INDEPENDENT TESTING|AGRICULTURAL MACHINERY|DRIVE SHAFTS · UNIVERSAL JOINT CROSSES
IE S054PRELIMINARY TEST REPORT No. 01-07-2000-1
Tractor driveshaft: rated service life on a single grease pack
Wear of the universal-joint spider pins remained minimal, the shaft ran its service life without failures and stayed operational. 0–0.04 mm — cross journal side surface wear, single grease pack, 502 h (2000).
GREASING SCHEMESingle grease packone pack for the whole test period · control cross — Litol-24 replenished every 40 h
TEST OBJECTDriveshaft 31.12.25.1140.1455.13.13size 31 · drive from tractor PTO to the implement, 540 and 1000 rpm · JSC Chernihivavtodetal
DOCUMENT TYPEPreliminary test report
UkrNIIPIT, Ministry of Agrarian Policy of Ukraine
UkrNIIPIT, Ministry of Agrarian Policy of Ukraine
Key results
↓0–0.04mm
cross journal side surface wear, single grease pack, 502 h
| SHAFT ASSEMBLY | CONDITION AT START | WHAT WAS MEASURED |
|---|---|---|
| Cross with a single grease pack | New unit | Journal diameters in four sections, wear of side surfaces |
| Cross with Litol-24 every 40 h | New unit | Same — control cross of the same shaft |
| Telescoping assembly | New unit | Serviceability; greasing per schedule, every 70 h |
| End yokes and polymer safety guard | New unit | Condition per the final technical examination |
Cross journal wear over 502 hours of operation
| CROSS | GREASE | JOURNAL SURFACE WEAR |
|---|---|---|
| Cross 1 | Single pack, no replenishment | 0–0.04 mm |
| Cross 2, control | Litol-24, replenished every 40 h | 0.01–0.09 mm |
Both crosses belong to the same shaft: the same duty, the same 502 h, the only difference is the greasing scheme.
Cross journal diameters after 502 hours of operation
| JOURNAL · SECTION | SINGLE PACK, mm | LITOL-24 EVERY 40 h, mm |
|---|---|---|
| Journal 1 · 1.1 | 16.29 | 16.21 |
| Journal 1 · 1.2 | 16.30 | 16.29 |
| Journal 1 · 1.3 | 16.30 | 16.21 |
| Journal 1 · 1.4 | 16.30 | 16.26 |
| Journal 2 · 2.1 | 16.30 | 16.27 |
| Journal 2 · 2.2 | 16.30 | 16.29 |
| Journal 2 · 2.3 | 16.29 | 16.27 |
| Journal 2 · 2.4 | 16.30 | 16.29 |
| Journal 3 · 3.1 | 16.30 | 16.23 |
| Journal 3 · 3.2 | 16.29 | 16.29 |
| Journal 3 · 3.3 | 16.28 | 16.24 |
| Journal 3 · 3.4 | 16.29 | 16.28 |
| Journal 4 · 4.1 | 16.27 | 16.29 |
| Journal 4 · 4.2 | 16.29 | 16.29 |
| Journal 4 · 4.3 | 16.26 | 16.28 |
| Journal 4 · 4.4 | 16.29 | 16.29 |
Micrometry in four sections of each of the four journals of both crosses upon completion of the run.
Laboratory conclusion
The UkrNIIPIT testing laboratory recorded: the results of the preliminary tests of driveshaft 31.12.25.1140.1455.13.13 for rated service life under continuous rated loading with a torque of 450 N·m, a rotational speed of 16.7 s⁻¹ (1000 rpm) and an operating angle of 0.262 rad (15°) show that the rated service life of the tested driveshaft exceeded 500 hours, which meets the requirements of GOST 13758-89. No failures or malfunctions were noted during the tests; the final technical examination showed that the shaft is in serviceable condition. The side surfaces of the cross journals show minor wear in the direction of the forces from the load; at the same time, the journal surfaces of the cross periodically greased with Litol-24 oil wore more than the journal surfaces of the cross with a single grease pack.
Current equivalent
- Revitalizant gel for gearboxesGearboxes · transmissions · gear drives
- XADO “Restorative” greaseFriction pairs · joints
Cases for this unit:
Limits of this report: The results relate to driveshaft 31.12.25.1140.1455.13.13 of size 31 and to the UkrNIIPIT rig test conditions (450 N·m, 1000 rpm, operating angle 15°); under other loads and duty cycles, the figures may differ.