help needed to identifi a key 8mm to 5mm

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Hello hope someone can help, I need to replace a key in a electric motor. the key has two different sizes. it is 8mm at the bottom then steps down too 5mm at the top. it connects the motor to a drive gearbox that turns a wheel.

 

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hope this photos helps

 

[flexoprinting]

Good morning

Well you have two options if you need it fast, you can carefully file (or preferably Mill) a standard key to fit both or use a key way cutter to make the key way on gear box larger.

Chuck

 

[flexoprinting]

Option # 3

http://www.grainger.com/category/step-key-stock/key-stock/fasteners/ecatalog/N-8kp

 

[SceneryDriver]

Option #4:

http://www.mcmaster.com/#key-stock/=ut3nap

Click on "step" keystock.


SceneryDriver

 

[ozsalty]

Probably easier just to make one....sorted