YRT80 Rotary Table Bearing for Compact CNC and Indexing Axes
The LYDL
YRT80 rotary table bearing is an
80 × 146 × 35 mm axial/radial roller bearing in the
YRT rotary table bearing range. Its two axial roller rows and one radial roller row support combined loading in a compact assembly.
Compared with YRT50, YRT80 adds 30 mm of bore diameter while increasing the outside diameter by 20 mm and height by 5 mm. This dimensional balance can suit larger shaft or hub layouts within a compact rotary axis.
YRT80 Dimensions and Mounting Data
Values below follow LYDL’s published YRT80 table. The approved order drawing defines the final tolerances and mounting details.
| Parameter | LYDL YRT80 |
|---|
| Bore × outside diameter × height, d × D × H | 80 × 146 × 35 mm |
| Mounting heights, H1 / H2 | 23.35 / 11.65 mm |
| Outer-ring width, C | 12 mm |
| Inner-ring outside diameter, d1 | 130 mm |
| Inner-ring fixing-hole pitch circle, dn | 92 mm |
| Outer-ring fixing-hole pitch circle, dm | 138 mm |
| Inner-ring fixing holes | 10 × Ø5.6 mm |
| Inner-ring counterbore diameter / depth, ds / Ts | Ø10 / 4.2 mm |
| Outer-ring fixing holes | 12 × Ø4.6 mm |
| Accuracy options | P5 / P4 / P2; acceptance limits agreed with the order |
| Bearing-steel options | GCr15 / GCr15SiMn / 100Cr6; specify the selected grade |
| Lubrication | Grease; type and quantity selected for the application |
INA/Schaeffler YRT80-TV Reference Performance
These are manufacturer-specific catalog values. LYDL’s public table does not provide corresponding YRT80 performance ratings; request LYDL data for the quoted configuration before completing load, life or drive calculations.
| Reference parameter | INA/Schaeffler YRT80-TV |
|---|
| Basic dynamic axial load rating, Ca | 38 kN |
| Basic static axial load rating, C0a | 158 kN |
| Basic dynamic radial load rating, Cr | 44 kN |
| Basic static radial load rating, C0r | 98 kN |
| Limiting speed, nG | 350 rpm, under catalog test conditions |
| Frictional torque guide value, MR | 3 N·m, measured at 5 rpm |
| Mass | 2.4 kg |
| Standard fitted-bearing axial/radial runout | 3 µm with ideal adjacent construction |
Catalog limiting speed was determined without external application load under defined lubrication, mounting and thermal conditions. The friction figure is a bearing guide value; motor sizing must include acceleration, inertia and external torque.
Published differences: LYDL specifies 4.2 mm counterbore depth; the reference catalog gives 4.0 mm. LYDL’s series temperature listing is −20°C to +120°C, compared with −30°C to +100°C in the reference catalog. Confirm both the mounting geometry and operating temperature for the ordered configuration.
Need the YRT80 drawing and application ratings? Request a YRT80 technical review and quotation. Include your mounting section, loads, load offsets, speed, duty cycle, runout target and quantity.
Applications for YRT80
Consider YRT80 where an 80 mm bearing bore and compact installation envelope suit the machine layout:
- CNC rotary tables: compact workholding axes with shaft or hub space requirements.
- 4- and 5-axis equipment: appropriately sized swivel and positioning assemblies.
- Precision indexing: assembly fixtures combining repeated positioning with controlled deflection.
- Measuring equipment: rotary stages requiring specified radial and axial runout.
Selection depends on the complete load case, including workpiece offset and machining forces.
Comparing Nearby YRT Sizes
These dimensions support layout selection. Compare the actual axial, radial and moment-load requirements separately.
