High Power Model Rocketry

Centering Ring

Centering Ring - Main image
Centering Ring - View 2
$1.43 $14.11 In stock

"Centering Rings (CR)" fit inside our airframe tubing while "Coupler Centering Rings (CCR)" fit inside our coupler tubing.

"Bulkplates (BP)" fit inside our airframe tubing while "Coupler Bulkplates (CBP)" fit inside our coupler tubing.

"Piston Plates (PS)" fit inside of our coupler tubing and have a slot cut into the middle of the plate to accept a piston strap. All Piston Plates are 1/4” plywood.

Centring rings and bulk plates for airframes 3.9" and smaller are 1/4" birch plywood or G-10 while centring rings and bulk plates for airframes 6.0" and larger are 3/8" plywood.

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When it ships

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.4 / 5 · 5 reviews)

Riley W. ★★★★★

The fit is spot-on for both the airframe and coupler tubes since they're machined to those two distinct inner diameters. I double-checked the CCR against my coupler and it slid in with just the right amount of friction, no shimming needed.

Ryan ★★★★★

The labeling system between the CR and CCR rings is spot on, so I didn't have to guess which one went into the coupler tube versus the airframe. Everything seated flush with no sanding needed, which saved me a good chunk of build time.

Harper ★★★★★

The descriptions made it dead simple to figure out which ring goes in the airframe versus the coupler, so there was zero guesswork during assembly. They seated snugly with a satisfying fit right out of the package, and the build feels solid enough that I'm confident about the alignment on the next f