Overview
Building and testing machines without the use of Loctite can be inefficient and costly. At best, time is lost in continuously checking and re-tightening loose screws and bolts. At worst, these loose parts wear prematurely or may cause damage when they fall off of the machines. Such accidents cause machine downtime in the field as well as increased costs in warranty, parts and labour.
Loctite should be used on all machine fasteners except those involving countersunk fasteners, change parts and plastics, as well as on fasteners which secure adjustable machine parts.
Loctite Grades
Wexxar uses four grades of Loctite. Be sure to use the appropriate grade for the desired application. Choose from one of the following:
| Red (222) | |
|---|---|
Red is the strongest grade of Loctite. It is almost unbreakable and should be used only with fasteners securing components which will very rarely be removed. When the removal of these fasteners is required, they can be drilled out. In particular, red Loctite should be applied to the capscrews which secure the major flap folders to their drive assemblies. This screw must be made very secure because it is totally inaccessible after machine assembly is complete. |  |
| Purple (262) | |
| Purple Loctite is used for the smallest fasteners because it has the weakest bond. Screws and bolts sized #10 and smaller should be secured only with purple Loctite. | |
| Blue (242) | |
| Blue Loctite should be used for all screws and other fasteners larger than #10. | |
| Loctite 567 | |
| Pneumatic assemblies involve materials which can be corroded by Loctite 222, 242, or 262. Loctite 567 thread sealant has been developed especially for pneumatic component fittings. | |
Where not to use Loctite
- Countersunk fasteners: Do not use Loctite on countersunk fasteners except on those which require Red Loctite.
- Plastics: Do not use any grade of Loctite with fasteners which may be in contact with lexan or acrylic surfaces. The chemicals in Loctite will corrode such materials and make them brittle, leading to cracks. It is best to keep Loctite away from all plastics, including guard doors, control handles, etc.
- Change Parts / Adjustable Components: Do not use Loctite with any assemblies or components which are frequently adjusted or removed.
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