YRT, YRTS, YRTM and ZKLDF: What Changes?
| Family / example | Design purpose | Implication for a YRT80 project |
|---|
| YRT80 | Axial/radial roller support for precision rotary and indexing axes | Base envelope: 80 × 146 × 35 mm |
| YRTS, such as YRTS200 | Roller-bearing series developed for higher-speed operation | LYDL lists YRTS200 at 200 × 300 × 45 mm; an 80 mm version requires separate confirmation |
| YRTM, such as YRTM150 or YRTM200 | Bearing system incorporating angular measurement | Confirm the bearing drawing, encoder interface and system accuracy; LYDL’s published model list does not include YRTM80 |
| ZKLDF100 | Double-direction angular contact ball bearing for rotary axes with higher-speed requirements | The referenced catalog size is 100 × 185 × 38 mm; shaft, housing and mounting interfaces require redesign |
Availability matters: YRTS80 and YRTM80 are not established standard options in the cited published data. Specify the required speed or feedback function so the bearing and machine layout can be reviewed together.
The cited ZKLDF table starts at
ZKLDF100. It is an alternative bearing concept for a redesigned axis, rather than a direct replacement for YRT80. Its suitability still requires load, stiffness and thermal checks.
YRT80 Designations and Assembly Requirements
LYDL uses
YRT80 as the base model. INA/Schaeffler’s
YRT80-TV designation uses
TV for a glass-fibre-reinforced polyamide 66 cage. Confirm LYDL’s cage material when requesting a replacement or matching an existing specification.
In the reference naming system,
VSP concerns an axially supported L-section ring and its preload arrangement;
PRL50 identifies restricted runout tolerances. Include the full existing designation and numerical acceptance limits when ordering.
Use the approved mounting sequence and screw torques. Check assembled runout and rotational resistance, and provide lubrication access and protection from coolant, chips and dust.
Inspection and Protective Packaging
Specify the checks required for your order: boundary dimensions, fixing-hole geometry, radial and axial runout, rotational resistance and relevant material records. Agree the measurement conditions and report scope with the quotation.
For wooden-case packing, the bearing is laid flat on cushioning with rust-preventive wrapping. Protective bands secure the wrap, while suitable blocking limits movement inside the case. The external label identifies the ordered model and quantity.
YRT80 FAQ
Are the inner- and outer-ring fixing holes the same size?
No. LYDL lists 10 inner-ring holes at Ø5.6 mm and 12 outer-ring holes at Ø4.6 mm. These are fixing-hole diameters, not thread-size designations. Confirm screw diameter, length, strength class and tightening torque against the approved assembly drawing.
Why should I check H1 and H2 when replacing YRT80?
The 23.35 mm and 11.65 mm mounting heights locate the outer-ring contact surfaces within the axial stack. Check both against the mating parts, together with the 35 mm overall height. Determine spacer and shoulder dimensions from the section drawing.
Does YRT80 have higher load ratings than YRT50 in every direction?
No. In the same brand reference catalog, YRT80-TV has a dynamic axial rating of 38 kN versus 56 kN for YRT50, while its dynamic radial rating is 44 kN versus 28.5 kN. Select by the individual load components and combined-load assessment.
Can YRT80 be used with an external angular encoder?
Yes, as part of a suitably designed rotary axis. An external encoder provides a separate feedback system; its mounting, alignment and accuracy must be coordinated with bearing runout and machine stiffness. This is a design option when an integrated measuring-bearing arrangement does not suit the available space.
What information is needed for small-angle oscillating operation?
Provide the oscillation angle, cycles per minute, dwell time, load and mounting orientation. Small-angle movement needs a lubrication review because grease redistribution differs from continuous rotation. Agree the lubricant, fill quantity and relubrication plan for the actual cycle.
Request a YRT80 Rotary Table Bearing Quote
Request YRT80 pricing and a technical drawing. Send the quantity, delivery requirement and mounting drawing. For replacements, include the complete existing bearing code; for new designs, add the required accuracy, load case and operating cycle.
Engineering Standards and References
Brand figures provide comparison data. The approved LYDL specification defines the supplied product; standards references describe rating and tolerance frameworks.
- INA/Schaeffler: YRT80-TV product data and TPI 120 — Precision Bearings for Combined Loads, including YRT designations, operating conditions and the YRT/ZKLDF dimensional tables.
- ISO 281:2007 — dynamic load ratings and rating life.
- ISO 76:2006 — static load ratings.
- ISO 492:2023 — radial-bearing geometrical specifications and tolerance values.
