The Ultimate Maintenance Guide for Your Kelly Bar
Vigorlink suggested you need to make the following as below
Kelly Bar Maintenance Checklist at a Glance
| Frequency | Key Actions | Tool/Method Needed |
| Daily | Visual inspection for major damage; Clean & lubricate threads | Wire brush, anti-seize compound |
| Weekly | Check straightness & flutes; Detailed thread audit; Grease fittings | Caliper, straight edge, grease gun |
| Monthly/Pre-Project | Measure wall thickness (UT); Check for micro-cracks (MPI); Verify torques | Ultrasonic thickness gauge, NDT kits, torque wrench |
| As-Needed | Repair damaged threads; Reface worn driving flats; Replace sections | Machining workshop, OEM spare parts |
Common Problems & Corrective Actions
· Thread Galling/Seizing: Almost always caused by improper cleaning or lubrication. If seized, do not force it. Use penetrating oil and specialized thread repair tools. Prevention is key.
· Excessive Wear on One Side: This usually indicates a bent bar or misalignment with the drill drive. Check straightness and equipment alignment.
· Cracks: Immediately stop using the bar. Cracks propagate and can lead to sudden, dangerous failure. Professional welding repair by a certified technician is required, following OEM guidelines.
COMPANY PROFILE
Hunan lifa is a high-fech enterprise specialising in the design, manufacture, and trade of constructionmachinery attachments, alongside professional foundation engineering construction. lts Vigorlink brand oiconsfruction machinery eauipment has achieved eridlised and industrialised production, The companyhas assembled a team of core technical personnel possessing extensive experience in mechanicalengineering and construction, underpinned by solid theoretical foundations, lt also maintains an after.sales service team with years of on-site maintenance expertise.
GG BUSINESS PHILOSOPHY AND CORPORATE MISSION
The company adheres to the business philosophy of ‘customer first, integrity as the foundation, professionaldesign, attentive service, and achieving the highest cost-performance ratio for products’. lt is committed toadvancing the globalisation and standardisation of construction machinery attachments worldwideLeveraging first-class management, cutting-edge technology, and state-ofthe-art manufacturing equipmentf strives to build a national brand and wholeheartedly provides the finest service to colleagues in the global construction industry.Official website address:https://vigorlink-global.com/
