How deep should the spindle blade sit in oil? This chart gives the exact minimum and maximum immersion depths for every HZ series bolster. Running below minimum means dry running — overheating, blackened oil and twist failure.
Vindex Industries manufactures precision HZ series bolsters in India for mills in 87 export countries.
HZ Series Blade Immersion Depth (mm)
| Type | Max Depth | Min Depth |
|---|---|---|
| HZ 33 | 95 | 65 |
| HZ 35 | 100 | 70 |
| HZ 44 | 110 | 70 |
| HZ 55 | 125 | 90 |
| HZ 66 | 145 | 90 |
| HZ 68 | 145 | 90 |
| HZ 77 | 190 | 120 |
Blade immersion below the minimum = dry running: overheating, oil blackening, twist failure. Always keep the blade between the marks.
Vindex Industries manufactures HZ series spindle bolsters to original dimensions in Surendranagar, Gujarat — exported to 87 countries.
Frequently asked questions
Where can I find the HZ blade immersion reference?
Use the HZ series table on this page and select the row for the exact bolster type. Values are presented in millimetres.
Can an HF immersion value be substituted for an HZ type?
Use the table for the correct insert family and reference. The linked HF table is a separate reference and should not be substituted by appearance alone.