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 |
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BT-5 Thrust Ring. 6 Pack
6 Engine Blocks for Mini Engines. Fits BT-5 Tube. Paper - 11mm, - 13mm, 6.5mm, 0.2g
BT-20 Thrust Ring. 6 Pack
6 Engine Blocks for Standard Engines. Fits BT-20 (18mm) Tube. Engine Block or Thrust Ring is used to position the engine in the engine tube. -...
BT50 (24mm) Thrust Ring. 6 Pack
6 Engine Blocks for 24 mm Engine Mount. Fits BT-50 (24mm) Tube. Engine Block or Thrust Ring is used to position the engine in the engine tube. -...
29mm Thrust Ring. 5 Pack
5 Kraft paper Thrust Rings for 29mm Motors Dimensions: 1.134" O.D. 0.98" I.D. 0.625" long Weight:1.5g
BT50/BT20 Centering Rings. 6 pack
This ring will center a 18mm (BT-20) engine mount tube inside of a 24mm BT-50 tube. - 18.82mm, - 24mm, 5.1mm, 0.6g
BT55/BT20 Plywood Centering Rings. 6 Pack
This ring will center a 18mm (BT-20) tube (standard engine mount tube) inside of BT-55 tube. Three disks have a motor clip slot. Light Plywood -...
BT60/BT20 Plywood Centering Rings. 6 Pack
This ring will center a BT-20 tube (standard engine mount tube) within a BT-60 tube. Three disks have a motor hook slot.
BT70/BT20 Plywood Centering Rings. 4 Pack
This ring will center a BT-20 tube (standard engine mount tube) within a BT-70 tube. Two disks have a motor hook slot.
BT80/BT20 Plywood Centering Rings. 4 Pack
This ring will center a BT-20 tube (standard engine mount tube) within a BT-80 tube. Two disks have a motor hook slot.
BT55/BT50 Plywood Centering Rings. 6 Pack
This ring will center a BT-50 tube within a BT-55 tube. Plywood. 3 rings have a notch to accommodate motor hook.