Centering,Thrust & Cluster Rings

Centering rings are used to keep a small tube nested within a large one. For example BT50/BT20 will center BT20 tube inside the BT50.

Thrust rings or engine blocks are glued inside the motor mount and prevent motors from going forwards. Model rocket motors with a thrust ring (such as Aerotech motors) do not require an engine block installed in the rocket. Motors without a thrust ring (such as Estes A/B/C/D/E) require a motor block installed in the rocket. Cluster rings hold several motor tubes.

We offer centering and cluster rings for low, mid and high-power rockets, you can narrow your selection by clicking buttons below.

Thrust Rings
Thrust Rings
Smaller Motor Tubes
Smaller Centering Rings
Larger Motor Tubes
Larger Centering Rings (>=29mm)
Cluster Rings
Cluster Rings
Back to Build Supplies
Back to Build
Supplies
   

3.0 - 2.2 Centering Ring

3.0" - 2.2" (3" - 54 mm) centering ring holds 54mm motor tube inside 3" airframe. 1/4" plywood. Fits into any 3" airframe. Works best with Madcow kraft, GLR fiberglass, some LOC Paper 54mm motor tubes. (2.23-2.24" motor tube OD) Please see next item for same ring cut for different 54 motor tubes
$2.95

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3.0 - 2.2 (P) Centering Ring

3.0" - 2.2" (3" - 54 mm) centering ring holds 54mm motor tube inside 3" airframe. 1/4" plywood. Fits into any 3" airframe. Works best with PML and GLR phenolic, Hawk Mt and Performance Rocketry fiberglass 54mm motor tube. Please see previous item for same ring cut for different 54 motor tubes
$2.95

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4.0 - 2.2 Centering Ring

4.0" - 2.2" (4" - 54 mm) centering ring holds 54mm motor tube inside 4" airframe. 1/4" plywood. Fits into any 4" airframe. Works best with Blue Tube, LOC/Precision and Madcow paper 54mm motor tube.
$3.50

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4.0 - 2.2 (P) Centering Ring

4.0" - 2.2" (4" - 54 mm) centering ring holds 54mm motor tube inside 4" airframe. 1/4" plywood. Fits into any 4" airframe. Works best with PML and GLR phenolic, Hawk Mt and Performance Rocketry fiberglass 54mm motor tube.
$3.50

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4.0 - 3.0 Centering Ring

4.0" - 3" (4" - 75 mm) centering ring holds 75mm motor tube inside 4" airframe. 1/4" plywood. Fits into any 4" airframe. Works best with Madcow paper, Performance Rocketry fiberglass, Quantum tubing 75mm tubes. (3.0 - 3.12" motor tube OD) Please see next item for same ring cut for different 3"...
$3.50

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4.0 - 3.0 (P) Centering Ring

4.0" - 3" (4" - 75 mm) centering ring holds 75mm motor tube inside 4" airframe. 1/4" plywood. Fits into any 4" airframe. Works best with PML and GLR phenolic, Hawk Mt and Performance Rocketry fiberglass, LOC paper, semroc paper 75mm motor tube. (3.15 - 3.25" motor tube OD) Please see previous item...
$3.50

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3.0 - 2 x 1.1 Centering Ring

3.0 - 2 x 1.1 Centering Ring

Cluster centering ring, fits 3.0" airframe. (2) 29mm (1.1") holes. 3/16" birch plywood. Fits into any 3" airframe. Works best with Aerotech paper, LOC paper, fiberglass, Semroc 29mm motor tube. (1.22 - 1.23" motor tube OD) Please see next item for same ring cut for different 29mm tubes.
$5.20

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3.0 - 2 x 1.1 (P) Centering Ring

3.0 - 2 x 1.1 (P) Centering Ring

Cluster centering ring, fits 3.0" airframe. (2) 29mm (1.1") holes. 3/16" birch plywood. Fits into any 3" airframe. Works best with LOC Paper, PML and GLR phenolic, Hawk Mt and Performance Rocketry fiberglass 29mm motor tube. (1.269" motor tube OD) Please see previous item for same ring cut for...
$5.20

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3.0 - 3 x 1.1 Centering Ring

3.0 - 3 x 1.1 Centering Ring

Cluster centering ring, fits 3.0" airframe. (3) 29mm (1.1") holes. 3/16" birch plywood. Fits into any 3" airframe. Works best with Aerotech paper, LOC paper, fiberglass, Semroc 29mm motor tube. (1.22 - 1.23" motor tube OD) Please see next item for same ring cut for different 29mm tubes.
$6.25

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3.0 - 3 x 1.1 (P) Centering Ring

3.0 - 3 x 1.1 (P) Centering Ring

Cluster centering ring, fits 3.0" airframe. (3) 29mm (1.1") holes. 3/16" birch plywood. Fits into any 3" airframe. Works best with LOC Paper, PML and GLR phenolic, Hawk Mt and Performance Rocketry fiberglass 29mm motor tube. (1.269" motor tube OD) Please see previous item for same ring cut for...
$6.25

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