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 |
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...
4.0 - 2 x 1.1 Centering Ring
Cluster centering ring, fits 4.0" airframe. (2) 29mm (1.1") holes. 3/16" birch plywood. Fits into any 4" airframe. Works best with Aerotech paper,...
4.0 - 2 x 1.1 (P) Centering Ring
Cluster centering ring, fits 4.0" airframe. (2) 29mm (1.1") holes. 3/16" birch plywood. Fits into any 4" airframe. Works best with LOC Paper, PML and...
4.0 - 3 x 1.1 Centering Ring
Cluster centering ring, fits 4.0" airframe. (3) 29mm (1.1") holes. 1/4" plywood. Fits into any 4" airframe. Works best with Aerotech paper, LOC...
4.0 - 3 x 1.1 (P) Centering Ring
Cluster centering ring, fits 4.0" airframe. (3) 29mm (1.1") holes. 3/16" birch plywood. Fits into any 4" airframe. Works best with LOC Paper, PML and...
4.0 - 2 x 38mm(T/P) Centering Ring
4"/98mm Cluster Centering Ring for two 38mm motor tubes. 1/4" plywood. Fits into any 4" airframe. Works best with Rocketarium 38mm(T), PML phenolic...
4.0 - 2 x 38mm(S) Centering Ring
4"/98mm Cluster Centering Ring for two 38mm motor tubes. 1/4" plywood. Fits into any 4" airframe. Works best with Rocketarium 38mm (S), LOC and...
4.0 - 3 x 38mm(T) Centering Ring
4"/98mm Cluster Centering Ring for three 38mm motor tubes. 1/4" plywood. Fits into any 4" cardboard airframe. Works best with Rocketarium 38mm(T) and...
4.0 - 3 x 38mm(P) Centering Ring
4"/98mm Cluster Centering Ring for three 38mm motor tubes. 1/4" plywood. Fits into phenolic 4" airframe. Works best with PML phenolic 38mm Tube -...
4.0 - 3 x 38mm(S) Centering Ring
4"/98mm Cluster Centering Ring for three 38mm motor tubes. 1/4" plywood. Fits into any 4" cardboard airframe. Works best with Rocketarium 38mm (S),...