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Deep Groove Ball Bearings: The Industry Default and When to Reach for Something Else
If you pulled a bearing off general industrial equipment at random, there’s a good chance
Availability:
1 in stock
Incremental rotary encoder, 2540 lines/rev, 11 µApp sinusoidal output, 10 mm solid shaft, IP67, 12,000 rpm mechanical, 5 V supply, one reference mark.
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| MFR / Brand | Heidenhain |
|---|---|
| MPN | 251 568-1N |
| Model | 251-568-1N |
| Type | Rotary Encoder |
|---|---|
| Base Number | 251568 |
| Common Misspellings | Heidenhein, Heidenhain, Hiedenhain, Heidenhan, ROD450 2540, ROD 450 2450, 251568 1N, 251-568 IN, 251 568-IN, Heidenhain ROD brand |
| Shaft Type | 10 mm solid shaft |
| Mpn Variants | ROD 450, ROD-450, ROD450, ROD 450-2540, ROD-450-2540, ROD4502540, 251568-1N, 251 568-1N, 251-568-1N, ID 251568 |
| Manufacturer Status | Discontinued. The ROD 1000 series is the current-generation HEIDENHAIN family. |
| Compatible With Replaces | Controls, counters and position displays with an 11 µA peak-to-peak sinusoidal current input. HEIDENHAIN EXE interface unit converts the output to TTL square wave. |
| Nominal Rated Input Voltage | 5 V DC ±0.5 V |
| Part Number | 251 568-1N |
| Mounting Type | Flange mount with integral bearing, separate rotor coupling |
| Communication Standard | 11 µA peak-to-peak sinusoidal current (analogue incremental); TTL requires external HEIDENHAIN EXE interface |
| Maximum Speed | 12,000 rpm mechanical |
HEIDENHAIN ROD 450 incremental rotary encoder, 2540-line build, HEIDENHAIN ID 251 568-1N. Type: bearing-mounted incremental rotary encoder. The shaft runs in integral bearings inside the housing and joins the driving shaft through a separate rotor coupling, which absorbs axial movement and radial and angular misalignment between the two shafts.
ROD 450 — HEIDENHAIN bearing-mounted incremental rotary encoder, ROD 400 family.
2540 — line count: 2540 lines per revolution.
251 568 — HEIDENHAIN base ID of the ROD 450.
-1N — variant code for this build. The two-character suffix encodes line count, signal type, connection type and cable length. Sibling variants on the same base ID: 251 568-78 is the ROD 450-1000 and 251 568-4F is the ROD 450-1800.
Also marked: ROD 450, ROD-450, ROD450, ROD 450-2540, ROD-450-2540, ROD4502540, 251568-1N, 251 568-1N, 251-568-1N and ID 251568.
Output Signal: 11 µA peak-to-peak sinusoidal current. The encoder drives controls, counters and position displays with an 11 µA sinusoidal input. A HEIDENHAIN EXE interface unit converts the sinusoidal current to TTL square-wave pulses. A sinusoidal output can be electronically interpolated, giving resolution finer than the 2540 lines per revolution of the disc.
Line Count: 2540 lines per revolution. Reference Mark: one. Supply Voltage: 5 V ±0.5 V. Cutoff Frequency: 160 kHz at −3 dB. Maximum Speed: 12,000 rpm mechanical. At 2540 lines the 160 kHz cutoff corresponds to about 3,800 rpm electrical. Protection Class: IP67. Operating Temperature: −40 °C to +100 °C. Shaft: 10 mm diameter solid shaft.
Mounting: flange mount with integral bearing, driven through a separate rotor coupling. Shaft: 10 mm diameter solid.
Unit Quantity: 1 encoder. Rotor coupling: separate HEIDENHAIN item.
Discontinued HEIDENHAIN model. The current-generation HEIDENHAIN family for this class of encoder is the ROD 1000 series.
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