K20008XP0 is the KAYDON reference for LYDL PX20008, an open 200 × 216 × 8 mm four-point contact bearing. This model combines a 200 mm bore with an 8 mm section.
For a large-opening rotary fixture, identify where the payload and process forces act relative to the bearing plane. Central clearance, axial load and overturning moment need separate definitions. A payload mass alone is not a complete selection input.
Send a loaded assembly sketch, the required central passage and the operating sequence for a PX20008 engineering review and quotation.
K20008XP0 is the catalog reference for LYDL PX20008 open, a metric four-point contact bearing in a 200 × 216 × 8 mm envelope. LYDL supplies the bearing to the agreed order specification; reference data is used for comparison rather than as proof of identical performance.
The 200 mm bore makes this size relevant to layouts with a substantial central opening. The principal selection task is to describe the load path around that opening, especially when the workpiece or tooling acts away from the axis.
The reviewed KAYDON metric table confirms this open model but provides no verified sealed counterpart for the 200 × 216 × 8 mm envelope. If integral seals are required, request an assessed LYDL design; no J-number or PX20008UU supply identity is asserted here.
| Specification | LYDL PX20008 |
|---|---|
| Bore, d | 200 mm |
| Outside diameter, D | 216 mm |
| Width, B | 8 mm |
| Radial section | 8 mm |
| Construction | Open, four-point contact Type X |
| LYDL catalog mass | Approximately 0.22 kg |
| Reference model | KAYDON K20008XP0 |
| Sealed counterpart | Not verified in the official sources reviewed |
See the LYDL metric Type X listing for the catalog grouping. Confirm the actual material, internal setting and lubrication on the supply drawing.
Start with a sketch showing the bearing plane, rotation axis, payload center of gravity and every significant applied force. Mark which elements rotate and which remain fixed. This is more useful for selection than a total machine weight without its geometry.
Create separate operating cases for loading the fixture, moving it and performing the process. A force that is absent during rotation may dominate while the fixture is stationary. Include abnormal but required design cases, such as an emergency stop, using the machine designer's specified assumptions.
Where a force acts at an offset, calculate its moment using the appropriate perpendicular distance and the actual load direction. Do not multiply an arbitrary overall dimension by the payload weight. Use a consistent coordinate system so radial force, axial force and overturning moment refer to the same bearing location.
Send the resulting load cases with the required life and positioning behavior. The catalog values support an initial comparison, while the application assessment determines whether the selected LYDL configuration is suitable.
Request a PX20008 application and drawing review.
The following values describe KAYDON K20008XP0, not certified LYDL performance.
| Catalog rating | Dynamic | Static |
|---|---|---|
| Radial | 9,728 N | 20,055 N |
| Axial | 15,573 N | 50,141 N |
| Moment | 759 N·m | 2,086 N·m |
These limits are not simultaneous. The dynamic basis is one million revolutions of L10 life; static values assume rigid ring support. Obtain the LYDL rating basis before calculating application life. The LYDL series table labels force capacities in “kg”; this page does not silently reinterpret those entries as newtons.
The open reference table does not provide a model-specific speed limit here. Request the permitted operating conditions for the LYDL lubricant, internal setting and mounting arrangement; do not borrow a sealed model's speed figure.
One possible arrangement is a workholding fixture that leaves space through its center for a tool or process interface. The bearing supports the annular structure around that passage. The finished opening depends on the hub and support walls, not only on the nominal bore.
Assess the fixture with its most unfavorable allowed workpiece location. Also examine loading and unloading, when an operator or handling device can apply a force at a different position from the normal process load. Define the required cases without assuming that the payload is always centered.
Measure the behavior where the process acts. A small angular change at the bearing can have a different practical effect at a remote workpiece feature. Record the measurement location and loading arrangement whenever a prototype result is used for acceptance.
Review how the inner and outer rings are supported around their circumference. Identify interruptions caused by cutouts, lubrication passages or assembly access. Confirm that the supporting parts can transmit the specified loads to the base without introducing an unreviewed change in alignment.
Plan handling so the bearing is supported while it is moved into position. Avoid using a loose ring as a handle for the rest of the assembly. Keep the intended locating faces visible long enough to inspect their seating before the covers hide them.
For the open PX20008, define the external protection and lubricant arrangement as part of the same section drawing. A central passage can provide an unexpected route for chips, dust or cleaning fluid. Review that route through all machine positions, including any service orientation.
Complete a loaded sample check with the specified base attachments and the representative fixture installed.
Use PX20008 — Open for LYDL purchasing. The verified KAYDON reference is K20008XP0; no sealed counterpart is assigned.
KAYDON K means steel construction without seals or shields; J means steel construction with two nitrile seals. X identifies four-point contact, P a standard snap-over separator, and 0 Kaydon class 1 / ABEC 1F. These codes do not certify the LYDL configuration.
Separate catalog naming from confirmed availability. Schaeffler’s CSXU050-2RS is a verified sealed example in a different size. NSK uses NBX for inch-design four-point bearings and DD for two-sided sealing. These conventions provide no evidence of a sealed KAYDON counterpart for this 200 × 216 × 8 mm envelope.
Specify the force, direction and application point for each performance test. Record the angular position of the fixture and whether the drive holds position during measurement. These details are essential when comparing a supplier calculation with a machine test.
Keep inspection results for the bearing separate from those for the hub, fixture and complete axis. If total movement exceeds the requirement, the record should help identify which interface needs investigation. A single final displacement number rarely provides enough information for diagnosis.
Request bearing identification and an agreed inspection scope with the delivery. Confirm how the open bearing will be protected between unpacking, lubrication and final enclosure assembly.
No. Specify the center of gravity, force locations, process loads and motion conditions. Two fixtures carrying the same mass can impose different bearing loads because their offsets and support arrangements differ. Supply a load sketch with the operating cases.
They act about different axes and must be identified separately. Overturning moment tends to tilt the supported assembly, while drive torque rotates it about its working axis. Use a labeled coordinate sketch so the quotation and load calculation cannot confuse them.
No. The hub and other structural parts normally reduce the available passage. Check the finished opening in the full assembly and include clearance for moving tools or services. The bearing bore remains a mounting dimension.
Those operations may introduce forces or offsets not present during the normal cycle. Describe the handling method and any allowed contact with the fixture. Include the cases required by the machine specification rather than treating steady operation as the only condition.
Identify the measurement radius, reference surface, applied load and angular positions. State whether the drive and process hardware are installed. This makes the result interpretable and prevents comparisons between tests performed on fundamentally different assemblies.
Review PX15008 when a smaller seat can satisfy the passage requirement. For the same 200 mm bore with a 13 mm section, compare PX20013 and account for the changed outside diameter and axial space.
K15008XP0 / J15008XP0 — 150 × 166 × 8 mm · K20013XP0 — 200 × 226 × 13 mm
Attach a coordinate sketch, payload offsets, process-force cases and the minimum finished passage. Add motion conditions, required life and the acceptance test used at the workpiece.
Send your PX20008 inquiry and drawing.
The documents below support the reference data and naming examples, not LYDL certification or guaranteed interchangeability.
