Using the wrong oil grade is one of the most common causes of premature spindle bolster failure. This guide explains the ISO VG grading system, the DIN 51517-CLP specification, and exactly which grade each HF and HZ series type needs.
Vindex Industries manufactures precision spindle bolsters in Surendranagar, Gujarat, India — exported to 87 countries.
What Is DIN 51517-CLP?
DIN 51517-CLP is the German standard for high-grade circulating and spindle oils. It requires solvent-refined base oil with anti-wear, anti-oxidant and anti-corrosion additives. A typical compliant oil is Beruspin Highgrade 10 (= ISO VG 10).
ISO VG Grades Explained
| Grade | Viscosity at 40°C | Used For |
|---|---|---|
| VG 10 | ~10 cSt | High-speed HF inserts, HZ 33/44 |
| VG 22 | ~22 cSt | HZ 35/55/66/68/77 standard duty |
| VG 46 | ~46 cSt | HZ 66/68/77 heavy load |
| VG 68 | ~68 cSt | Suppressed balloon applications |
| VG 100 | ~100 cSt | HZ 55–77 suppressed yarn balloon |
Golden Rules
1. Never mix grades — drain completely before changing grade.
2. Thicker is not better — too thick oil at high speed causes overheating.
3. Suppressed balloon = heavier oil — HZ 55–77 with suppressed balloon heads need ISO VG 100.
4. Coat bearings at every change — coat the roller bearing thoroughly with fresh oil before service.
As a textile spindle manufacturer in India, Vindex Industries supplies the correct lubrication data with every bolster shipped to 87 countries.
Related oil-change reference
Use the combined HF and HZ spindle bolster oil-change guide to navigate the related maintenance references. Follow the selected insert and lubricant instructions for the actual service duty.
Frequently asked questions
What oil information is explained in this guide?
The guide explains DIN 51517-CLP, ISO viscosity grades and practical oil-selection rules for the spindle references discussed.
Is the viscosity grade enough to choose spindle oil?
Use the required grade together with the stated oil specification and the machine or insert instructions. Review the linked oil-change reference for the relevant type.