TECHNICAL REPORT|RAIL TRANSPORT|GEARBOX · GEAR DRIVE
TRKP GEARBOX No. 0935 TEST REPORT
TRKP wagon gearbox: teeth back to nominal, bearing play reduced
PRODUCTTreatment by XADO technologyrestoration of friction surfaces — gear drive and bearings
TEST OBJECTTRKP gearbox, serial No. 0935gear wheel dwg. 81.26.153 · pinion shaft dwg. 81.26.159 · ball bearings
DOCUMENT TYPETest report of the
plant commissioneight signatures, seal of Dneprovagonrembud JSC
plant commissioneight signatures, seal of Dneprovagonrembud JSC
Key result
↑6.7-15.4%
gear wheel tooth thickness at constant chord on the worn points, 3.5-3.9 → 4.04-4.16 mm
| GEARBOX COMPONENT | CONDITION BEFORE TREATMENT | WHAT WAS MEASURED |
|---|---|---|
| Gear wheel dwg. 81.26.153 | Tooth thickness 3.5-4.0 mm — worn below the drawing tolerance field | Tooth thickness at constant chord, five points |
| Pinion shaft dwg. 81.26.159 | Ran in mesh with the worn gear wheel | Tooth thickness at constant chord, seven points |
| Gearbox ball bearings | Play recorded | Radial clearance, commission inspection |
Gear wheel dwg. 81.26.153 — tooth thickness at constant chord
| MEASUREMENT POINT | BEFORE TREATMENT, mm | AFTER TREATMENT, mm | GAIN |
|---|---|---|---|
| Point 1 | 3.8 | 4.16 | +0.36 mm · +9.5 % |
| Point 2 | 4.0 | 4.06 | +0.06 mm · +1.5 % |
| Point 3 | 3.5 | 4.04 | +0.54 mm · +15.4 % |
| Point 4 | 3.86 | 4.14 | +0.28 mm · +7.3 % |
| Point 5 | 3.9 | 4.16 | +0.26 mm · +6.7 % |
Drawing nominal — 4.16 mm. Tooth thickness of the pinion shaft dwg. 81.26.159 after treatment — 3.98-4.16 mm at the same nominal.
Gearbox ball bearings — commission assessment
| COMPONENT | BEFORE TREATMENT | AFTER TREATMENT |
|---|---|---|
| Ball bearings of TRKP gearbox No. 0935 | Play recorded | Play reduced considerably against the initial measurements |
Wording of the commission following its inspection; the conclusion of the report records a reduction of the radial clearances in the ball bearings of this gearbox.
Commission conclusion
The commission of Dneprovagonrembud JSC recorded: “The results obtained on the restoration of TRKP gearbox No. 0935 by XADO technology show that this technology makes it possible to restore the tooth thickness of the gears to the parameters required by Repair Manual R 4684 RV, 1986, and also that the radial clearances in the ball bearings of this gearbox have been reduced”. The gearbox came in for testing with teeth worn below the tolerance field: the most worn point — 3.5 mm against the drawing value of 4.16 mm. That same point gave the largest gain, and the point that had kept its size gave the smallest: the coating builds up where the metal is worn away and stops at the drawing nominal.
The results relate to the TRKP wagon gearbox (gear wheel dwg. 81.26.153, pinion shaft dwg. 81.26.159) and to the test conditions at Dneprovagonrembud JSC; on other units and duty modes the figures may differ. The original report with signatures and seal is published in full and available for download.
Current equivalent
- Revitalizant gel for gearboxesGearboxes · transmissions · gear drives
- Revitalizant gel for compressors and bearingsCompressors · bearings · spindles
How such units are treated: