Precision Collar HIROBO HI2521115 3 x 8 x 1.5 for RC Shafts  [HI2521115]

HIROBO 2521-115 COLLAR 3 X 8 X 1.5 #2521115
Price:
£4.09
Brand:
Hirobo
Model:
HI2521115
GTIN:
4512895137151
Condition:
Brand New
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Small collar for precise spacing

This HIROBO collar is an RC spare intended to perform as a compact spacer or bushing within helicopter assemblies. The model code HI2521115 and size 3 x 8 x 1.5 state the inner diameter, outer diameter and thickness, indicating where it is appropriate for tight axial spacing or straightforward shaft alignment in general helicopter components.

Typical role: used as a thin spacer between rotating parts or between a shaft and bearing surface, the collar promotes concentric alignment and diminishes lateral play during setup and tuning. It finds use in linkages, rotor hubs, and small rotary shafts where repeatable clearance is needed.

Installation notes: position the collar on the shaft or in the bore as required, ensure free rotation before final assembly, and inspect for any contact with nearby components. Use normal hobby tools to install or remove collars and confirm final clearances with the rotor stationary.

Which shaft sizes work with this collar?

The inner diameter is 3mm, so it is designed to fit shafts of that diameter; check the mating bore or sleeve for adequate clearance to accept the 8mm outer diameter.

Can this collar be used outside helicopter assemblies?

Yes, where a small, repeatable spacer is required and the dimensions match, the collar can be applied in other RC components or small mechanical assemblies that need a 3 x 8 x 1.5 spacer.

What is the easiest way to confirm fitment?

Try the collar on the shaft without adhesive to ensure correct seating, rotate the assembly to check for binding, and measure clearances against adjacent parts before completing reassembly.

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