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Frameless Motor Mounting Practices: Clamping and Bolting
Embedded Motion Technology - Frameless Mounting Considerations
- The benefits of Improved System Performance, Reduced Maintenance, Smaller Mechanical Footprint, Higher System Efficiency are understood
- Customer still has a key question in mind …
- I like the frameless design concept but how do I mount the motor components into my machine?
Mechanical Mounting Considerations
- Customer’s own bearings
- Customer’s shafting / drivetrain
- Bearing precision and machining tolerances are dependent more on customer machine requirements than frameless motor mounting requirements
- Run-out more dependent on customer requirements
- Air gap of 0.015” – 0.075” (0.38 mm – 1.9 mm) each side of rotor needed for frameless motor
- Mounting; Bonding, Clamping, and Shrink fit options discussed in some detail in the KBM Selection Guide
Radial Running Clearance – “AirGap”
KBM-43X03 Mounting Example Clamping & Bolting 1
KBM-43X03 Mounting Example Clamping & Bolting 2
KBM-43X03 Mounting Example Clamping & Bolting 3
KBM-43X03 Mounting Example Clamping & Bolting 4
KBM-43X03 Mounting Example Clamping & Bolting 5
KBM-43X03 Mounting Example Clamping & Bolting 6
KBM-43X03 Mounting Example Clamping & Bolting 7
Clamping
- Recommended for KBM Frame size 118XX and smaller
- Designed for easy removal or maintenance acces•
- Design Recommendations
- Cylindrical cup shape customer housing
- Locating shoulder for precise location
- Lead in chamfer to aid in assembly operation
- Maintain clearance over potted winding surfaces > 2 mm
- Precise Location Slip Fit with housing of 0.10-0.05 mm over stator OD typical
- Maintain gap behind clamp ring to allow for compression on stator
- Engage at least half of the stator shoulder with the clamping ring
- Please Note that:
- Engineering Best Practices should be followed for determining the number and size of clamping ring bolts as required for the torque capacity of motor
KBM-43X03 Mounting Example Clamping & Bolting 8
KBM-43X03 Mounting Example Clamping & Bolting 9
KBM-43X03 Rotor Bolting Example
Clamping & Bolting:
- Bearing precision and machining tolerances are dependent more on customer machine requirements than frameless motor mounting requirements
- Clamping and bolting represent a cost-effective, easily removable, and mechanically sound approach to frameless motor mounting
- Several mounting options; Bonding, Clamping, and Shrink fit options are discussed in some detail in the KBM Selection Guide