Which Pella crank do I have?

Your answers so far are below. Change any of them and the result updates.

brandPella

Know the brand?Use a name or marking on the original part; leave unknown if unconfirmed.

Which one looks like yours?

Compare the full linkage or the seal’s end-on cross-section.

Which operator hand?

Match the supplier’s viewing convention, not the handle’s turning direction.

How long is the arm / link?Measure between the exact endpoints on the source drawing — not overall length.Handle spline / spindleMeasure the handle spindle and check its shape and tooth pattern. I have checked the source drawing, mounting, attachment and handedness convention against my original part.

6 candidate parts

Matching 1 selected catalog fields. Check full dimensions, mounting and the source drawing before ordering.

Illustration

Candidate — verify fit

Pella sash crank operator · 39-175

Part number 39-175

Shape / profileSash crank
Link pivot spacing5"
Mounting width shown3-13/16"
Drawing orientationArm bends to the right

Confirm mounting, full dimensions and the supplier’s handedness drawing before ordering.

Check source / price Full details

We don't sell parts. Retailer links may earn us a commission.

Sizes from the swisco.com source, checked 2026-10-26.

Illustration

Candidate — verify fit

Pella sash crank operator · 39-176

Part number 39-176

Shape / profileSash crank
Link pivot spacing5"
Mounting width shown3-13/16"
Drawing orientationArm bends to the left

Confirm mounting, full dimensions and the supplier’s handedness drawing before ordering.

Check source / price Full details

We don't sell parts. Retailer links may earn us a commission.

Sizes from the swisco.com source, checked 2026-10-26.

Illustration

Candidate — verify fit

Pella replacement casement operator S1088 · left

Part number S1088

Shape / profileCasement operator
Operator handLeft
Window vintageArchitect Designer 1993–1999; ProLine 1991–2000

Confirm mounting, full dimensions and the supplier’s handedness drawing before ordering.

Check source / price Full details

We don't sell parts. Retailer links may earn us a commission.

Sizes from the windowpartscenter.com source, checked 2026-10-26.

Illustration

Candidate — verify fit

Pella replacement casement operator S1088 · right

Part number S1088

Shape / profileCasement operator
Operator handRight
Window vintageArchitect Designer 1993–1999; ProLine 1991–2000

Confirm mounting, full dimensions and the supplier’s handedness drawing before ordering.

Check source / price Full details

We don't sell parts. Retailer links may earn us a commission.

Sizes from the windowpartscenter.com source, checked 2026-10-26.

Illustration

Candidate — verify fit

Pella replacement casement operator S1084 · left

Part number S1084

Shape / profileCasement operator
Operator handLeft
Window vintage1967–1993
Mounting3-3/4" base hole width
Arm length6"

Confirm mounting, full dimensions and the supplier’s handedness drawing before ordering.

Check source / price Full details

We don't sell parts. Retailer links may earn us a commission.

Sizes from the windowpartscenter.com source, checked 2026-10-26.

Illustration

Candidate — verify fit

Pella replacement casement operator S1084 · right

Part number S1084

Shape / profileCasement operator
Operator handRight
Window vintage1967–1993
Mounting3-3/4" base hole width
Arm length6"

Confirm mounting, full dimensions and the supplier’s handedness drawing before ordering.

Check source / price Full details

We don't sell parts. Retailer links may earn us a commission.

Sizes from the windowpartscenter.com source, checked 2026-10-26.

What to check first

Mechanism: straight arm, split/dual arm, dyad or awning. Match the complete linkage.
Hand: use the supplier’s drawing and viewing convention. Clockwise or counterclockwise handle rotation alone is not enough.
Arm or link length: use the exact dimension endpoints shown on the source drawing.
Spline and mounting: compare the handle spindle, screw centers, attachment and arm offset.

What these results cover

This starter catalog contains 6 Pella records for this family. An empty result means we do not have a documented match for those selections. It does not mean your part is unavailable.

Open a candidate’s record to inspect every sourced measurement and its original listing. Dimensions that have not been sourced are omitted.