How to measure spline for T Handles

A quick learner says:

July 8, 2010

I need to replace a regular crank handle with a t handle can you tell me how to measure for a compatable spline? but how can I call you to determine the fit. also can it be in brushed nickel or a silver look? thanks Robin

Dave Sr. from SWISCO responded:

July 9, 2010

View of the spline opening of the 39-102 crank handle.

Hope this picture helps. A great way to determine the handle is to identify the operator. Look on the operator itself to see if there is a name on it. A good place to check is the operator arm. To do this, remove the window screen & crank open the window. You should see a name on the long operator arm. Also, do you have a Wood, Vinyl or Aluminum window? Wood & vinyl windows usually have a 11/32" spline similar to our 39-102 (but not all the time). Aluminum or metal windows usually have a 5/16" or a 3/8", similar to our 39-108 .

A quick learner from New Hampshire says:

January 30, 2023

We have an Anderson wood Bow window from the second half of the 1970s. As the sill is quite distressed I'm installing a new sill the is about 1/4" thick. The existing cranks won't clear so I'm looking for T handles. My existing handles have set screws. How should I measure the diameter, on the outside of the splines or in the "shallows" between the splines? I can do it either way with my calipers.

thanks,

Max

Tom from SWISCO responded:

January 31, 2023

Hello, Max. You want to measure the diameter of the hole, not the inner diameter of the teeth. The image below should give you a better idea of what I mean.

If you have an Andersen brand operator, then odds are the spline is 3/8".

View of the gear hole with measurements

Alternate view of the gear hole

T Handle, 11/32"

39-102

$7.45

Jalousie T Handle, 3/8"

39-108

$3.87

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