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

1.9 - 1.1 Centering Ring

1.9" - 1.1" (29 mm) centering ring holds 29mm motor tube inside 1.9" Aerotech airframe. 1/4" plywood. Designed to center Rocketarium, Aerotech, LOC paper, fiberglass, Semroc 29mm motor tube. (1.22 - 1.23" motor tube OD)
$2.30

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2.2 - 1.1 Centering Ring

2.2" - 1.1" (ID 54 mm - 29 mm) centering ring holds 29mm motor tube inside 54mm airframe. 1/4" plywood. Fits into any 54mm 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...
$2.40

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2.2 - 1.1 (P) Centering Ring

2.2" - 1.1" (ID 54 mm - 29 mm) centering ring holds 29mm motor tube inside 54mm airframe. 1/4" plywood. Fits into any 54mm 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...
$2.40

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2.6 - 1.1 Centering Ring

2.6" - 1.1" (2.6" - 29 mm) centering ring holds 29mm motor tube inside 2.6" airframe. 1/4" plywood. Fits into any 2.6" airframe including BT-80 tube. 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...
$2.75

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2.6 - 1.1 (P) Centering Ring

2.6" - 1.1" (2.6" - 29 mm) centering ring holds 29mm motor tube inside 2.6" airframe. 1/4" plywood. Fits into any 2.6" airframe including BT-80 tube. 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...
$2.75

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3.0 - 1.1 Centering Ring

3.0" - 1.1" (3" - 29 mm) centering ring holds 29mm motor tube inside 3" airframe. 1/4" 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.
$2.95

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3.0 - 1.1 (P) Centering Ring

3.0" - 1.1" (3" - 29 mm) centering ring holds 29mm motor tube inside 3" airframe. 1/4" 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...
$2.95

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4.0 - 1.1 Centering Ring

4.0" - 1.1" (4" - 29 mm) centering ring holds 29mm motor tube inside 4" airframe. 1/4" plywood. Fits into any 4" 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.
$3.50

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4.0 - 1.1 (P) Centering Ring

4.0" - 1.1" (4" - 29 mm) centering ring holds 29mm motor tube inside 4" airframe. 1/4" plywood. Fits into any 4" 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...
$3.50

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2.2 - 1.6 Centering Ring

2.2" - 1.6" (ID 54 mm - 38 mm) centering ring holds 38mm motor tube inside 54mm airframe. 1/4" plywood. Fits into any 54mm airframe. Works best with Blue Tube, Madcow Paper and Fiberglass, LOC Paper and Phenolic 38mm motor tube. (1.625 - 1.635" motor tube OD) Please see next item for same ring cut...
$2.40

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