IE B015TECHNICAL REPORT, JSC OK-LOZA, 2008
04-80063YuTS-KhD bearings: friction torque several times lower than on the standard grease
Friction torque dropped on all bearings in the batch, vibration level stayed within the same limits. 3.5× — batch average friction torque, 2.61 → 0.75 gf·cm (2008).
JSC OK-LOZA
Key result
| OBJECT | CONDITION AT TEST START | WHAT WAS MEASURED |
|---|---|---|
| Bearings 04-80063YuUTS21, 12 pcs | Standard ERA filtered grease, 10–20 mg per drawing | Friction torque, overall vibration acceleration level |
| The same 12 bearings, designation 04-80063YuTS-KhD | Washed, XADO “Protective - 60K” packed, 1–4 mg | Friction torque, overall vibration acceleration level |
Friction torque: the same 12 bearings before and after the grease change
| BEARING | STANDARD ERA F GREASE, gf·cm | XADO “PROTECTIVE - 60K” GREASE, gf·cm |
|---|---|---|
| No. 750 | 2.94 / 2.59 | 0.63 |
| No. 742 | 2.87 / 2.80 | 1.1 |
| No. 775 | 2.87 / 2.59 | 0.91 |
| No. 744 | 3.0 / 2.80 | 0.67 |
| No. 764 | 2.80 / 2.52 | 0.98 |
| No. 770 | 2.94 / 2.70 | 0.63 |
| No. 707 | 3.05 / 2.45 | 1.1 |
| No. 710 | 2.70 / 2.45 | 0.56 |
| No. 740 | 2.90 | 0.53 |
| No. 729 | 2.50 | 0.84 |
| No. 634 | 1.50 | 0.67 |
| No. 665 | 1.20 | 0.42 |
| Batch average | 2.61 | 0.75 |
SU17 test rig, n=15000 rpm, axial load A=(0.5+0.1) kgf. Friction torque decreased on all twelve bearings of the batch.
Overall vibration acceleration level across the batch
| MEASUREMENT STAGE | GREASE | AVG. VIBRATION LEVEL, m/s² |
|---|---|---|
| Before run-in | ERA filtered (standard) | 0.33 |
| After 15 min run-in | ERA filtered (standard) | 0.30 |
| After first 30 min run-in | XADO “Protective - 60K” | 0.35 |
| After second 30 min run-in | XADO “Protective - 60K” | 0.38 |
KZ-13 instrument, axial load A=(0.4+0.1) kgf. All readings for both greases stayed within 0.2–0.6 m/s².
Comparison background: friction torque on standard and imported greases
| GREASE | BEARINGS | AVERAGE FRICTION TORQUE, gf·cm |
|---|---|---|
| ERA filtered | 04-80063YuUT, 10 pcs | 2.9 |
| ERA unfiltered | 04-80063YuUT, 10 pcs | 4.3 |
| Chevron | 04-80063YuUT, 3 pcs | 4.9 |
A separate batch of bearings, 8 min run-in; XADO grease was not included in this comparison. On Chevron, two bearings showed unstable friction torque of ±2 gf·cm.
Report conclusions
Current equivalent
Revitalizant gel for compressors and bearings →
Piston, screw and centrifugal compressors; rolling and sliding bearings running in an oil bath; machine-tool spindle units and slideways.
How such units are treated:
Limits of this report: The results apply to 04-80063YuTS-KhD instrument rolling bearings and to the bench test modes of JSC OK-LOZA: n=15000 rpm at an axial load of 0.5 kgf; with other sizes and operating modes the figures may differ.