Joy 600128-716 Cutter Motor Rewind – 235 HP 950 V
Stator rewind and mechanical rebuild of the Joy 600128-716 cutter motor, with recorded IEEE tests.
In short
The Joy 600128-716 is a 235 HP, 950 V, 1,760 rpm AC cutter motor. 235 HP at 950 V is the cutter rating Komatsu publishes for 14CM15, 14CM09, 12CM15 and 12CM12 continuous miners, two motors per machine. TEMISA rewinds the stator with Class H form-wound coils, restores bearing fits, balances the rotor and releases it with recorded IEEE tests.
Joy 600128-716 nameplate data
| Part number | 600128-716 |
|---|---|
| Power | 235 HP |
| Voltage | 950 V |
| Speed | 1,760 rpm |
| Frequency | 60 Hz |
Application
Which continuous miners use the Joy 600128-716?
235 HP at 950 V, 60 Hz is the cutter rating Komatsu publishes for the 14CM15, 14CM09, 12CM15 and 12CM12 continuous miners, with two cutter motors per machine. This is a rating match: confirm the part number on your motor's nameplate or your machine's parts book.
Source: Rating: Davis Electric (Fairmont, WV) public Joy motor exchange inventory. Machine ratings: Komatsu product pages.
Scope of work
What we upgrade and what we never change
| What we upgrade | What we never change |
|---|---|
| Stator rewound with new form-wound coils | Explosion-proof enclosure |
| Class H insulation system | Flame-path surfaces and their dimensions |
| Varnish treatment with dehydration and controlled oven cure | Lead entrances |
| Bearing fits restored to ANSI/EASA AR100 tolerances | Mounting and shaft dimensions |
| New bearings, induction-mounted, and new seals | Nameplate rating: HP, voltage and speed stay as built |
| Rotor dynamically balanced | |
| Temperature sensors (RTDs) tested |
Enclosure dimensions are not modified. Before a rebuilt explosion-proof motor goes back underground, the mine's qualified electrical person inspects it, as MSHA regulations require.
Release tests
Which tests does every rewound motor pass?
| Test | Standard | Acceptance |
|---|---|---|
| Winding resistance, phase to phase | IEEE Std 1415 | Unbalance < 3% |
| Insulation resistance, 1 min | IEEE Std 43 | > 100 MΩ |
| Polarization index and dielectric absorption | IEEE Std 43 | PI > 2.0 · DAR > 1.5 |
| Step-voltage DC high-potential | IEEE Std 95 | > 100 MΩ, leakage < 1 mA |
| Surge comparison (turn-to-turn) | IEEE Std 522 | EAR L-L < 3% · P-P < 10% |
| Core loop test with thermography | Shop procedure | Uniform core temperature |
| Rotor growler test | Shop procedure | No open bars |
| Dynamic balance of rotor | ISO 21940 | Residual unbalance recorded |
| 60-minute run test: current, temperature, vibration | Shop procedure | Vibration < 0.11 in/s |
Other Joy cutter motors
Request for quotation
Send the nameplate and the failure
A photo of the nameplate and a line about the failure are enough to start. You get a technical answer first, then the quotation.
- Answered by an engineer, in English.
- Every motor returns with its recorded test data.
Or email ventas@temisa.mx or call +52 33 3614 2460 (Mexico, Central Time).