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 |
2.1 (P) - 1.1 (P) Centering Ring
2.1" - 1.1" (54 mm - 29 mm). 1/4" plywood. Fits into PML 2.1" Phenolic and holds PML 1.1" (29 mm) Phenolic Tube. - 1.28", - 2.142", 1/4"", ...
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....
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....
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...
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,...
3.0 - 1.1 (S) Centering Ring
3.0" - 1.1" for Standard 29mm Tubes. 1/4" plywood. Fits into any 3" airframe. - 30.9mm, - 75.9mm, 6mm, 16g
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...
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,...
4.0 - 1.1 (S) 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 Apogee,...
54mm - 38mm(T/P) Centering Ring
54 mm to 38 mm centering ring holds 38mm motor tube inside 54mm motor tube. 6mm plywood. Fits into any 54mm airframe. Works best with Rocketarium...