Optimize Your Stitch: Handi Quilter Cerliani Tension Spring Screw

When your longarm machine skips stitches or suffers from inconsistent tension, the culprit is often a worn, loose, or missing tension spring screw in your bobbin case. The QM10589-95 Handi Quilter Cerliani Case Tension Spring Screw (Style A) is the exact, genuine replacement part engineered to restore your machine’s factory-perfect stitch precision.

Crafted specifically for genuine Cerliani rotary hook systems, this micro-screw secures the external leaf tension spring to the bobbin case. It allows for ultra-fine adjustments to your bobbin thread tension, ensuring flawless performance across varying thread weights.

Machine Compatibility Blueprint

This genuine Handi Quilter part is engineered for premium longarm systems utilizing Style M Cerliani bobbin cases, including:

• Handi Quilter: Amara, Forte, Infinity, Moxie, Simply 16, and Sweet Sixteen
• Janome: Quilt Maker Pro series
• Baby Lock: Regalia, Coronet, and Gallant

Step-by-Step Replacement & Adjustment Guide

Because this screw is microscopic, always work over a light-colored, lint-free cloth or a magnetic mat to prevent losing the part.

Step 1: Inspection & Tool Prep

Turn off your machine. Remove the bobbin case and extract the bobbin. Use a high-quality, properly fitting micro flathead screwdriver. Using a driver that is too large or too small will strip the delicate screw head slot.

Step 2: Threading or Replacing the Screw

Align the leaf spring over the screw hole on the side of the Cerliani bobbin case. Insert the QM10589-95 screw into the threaded hole labeled "A" (the smaller screw closest to the delivery eye, responsible for holding the spring and setting the baseline tension). Turn clockwise until it catches. Tighten until the spring is securely flush against the case, but do not overtighten, or you will strip the casing threads.

Step 3: Calibrating Bobbin Tension

Insert your bobbin threaded with your chosen quilting line. Perform a "drop test" or use a Towa tension gauge to measure the resistance.

• To Increase Tension (Thinner Threads): Turn the screw clockwise in tiny increments—think of a clock face and move it just "5 minutes" at a time.
• To Decrease Tension (Thicker Threads): Turn the screw counterclockwise in identical, microscopic increments.

Step 4: Verification

Pull the thread by hand. It should glide smoothly without catching, stuttering, or feeling gritty. Back-tack a small test sandwich on your longarm frame to ensure the top and bottom loops lock perfectly in the center of the batting.

Technical Specifications

• Part Number: QM10589-95 (Alternative designations: Cerliani Case T.Spring A)
• Screw Type: Style A (Tension Spring Retaining/Adjustment)
• Hook Manufacturer Compatibility: Authenticated for original Italian Cerliani Bobbin Cases
• Material: Case-hardened, high-tensile industrial steel