GALLOCK® - complete safety under heavy vibrations
Gala Precision Engineering announced the successful development and distribution of wedge lock washer GALLOCK®. These washers are used to safely secure bolted joints exposed to heavy vibrations and dynamic load.
Gallock washers are used in industries like energy generation (wind), off-highway applications, heavy vehicles, railways, transportation, construction, manufacturing and processing.
The number of industries that use Gallock washers is continuously growing.
Gallock washers are successfully tested and approved at Indian Railways. Gala is the first Indian company to get approval to supply wedge lock washers for LHB and ICF railway coaches.
GALLOCK consists of two flat washers having cam angled surfaces on one side and radial knurling over the other side. Radial knurling on outer side of washer locks radial movement. Cam angle on inner side is designed in such a way that cam angle is greater than bolts thread helix angle. If there is any movement along the joint, it will happen over the cam surfaces of washer. Cam surface will generate push out force within washer which leads to automatic increase of clamping force in opposite direction and prevents self-loosening.
Performance testing & validation
Junker test was carried out in reputed German institute, ‘IMA Dresden’. Gallock washers are proven under Junker Test according to DIN-65151 standards and certified that its conformity with the requirements of the Standard DIN 25201-4. It confirms that Gallock washers safely lock screws/bolt connections. The clamp force drop remains within acceptable limits even after 2,000 cycles and just a minimal amount of tension dissipates at the beginning of the test due to the normal settlement of the fastened joint.
Junker test at IMA Dresden confirms the performance of GALLOCK is at par with leading wedge lock manufacturers in Europe. List of other tests Gallock washers successfully tested and passed include:
- Coefficient of friction test as per ISO-16047.
- Sacrificial Cathodic Protection Test as per ISO-9227/ASTM-B117 for 72 hours.
- Salt Spray Test of Zinc flake surface coating as per ASTM-B117:2016 for 720 hours.
- Methyl Ethyl Ketone (MEK) rub test shows no chipping of coating after 30 rubbing cycles.
Gala Precision Equipment has in-house Junker testing facility to ensure the company supplies consistent high quality GALLOCK to its global customers. GALLOCK is offered with zinc flake coating to ensure long product life cycle and yielding up to 1,000 hours of salt spray life. The company also conducts special tests to ensure uniform coating thickness and secures adhesion of the coating on
the surface.
Core competency & operational excellence
The company’s 25 years of rich experience in blanking and forming technology, in-house tool design and development and the latest software has enabled its successful lunching of Gallock washers. Its high-capacity advanced technology forming presses deliver sharpness and consistency in profile, resulting in optimum performance of Gallock washers.
One of the company’s major technological competencies is its world-class heat treatment facility. It is fully controlled and automated process. Some of the key features are uniform homogeneous microstructure, decarburization-free surface, and no quenching cracks. This enables the company produce highly durable Gallock washers.
Operations at a glance
Gala has state-of-the-art manufacturing facilities and corporate office near Mumbai. Its plants are ISO-9001 and IATF-16949 certified, and has warehouse in China and branch offices in China and Germany. The company has technology tie-ups with global universities for continuous product and process improvements and validations. Today, Gala supplies its products to more than 300 customers across the globe.
(Communication provided by company)
A-303, Navbharat
Estates,
Zakaria Bunder Road,
Sewri (West), Mumbai - 400 015,
Maharashtra, India
+91-22-24193000
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