Dri-Loc® adhesives
(from Loctite Corporation), applied to threaded parts, form
a unique coating that converts ordinary fasteners into self-locking
fasteners.
Dry to
the touch, Dri-Loc adhesives become an integral
part of the fastener and stay
inert until parts are used. During the assembly
process, Dri-Loc adhesive is activated by
assembly forces, releasing
anaerobic adhesive which locks parts securely.
Dri-Loc adhesives are applied
to the full circumference of the fastener. Resin fills all
voids in the threads when installed, and cures to form an
excellent seal to both liquids and gases. (For pre-applied
non-locking thread sealant, see Vibra-Seal®)
Dri-Loc adhesives are designed
for applications where specific shear strengths, temperature
range and substrate types are necessary.
All Dri-Loc adhesives harden
in the absence of air on ferrous and nonferrous metals without
primer, activators or heat. They exhibit controlled lubricity,
low on torque and are dry to touch for ease of assembly with
automatic or hand tools.
For convenience, coatings
are color coded to indicate strength range and for easy inspection.
Bolts with diameters of 1/16” through ¾” and
with shank lengths of 3/8” to 6” can be coated
with our specially developed equipment.
Specifications
| Resin
(anaerobic) |
Dimethacrylate |
Flashpoint
(Cleveland open cup)
|
Above
200°F (93°C)
|
| On-Part
Life at 68°F/20°C (±20°F/-7°C
and 50% RH) |
4
years |
| Toxicity |
low |
| Specific
Gravity |
1.05
to 1.15 |
| Cure
Speed @ 70°F/21°C |
10-minute
fixture; full cure in 72 hours |
| On-torque |
Low
installation torque |
|
Torque Tension
The tension in the fastener
can be reasonably controlled by controlling the torque. For
any given fastener the torque tension relationship can be
stated as follows:
T = KDF
where T =
Torque, lb.-in. (N•m)
D =
Nominal bolt diameter, in. (m)
F =
Tension or clamping force, lbs. (N)
K is
a universal constant for all sizes which can be established
empirically.
(You can find safe stresses
for bolts in manufacturers’ fasteners specifications
or tool engineers’ handbooks).
K Values for Dri-Loc® Adhesives
| |
K Value |
Zinc
Phosphate/oil
|
0.11
|
| Dri-Loc 200 |
0.12 |
| Dri-Loc 201 |
0.15 |
| Dri-Loc 202 |
0.13 |
| Dri-Loc 203 |
0.11 |
| Dri-Loc 204 |
0.18 |
|
(Example: Dri-Loc
200 on 3/8”-16, Grade 5, Zinc Phosphate bolt: T = 0.12
x .375 x 5000 = 225 lb.-in.)
Performance
Listed below are the standard
Dri-Loc adhesive formuli. In addition, Long-Lok can formulate
custom Dri-Loc adhesives to meet your application’s
particular requirements for locking and sealing performance.
These special formulations are created in response to your
specific requirement.
| Formula |
Color
Code |
Strength
Range |
Shear
Strength (psi) |
Temperature
Range |
Sample
Breakaway/Prevailing Torque Value (lb-in.)
per Fastener Size |
| 1/4-20 |
5/16-18 |
3/8-16 |
7/16-14 |
1/2-13 |
5/8-11 |
| 200 |
Yellow |
High |
2400 |
-65°-300°F
-54°-149°C |
80/25 |
190/95 |
220/105 |
470/200 |
860/350 |
1140/520 |
| 201 |
Yellow |
High |
2700 |
-65°-400°F
-54°C-204°C |
60/45 |
190/95 |
245/130 |
415/265 |
685/380 |
1200/900 |
| 202 |
Green |
Medium |
2200 |
-65°-300°F
-54°-149°C |
63/45 |
160/65 |
200/105 |
385/160 |
600/300 |
820/380 |
| 203 |
Silver |
Mild |
1800 |
50/30 |
120/60 |
160/75 |
280/130 |
480/140 |
540/340 |
| 204 |
Red |
High |
3100 |
80/60 |
220/180 |
280/250 |
470/340 |
860/600 |
1500/1400 |
|
Notes for Breakaway Torque,
Shear Strength, and Prevailing Torque Data:
- Values are typical of
batches; individual components may vary as much as ±25%.
Values listed are meant for comparative purposes only; consult
with us before designing, specifying or purchasing
Dri-Loc fasteners.
- Values obtained on Grade
5 bolts with phosphate and oil finish; Dri-Loc adhesive
coating was cured for 72 hours @ 70°F.
- For test data
on other fastener sizes and finishes, please contact
us.
Solvent Resistance
| |
%
Retention of Dri-Loc Product Codes 200-204 |
| Test
Temperature |
200 |
201 |
202 |
203 |
204 |
| Air
Reference |
188°F |
100 |
100 |
100 |
100 |
100 |
| Glycol/Water |
188°F |
100 |
100 |
95 |
40 |
100 |
| Isopropyl
Alcohol |
188°F |
100 |
100 |
100 |
65 |
95 |
| Gasoline |
188°F |
100 |
95 |
100 |
70 |
100 |
| 10W30
Oil |
188°F |
100 |
90 |
100 |
55 |
90 |
| Phosphate
Ester |
188°F |
100 |
90 |
100 |
100 |
100 |
| Toluene |
188°F |
100 |
95 |
100 |
60 |
100 |
| Air
Reference |
75°F |
100 |
100 |
100 |
100 |
100 |
| Water |
75°F |
100 |
100 |
100 |
100 |
100 |
| 10W30
Oil |
300°F |
80 |
100 |
90 |
30 |
80 |
| Automatic
Transmission Fluid |
300°F |
75 |
100 |
85 |
35 |
80 |
|
How to Specify
Dri-Loc coated fasteners
are produced to order by Long-Lok. We can process your supplied
parts, or we can supply complete products, including the
basic fastener.
To order Dri-Loc coated
fasteners, or to request a quote, please call
us and speak directly with one of our Sales Engineers.
Applicable Standards
Commercial Standards
IFI
125 and IFI 525
Loosening Torque
Please download
this page (45Kb Adobe Acrobat PDF file) for this information.
Staining
Dri-Loc adhesives are slightly
acidic and may stain or discolor some metals. However, the
effect on performance of the adhesive has been shown to be
inconsequential. Dri-Loc adhesives are not recommended for
use on copper or brass.
Material Safety
Skin Contact
Excessive or repeated
skin contact with the liquid anaerobic resin squeezed from
Dri-Loc treated fasteners may cause dermatitis in sensitive
persons. In case of skin contact, remove promptly by washing
with mild soap and water. In case of skin reaction, discontinue
contact with product. If skin reaction persists, see a physician.
KEEP MATERIAL AWAY FROM CHILDREN.
Material Safety Data
Sheets
Below are links to
the Dri-Loc material data sheets on the Loctite Corporation
web site. These are links to Loctite information, for which
Loctite (not Long-Lok) is responsible.
See for Yourself
Send us a sample of
your part or fastener, along with a brief description of
its application and performance requirements, and we’ll
process it using the most appropriate Long-Lok thread locking
or sealing method. Or, to sample a standard Long-Lok fastener,
simply supply us with a part number. Samples are provided
free of charge. Call your
nearest Long-Lok facility for assistance.
|
