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Technical Data Sheet

LOCTITE

660™

December-2009

PRODUCT DESCRIPTION

LOCTITE

660™ provides the following product

characteristics:

Technology Acrylic

Chemical Type Urethane methacrylate

Appearance (uncured) Metallic gray paste

LMS

Fluorescence No

Components One component - requires no mixing

Viscosity High

Cure Anaerobic

Secondary Cure Activator

Application Retaining

Strength High

LOCTITE

660™ is designed for the bonding of cylindrical

fitting parts, particularly where bond gaps can approach 0.50

mm (0.02 in.). The product cures when confined in the absence

of air between close fitting metal surfaces and prevents

loosening and leakage from shock and vibration. This product

possesses excellent gap cure characteristics. Typical

applications include restoring correct fits on worn shafts, spun

bearings, and damaged keyways.

NSF International

Registered to NSF Category P1 for use as a sealant where

there is no possibilty of food contact in and around food

processing areas. Note: This is a regional approval. Please

contact your local Technical Service Center for more

information and clarification.

TYPICAL PROPERTIES OF UNCURED MATERIAL

Specific Gravity @ 25 °C 1.13

Flash Point - See MSDS

Viscosity, Brookfield - HBT, 25 °C, mPa·s (cP):

Spindle TB, speed 0.5 rpm,

Helipath

1,000,000 to 2,000,000

LMS

Spindle TB, speed 5.0 rpm,

Helipath

150,000 to 350,000

LMS

TYPICAL CURING PERFORMANCE

Cure Speed vs. Substrate

The rate of cure will depend on the substrate used. The graph

below shows the shear strength developed with time on steel

pins and collars compared to different materials and tested

according to ISO 10123.

% of Full Strength on Steel

Cure Time

100

1min 5min10min 30min 1h 3h 6h 24h 72h

Steel

Aluminum

Zinc dichromate

Cure Speed vs. Bond Gap

The rate of cure will depend on the bondline gap. The following

graph shows shear strength developed with time on steel pins

and collars at different controlled gaps and tested according to

ISO 10123.

% of Full Strength on Steel

Cure Time

100

1min 5min10min 30min 1h 3h 6h 24h 72h

0.154 mm

0.27 mm

Cure Speed vs. Temperature

The rate of cure will depend on the temperature. The graph

below shows the shear strength developed with time at

different temperatures on steel pins and collars and tested

according to ISO 10123.

% of Full Strength on Steel

Cure Time

100

1min 5min10min 30min 1h 3h 6h 24h 72h

4 °C

40 °C

22 °C

Documentation Provided By HMC Electronics

33 Springdale Ave. Canton, MA 02021

http://www.hmcelectronics.com

(800) 482-4440

Summary of content (3 pages)

PAGE 1
Technical Data Sheet LOCTITE® 660™ LOCTITE® 660™ is designed for the bonding of cylindrical fitting parts, particularly where bond gaps can approach 0.50 mm (0.02 in.). The product cures when confined in the absence of air between close fitting metal surfaces and prevents loosening and leakage from shock and vibration. This product possesses excellent gap cure characteristics. Typical applications include restoring correct fits on worn shafts, spun bearings, and damaged keyways.
PAGE 2
TDS LOCTITE® 660™, December-2009 100 75 Activator 7471™ 50 200 150 °C 150 0 1min 120 °C 100 50 Activator 7649™ 25 0 0 1000 No activator 5min10min 30min 1h 3h 6h 24h Cure Time 72h Physical Properties: Coefficient of Thermal Expansion, ISO 11359-2, K-1 Coefficient of Thermal Conductivity, ISO 8302, W/(m·K) Specific Heat, kJ/(kg·K) Elongation, at break, ISO 37, % 500 h 1000 h 100 100 Unleaded gasoline 22 100 100 100 Brake fluid 22 80 75 75 0.
PAGE 3
TDS LOCTITE® 660™, December-2009 5. For Shrink Fitted Assemblies the adhesive should be coated onto the pin, the collar should then be heated to create sufficient clearance for free assembly. 6. Parts should not be disturbed until sufficient handling strength is achieved. For Disassembly 1. Apply localized heat to the assembly to approximately 250 °C. Disassemble while hot. For Cleanup 1.