Retaining compounds
High-strength retaining compound for large diameter cylindrical components
Low-viscosity, high-strength retaining compound with good temperature resistance. Slow cure time makes it ideal for parts that need longer positioning time, such as large diameter parts or those made of active metals, such as brass.
All marks used are trademarks and/or registered trademarks of Henkel and its affiliates in the US, Germany, and elsewhere.
- Description
- Technical specification
LOCTITE® 640 is ideal when you need a retaining compound for parts that require a longer positioning time, such as large diameter parts or those made of active metals, such as brass. This high strength adhesive has a typical fixture time on steel of 2 hours, and a service temperature of -67°F to 347°F (-55°C to 175°C) when fully cured. The product's maximum diametrical clearance is 0.1 mm (0.0004"), and it fluoresces when exposed to UV light - great for quality control. Perfect for retaining keys and splines, eliminating backlash in worn assemblies, retaining bearings in place and preventing spin out, retaining rotor to shafts in fractional and subfractional horsepower motors, retaining bushings and sleeves in housings and on shafts, augmenting press fits, and restoring the fit to worn assemblies or out of tolerance parts. Also used for Mil-R-46082 military specifcation related applications.
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Slow curing for long assembly time
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Ideal for large diameter components
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High strength
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Good temperature resistance
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Meets Mil Spec: Mil-R-46082
Chemical basis / base:
Methacrylate
Color:
Green
Diametrical clearance:
< 0.1 mm
Fixture time:
2.0 hr.
Recommended for use with:
Metal: steel
Shear strength:
22.0 N/mm²
Viscosity, Falling Ball 'D', @ 25.0 °C:
450.0 mPa·s (cP) - 750.0 mPa·s (cP)