loctite Retaining Compound, Retaining
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May 2nd, 2009 at 3:34 pm
2001 XKR Jaguar aluminum support mount for front upper suspension yoke. 16mm bolt has slogged out the aluminum and causes knocking sound. Option is to ream out and fit a bronze bush or do you have a product that would take up the wear between bolt and aluminum? A high degree of strenght is required. I look forward to your reply.
May 4th, 2009 at 6:50 pm
Depending on how bad the wear is a worn out thread can be repaired using Loctite Stripped Thread Repair Kit. For application details download: http://www.henkelna.com/us/content_data/LT1475_Do_It_Right_User_Guide.pdf
Loctite 680 High Strength Retaining Compound is commonly used for retaining bushes into the housing. It can take gaps to 0.27 mm (dia). The application guide above provides details on how-to-use Loctite retaining compounds as well.
For technical support and product selection contact Loctite in your country through the contact details provided on http://www.loctite.com
Prad.
May 8th, 2009 at 6:09 am
I have an idler pulley for a 1973 Trans Am, the bearing went bad, and was pressed in. I was able to pull the bearing out, but when I press the new one in, it moves up and down. the old one was retained because the lip of the bearing area, I believe, was rolled over to help hold the bearing still. The bearing measures 1.850 dia, and the pulley where the bearing gets pressed in is 1.855 dia. Would 609 work for that, or should I use something else like 660?