Through-bore slip rings
Moog Endura-Trac Standard W Series
Low-speed modular through-bore slip ring in 1.5 or 3.0 inch bores with an all-metal dust cover and open-frame option.
Key specifications
| Circuits (max) | 36 |
|---|---|
| Current per circuit (max) | 30 A |
| Voltage (max) | 600 V |
| Speed (max) | 60 rpm |
| Bore | 38.1–76.2 mm |
| Outer diameter | 127–165.1 mm |
| Temperature | -20–80 °C |
Summarised in our own words from Moog Inc.'s published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1 · Source 2 · Source 3
Notes on this data
Up to 12 power (30 A, 600 VAC) + 24 signal (5 A, 250 VAC); circuits_max is the sum.
Specify Motion is not affiliated with Moog Inc.. Moog and Endura-Trac Standard W Series are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
Alternatives that meet or exceed these figures
Engineers often come to us with a Moog part number and leave with an alternative that is easier to source, quicker to deliver or a better fit for the machine. These series from our supply network is the closest match on published figures.
Through-bore slip rings with a hollow centre so shafts, pipes or cables can pass through, carrying power, signal and fieldbus data. Standard bores run from 12.7 mm to 100 mm and custom bores are offered.
| Published maximum | Endura-Trac Standard W Series | ER Series Through Bore Slip Ring |
|---|---|---|
| Circuits | 36 | 24 |
| Current per circuit | 30 A | 15 A |
| Speed | 60 rpm | 300 rpm meets or exceeds |
| Voltage | 600 V | 380 V |
| Bore | 76.2 mm | 100 mm meets or exceeds |
Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
Other through-bore slip rings series
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