Casement window cranks

A home owner from Ramsey NJ says:
March 8, 2024
I have casement windows, circa 1982-84, that have cranks that have failed. I need both left and rights. From what I have found, US patent number 4.241.541 1982 and on the short arm is etched number 31538. Long arm is approx 9 1/2" and short arm approx 3 1/2" to swivel then 4"
Thumbnail of the uploaded file named Crank Window Operator
Thumbnail of the uploaded file named Casement Window Operator
Thumbnail of the uploaded file named Operator Pat# 1982
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Jasmine from SWISCO responded:
March 11, 2024

Thanks for posting! Your operator looks pretty similar in design to the  39-031 EntryGard Dual Arm Operator (the opposite handed version is part 39-032). 

These operators are compatible with the 39-107 Truth Hardware Cover along with the 39-114L non-folding or 39-205 folding crank handles; another replacement option is the 39-107FK , which is a folding crank and cover kit.

Take a look over the dimension below and compare them to your existing operator to see if this would work as a suitable replacement for your operator.

Dimensions for 39-031
Dimensions for 39-031

Dimensions for 39-031
Dimensions for 39-031
EntryGard Dual Arm Operator
EntryGard Dual Arm Operator
39-031
$29.70
EntryGard Dual Arm Operator
EntryGard Dual Arm Operator
39-032
$29.70
Truth Hardware Operator Cover
Truth Hardware Operator Cover
39-107
$3.30
Crank Handle, 11/32"
Crank Handle, 11/32"
39-114L
$4.42
Truth Folding Crank Handle, 11/32"
Truth Folding Crank Handle, 11/32"
39-205
$11.70
Truth Folding Handle And Cover Kit
Truth Folding Handle And Cover Kit
39-107FK
$15.45
11-3/8" EntryGard Track, 4 Hole
11-3/8" EntryGard Track, 4 Hole
39-505
$3.70
#10 x 1" Flat Head Philips SS Screw
#10 x 1" Flat Head Philips SS Screw
33-079
$0.20
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