Certified interchangeability
- Matching model designation and installation envelope
- Reviewed mounting-hole and bolt-circle interfaces
- Gear arrangement matched to the referenced configuration
MERYDOM 81-50 2987/2-06940
Level 3 VerifiedFactory-certified by MERYDOM to interchange with IMO 81-50 2987/2-06940. The MERYDOM product uses the same model designation for direct cross-reference.
MERYDOM BRAND · CERTIFIED REPLACEMENTCertified product dataView complete specifications ↓ Factory assurance
81-50 2987/2-06940
MERYDOM VerifiedEngineering certification · Rev Rev 1.0MERYDOM-manufactured slewing bearing certified for interchange with IMO 81-50 2987/2-06940.
- Overall OD (Do)
- 3290.4 mm
- Overall ID (di)
- 2820 mm
- Overall height
- Not published
- Gear arrangement
- External gear
- Mounting holes
- 66 / outer / inner
- Bearing design
- Double axial ball
- Certified dimensional interchange
- MERYDOM controlled materials
- Factory documentation available
PRODUCT DIMENSIONS
View complete specifications ↓Published dimensions and interfaces
Every available catalog dimension, mounting interface and gear value is shown here in the original published unit.
Dimensions
- Overall outside diameter (Da)
- 3290.4 mm3,290.4 mm
- Overall inside diameter (di)
- 2820 mm2,820 mm
- Assembly weight (G)
- 2288 kg2,288 kg
Mounting
- Outer ring bolt circle (La)
- 3130 mm3,130 mm
- Inner ring bolt circle (Li)
- 2880 mm2,880 mm
- Outer ring mounting-hole count (na)
- 66
Gear
- Gear pitch diameter (d)
- 3240 mm3,240 mm
- Gear module (m)
- 18 mm
- Gear tooth count (z)
- 180
- Addendum modification coefficient (x)
- +0.500.5
MERYDOM CERTIFIED SPECIFICATION
MERYDOM Factory Verified · Rev Rev 1.0Product specifications
MERYDOM product identity, certification, materials and dimensional data for the certified replacement.
| Technical parameter | MERYDOM certified product value |
|---|---|
| MERYDOM Certified Product | |
| Product brand | MERYDOM |
| MERYDOM model | 81-50 2987/2-06940 |
| Certified interchangeable with | IMO 81-50 2987/2-06940 |
| Factory verification | Level 3 · Engineering Verified |
| Approved drawing revision | Rev 1.0 |
| Reviewed by | MERYDOM Engineering Department |
| Certification date | 2026-08-16 |
| Materials | |
| Ring material options | 42CrMo / 50Mn |
| Seal material | NBR · Nitrile rubber |
| Spacer material options | Engineering nylon / Brass |
| Identification | |
| Reference brand | IMO |
| Series | 850 Series |
| Reference model | 81-50 2987/2-06940 |
| System of measurement | Metric |
| Bearing structure | Double axial ball |
| Gear arrangement | External gear |
| Dimensions | |
| Overall outside diameter (Da) | 3290.4 mm3,290.4 mm |
| Overall inside diameter (di) | 2820 mm2,820 mm |
| Assembly weight (G) | 2288 kg2,288 kg |
| Mounting | |
| Outer ring bolt circle (La) | 3130 mm3,130 mm |
| Inner ring bolt circle (Li) | 2880 mm2,880 mm |
| Outer ring mounting-hole count (na) | 66 |
| Gear | |
| Gear pitch diameter (d) | 3240 mm3,240 mm |
| Gear module (m) | 18 mm |
| Gear tooth count (z) | 180 |
| Addendum modification coefficient (x) | +0.500.5 |
| Ratings | |
| Permitted circumferential force, normal (fz_norm) | 227 kN |
| Permitted circumferential force, maximum (fz_max) | 403 kN |
| Static radial load rating (Co_rad) | 3424 kN3,424 kN |
| Static axial load rating, tension (Co_ax_T) | 17019 kN17,019 kN |
| Static axial load rating, compression (Co_ax_H) | 14062 kN14,062 kN |
| Dynamic radial load rating (C_rad) | 749 kN |
| Dynamic axial load rating, tension (C_ax_T) | 1774 kN1,774 kN |
| Dynamic axial load rating, compression (C_ax_H) | 1408 kN1,408 kN |
Level 3 · MERYDOM Engineering VerifiedCertified 2026-08-16 by MERYDOM Engineering Department.
SERIES LOAD CAPACITY
850 Series load chart
Use the model designation in the catalog legend as an initial moment-and-thrust capacity reference.
Engineering selection note
This catalog chart is a preliminary selection aid. Final MERYDOM application approval must also consider mounting rigidity, bolt capacity, duty cycle, lubrication and operating conditions.
MERYDOM ENGINEERING
Factory-certified replacement design
This MERYDOM bearing has been reviewed against the published model envelope, mounting interfaces, gear configuration and declared material specification for replacement use.
MERYDOM construction
- 42CrMo or 50Mn ring material options
- NBR nitrile-rubber sealing system
- Engineering nylon or brass spacer options
Factory documentation
- Engineering verification by MERYDOM Engineering Department
- Default approved drawing revision 1.0
- Certification date linked to the data-import record
Application confirmation
- Confirm support flatness, bolt grade and preload
- Verify applied loads, duty cycle and lubrication
- Confirm temperature, environment and installation conditions
LEGAL & ENGINEERING NOTICE
Independent replacement certification
- MERYDOM is the manufacturer and certifying party for the MERYDOM product displayed on this page.
- Third-party brand names and model numbers remain the property of their respective owners and are used only to identify the intended interchange reference.
- MERYDOM is an independent manufacturer and is not affiliated with, endorsed by or sponsored by the referenced OEM.
- The interchangeability statement applies to the matching model designation and the published verification scope; application suitability still depends on loads, duty cycle, installation, lubrication and operating environment.
- The approved quotation, manufacturing drawing and contract technical agreement control the final supplied product.
MERYDOM REPLACEMENT SUPPORT
Request price & deliveryReady for price, delivery and application confirmation?
Send the required quantity and operating conditions. MERYDOM will confirm the supply configuration, documentation package and delivery schedule for model 81-50 2987/2-06940.