Lightweight Slewing Rings

Custom Bearing Materials

The IKT and IPT housings are available in various materials and gearing arrangements depending on your requirements. They are available in standard Steel, Stainless Steel and Aluminium. UNASIS aluminium slewing rings can be provided in 7075-T6 aluminium. The thin section insert bearings are typically 420 Stainless Steel for added corrosion resistance.

Specialist Coatings and Lubrications

With our aluminium slewing rings, we commonly anodise all surfaces except gear teeth when requested. Additional painting services are also available upon request. We offer dry film lubrications along with a full range of specialist greases based on each application. Our bearing engineers can advise precisely what you require.

Custom Bearing Design

Although we have an extensive standard range, most of our slewing ring solutions are custom designed for specific application criteria. Our bearing engineers can offer full application engineering support with lifetime testing with our proprietary bearing software, FEA validation and custom design to include special features like locations for encoders.

Testing and Validation

We have the capacity to test and validate our lightweight slewing rings. This includes runout tests and torque tests. We are able to achieve submicron runout tolerances and provide critical documentation to support this. As torque is a critical performance indicator for all mechanical systems, we can precisely adjust the starting and running torque for all of our custom slewing rings. We have gigs and fixtures to validate this torque which can then be modified using either ball selection or shims. Again, conformance documentation can be provided for validation.

Material Certifications and Traceability

UNASIS is highly experienced in the defense industry where quality control is of paramount importance. We can offer comprehensive and exhaustive quality documentation and traceability for every bearing supplied. Full traceability of every material process and first article inspection reports are available on all custom products.

Common Quality Requirements

• ISO 9001
  • Quality Management System – Requirements
• DEF STAN 81-41
  • Packaging of defense materiel
• DIN 867
  • Rack Tooth Gear Profiles
• MIL-A-8625, Type III
  •  Hardcoat Anodize
• MIL-A-8625, Type II
  • Sulfuric Anodizing
• ASME-Y14.100-2013
  • Engineering Drawing Practices
• AQAP-2070
  • NATO Mutual Government Quality Assurance (QA) Process
• AQAP-2110
  • NATO Quality Assurance Requirements for Design, Development and Production
• 1907/2006/EC
  • Regulation (EC) No 1907/2006 of European Parliament and of the Council of 18 December 2006 concerning the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH)

Custom Slewing Rings

Comprising of either two four-point contact ball bearings or a single cross roller split thin section bearing the IKT and IPT can withstand axial loads, radial loads, and moment loads without issues. UNASIS Slewing Bearings are available ungeared, internally geared or externally geared to suit your application.