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 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 |
 Smaller Centering Rings |
 Larger Centering Rings (>=29mm) |
 Cluster Rings |
 Back to Build Supplies |
2.6 - 2.2 (P) Centering Ring
2.6" - 2.2" (2.6" - 54 mm) centering ring holds 54mm motor tube inside 2.6" airframe. 1/4" plywood. Fits into any 2.6" airframe including BT-80 tube....
3.0 - 54mm Centering Ring
3" - 54 mm centering ring holds 54mm motor tube inside 3" airframe. 1/4" plywood. Fits into any 3" airframe. Works best with Rocketarium, Madcow...
3.0 - 2.1 (P) Centering Ring
3.0" - 2.1" (P) (3" - 54 mm) centering ring holds 2.1" PHENOLIC motor tube inside 3" airframe. 1/4" plywood. Fits into any 3" airframe. Works best...
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,...
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...
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...
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...
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,...
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...
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,...