The Heidelberg 00.550.1661/ is consistently identified across parts lists and supplier catalogs as an idler roller or idler track roller bearing, with the technical designation LR608 NPPU. Some sellers also describe it as LR608-2RSR, which appears to be an equivalent bearing-style designation used in the trade rather than a different Heidelberg part number.
For SEO and search coverage, the main number variants found are: 00.550.1661/, 00.550.1661, and 005501661. These should be included in the title, description, and backend search fields because they are used across supplier and catalog references for the same part.
Technical specifications verified from sources
- Official/industry-used product type: Idler roller / idler track roller bearing.
- Heidelberg part number: 00.550.1661/.
- Searchable compact format: 005501661.
- Bearing designation: LR608 NPPU.
- Alternate seller wording: LR608-2RSR.
- Seller-listed dimensions: 24 mm x 7 mm x 8 mm hole. This dimension line appears in reseller listings and should be treated as supplier data unless confirmed against your internal technical drawing.
Documented compatibility
- QM46: this is the strongest documented compatibility. A Heidelberg QM parts catalog mirror lists 00.550.1661 Laufrolle LR 608 NPPU / Idler roller for QM46.
- SM102, CD102, CD74/XL75, XL105/106: these models appear repeatedly in supplier references for this same part number.
- Additional seller-listed applications include CX102, SX102, CS92, and XL145/XL162. Because these references come from aftermarket catalogs rather than a Heidelberg OEM fitment page surfaced in search, they should be presented as applications requiring technical verification.
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