JU070CP0 sealed radial contact bearing measures 177.8 × 196.85 × 12.7 mm and is listed as LYDL-070UU in the Sealed Type C series. Its double-sealed reference design suits evaluation of radial supports where grease retention and contaminant exclusion matter. Specify dust, liquid, cleaning and temperature exposure separately. Request the actual LYDL seal and lubricant configuration rather than assuming that “sealed” establishes an environmental rating.
JU070CP0 sealed radial contact bearing is a seven-inch Type C reference with a 177.8 × 196.85 × 12.7 mm envelope. It provides a starting point for assessing a radial support that must operate near dust or process debris.
Bearing seals are only one part of contamination control. The housing, cleaning method, storage process and surrounding airflow determine what reaches the seal area. Define these conditions before selecting lubricant and sealing details.
| Dimension | Inches | Millimeters |
|---|---|---|
| Bore, d | 7.000 | 177.800 |
| Outside diameter, D | 7.750 | 196.850 |
| Width, B | 0.500 | 12.700 |
| Radial section | 0.375 | 9.525 |
The bearing occupies 9.525 mm radially and 12.7 mm axially. Any additional guard, labyrinth or collection space belongs outside that envelope. Check that protective hardware leaves adequate clearance and does not touch a rotating ring or bearing seal.
The LYDL Sealed Type C parameter table lists LYDL-070UU for this size and a catalog mass of 0.422 kg. Include Sealed Type C when ordering: LYDL uses UU references in more than one bearing family. Confirm the complete supply designation on the quotation.
Name the contaminant and how it reaches the support. Dry fibers, fine abrasive dust, occasional splashes and directed cleaning jets are different exposures. State concentration or frequency where known, and distinguish normal operation from cleaning, maintenance and storage.
Avoid a specification that says only “dustproof” or “waterproof.” Those terms do not define a test or acceptance level. If the machine requires an enclosure protection rating, establish it for the complete enclosure through the applicable design and test process; it cannot be inferred from the bearing designation.
| Exposure | Information to include in the inquiry |
|---|---|
| Dry process dust | Particle type, amount and access path |
| Liquid splash | Fluid identity, temperature and frequency |
| Cleaning operation | Chemical, pressure, direction and dwell time |
| Storage or transport | Humidity, duration and packing conditions |
Discuss supplementary protection where the bearing would otherwise receive direct contamination. A properly positioned guard may address an exposure path more effectively than changing the bearing alone. Evaluate drainage and debris accumulation so the protective arrangement does not retain contamination against the seal.
Send the JU070CP0 exposure and cleaning conditions for review.
| Parameter | KAYDON JU070CP0 reference | LYDL-070UU Sealed Type C listing |
|---|---|---|
| Dynamic radial, Kaydon method / LYDL Cr | 6.481 kN (1,457 lbf) | 6.980 kN; basis not stated in the table |
| Dynamic radial, ISO comparison | 12.557 kN (2,823 lbf) | Not separately stated |
| Static radial | 15.791 kN (3,550 lbf) | 15.790 kN |
| Listed limiting speed | 920 rpm, subject to catalog conditions | 920 rpm, subject to supply confirmation |
Kaydon values describe the Kaydon bearing, not tested LYDL performance. Its dynamic ratings use a one-million-revolution L10 basis; the ISO column is identified as an ISO 281:1990 comparison. Static ratings assume rigid support. The listed speed applies at loads up to 20% of dynamic capacity. Do not combine the columns or apply these limits simultaneously without the appropriate selection analysis.
LYDL's published dynamic radial value differs from the Kaydon method and ISO-comparison figures shown here. None of those ratings certifies performance in abrasive dust or cleaning chemicals. Load selection and environmental suitability need separate confirmation for the quoted configuration.
Kaydon's J designation identifies its standard steel bearing with two nitrile seals. That code does not establish the material of every LYDL seal, nor an IP rating, vacuum suitability or food-contact approval. Ask for the seal material and lubricant identity that will actually appear on the LYDL order specification.
A handling roller can be protected during production yet exposed when covers are removed for cleaning. Describe both states, including whether cleaning fluid can collect near a ring face. Keep abrasive debris away from the support during belt replacement or nearby machining.
The example assumes a design review, not a qualified contamination level. Select the housing protection, bearing configuration and maintenance method together. A clean exterior at one inspection does not prove that the original exposure requirement was adequately defined.
Leave the bearing in protective packing until the assembly area is ready. Use clean tools and a suitable installation method that avoids damage to the ring and seal edges. Do not direct compressed air at the bearing in a way that drives debris into sealing interfaces or spins the bearing uncontrolled.
Keep solvents and cleaning agents away from the seals unless compatibility has been approved. If relubrication or a grease change is proposed, obtain a procedure for the supplied design. Do not mix greases or pry out seals solely to make maintenance more convenient.
| Brand | Verified reference | Meaning and comparison limit |
|---|---|---|
| KAYDON | JU070CP0 | Sealed JU series, radial contact Type C. |
| INA / Schaeffler | CSCU 070.2RS | CSC: deep-groove radial family; U: section series; .2RS: seals on both sides. |
KAYDON uses JU070CP0 for its sealed radial reference: J identifies standard steel with two nitrile seals; C identifies radial contact; P is a separator code; and the final 0 is Kaydon precision class 1, associated with ABEC 1F. The ending CP0 must not be read as a universal ISO P0 accuracy designation.
These references share the nominal 177.8 × 196.85 × 12.7 mm envelope. Fits, internal clearance, seals, accuracy and rating methods still require a manufacturer-specific comparison before replacement.
Agree the relevant inspection or exposure test and its acceptance criteria. Where a machine test is required, define contaminant, duration, loading, speed and post-test examination. Identify who approves any change in seal material, grease or protective housing.
For incoming inspection, check identity, packaging condition and specified bearing characteristics using clean handling. The packing collage illustrates general processes; it is not a certificate for a particular environmental requirement. Keep actual material declarations and inspection records linked to the order and batch.
Not by designation alone. Pressure, nozzle direction, fluid chemistry and housing protection all affect the exposure. Obtain approval for the complete arrangement or provide external protection and a suitable cleaning procedure.
No. A bearing seal designation is not an enclosure protection classification. State the machine-level requirement and the relevant verification method rather than assigning an unsupported rating to the bearing.
That requires separate assessment of materials, lubricant, outgassing or particle requirements and operating conditions. Ordinary grease retention is not evidence of vacuum compatibility or a cleanroom classification.
Only under an approved maintenance procedure for the supplied configuration. Grease compatibility, fill quantity, cleanliness and seal integrity must be considered. An improvised refill can change both friction and protection.
Document its location and likely access path before cleaning. Retain the exposure conditions, operating cycle, protective-housing details and lubricant specification. This supports an investigation of the complete sealing arrangement rather than an assumption based on appearance alone.
JU060CP0 and JU080CP0 use six-inch and eight-inch bores. They provide different seat envelopes, not different environmental protection classes by virtue of size. Carry the same exposure description into any comparison within the sealed radial contact range.
Specify JU070CP0 / LYDL-070UU / Sealed Type C and provide the exposure record, cleaning method, temperature, speed, loads and quantity. Request written confirmation of the proposed seals, grease and any application-specific validation.
Request the JU070CP0 supply specification and quotation.
These sources document manufacturer reference products and their catalog methods; they are not LYDL certifications.
