Prop adaptor selection guide

What is a propeller adaptor?

A propeller adaptor (Also called a "shaft adaptor" or a "prop driver") is a small device that sits over the bare shaft of your electric motor, in order to allow a propeller to be mounted. Propeller adaptors usually always include a nut and washer, to secure the propeller after mounting.

Types of propeller/shaft adaptor

The available types of propeller adaptor are generally determined by the way the adaptor fits on the motor shaft. In this case, there are two types: grub screw fitting and collet type fitting.

Collet type propeller adaptors

Collet type propeller adaptors are also known as clamping type or "clamping cone". These adaptors sit on the motor shaft and literally are clamped on by the securing collet and the pressure of the nut and washer holding the collet over the cone of the adaptor to clamp onto the shaft. These are undoubtedly the most popular type of adaptor.
Fig 1. A collet type adaptor.
collet type propeller adaptor

Grub screw type propeller adaptors

Grub screw type adaptors are usually used for shafts which have a filed area, against which the grub screw is tightened to prevent the adaptor from rotating loose on the shaft and thus affecting propeller RPM.
Fig 2. A grub screw type adaptor.
grub screw type propeller adaptor

Available Propeller Adaptors

The table below shows the dimensions of various prop adaptors we have available. For suitability to your particular application, please check the table. Adaptors are not suitable for use with Model Motors AXi radial mounting sets unless otherwise indicated.

Adaptor    Suits shaft size    Adaptor size    Thread    Total length    Free length    Hub    Front bore    
7124/033.2mm6mmM622mm5mm12mmM2
7124/044.0mm8mmM826mm7.5mm20mmM2.5
7124/056.0mm8mmM826mm7.5mm20mmM2.5
7124/072.3mm6mmM623mm7mm12mmM2
7124/083.2mm8mmM828mm11mm14mmM2.5
7124/095.0mm8mmM828mm11mm14mmM2.5
7124/114.0mm8mmM828mm11mm14mmM2.5
7124/126.0mm8mmM828mm11mm14mmM2.5
7124/133.2mm6mmM627mm6mm12mmM2
7124/175.0mm8mmM826mm7.5mm20mmM2.5
7124/322.3mm6mmM625mm9mm15mmM2
7124/333.2mm6mmM625mm9mm15mmM2.5
7124/343.0mm6mmM625mm--M2.5
7124/352.0mm6mmM625mm---
7124/363.0mm6mmM622mm4mm12mmM2.5
7124/373.2mm8mmM825mm---
7124/383.0mm8mmM822mm4mm12mmM2.5
7124/444.0mm8mmM835mm14mm14mmM2.5
7124/455.0mm8mmM835mm14mm14mmM2.5
7124/466.0mm8mmM835mm14mm14mmM2.5
7124/544.0mm8mmM835mm15mm20mmM2.5
7124/555.0mm8mmM835mm15mm20mmM2.5
7124/566.0mm8mmM835mm15mm20mmM2.5


 Click here to see all prop adaptors
 Click here for prop savers
 Click here for aluminium centre pieces for folding propellers


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