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
   

BT5 Thrust Ring. 6 Pack

6 Engine Blocks for Mini Engines. Fits BT-5 Tube.
$1.30

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BT20 Thrust Ring. 6 Pack

6 Engine Blocks for Standard Engines. Fits BT-20 Tube. Engine Block or Thrust Ring is used to position the engine in the engine tube.
$1.75

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BT50 (24mm) Thrust Ring. 6 Pack

6 Engine Blocks for 24 mm Engine Mount. Fits BT-50 Tube. Engine Block or Thrust Ring is used to position the engine in the engine tube.
$1.95

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29mm Thrust Ring. 5 Pack

5 Kraft paper Thrust Rings Dimensions: 1.124" O.D. 1.02" I.D. 0.625" long Weight: 1.5g
$2.00

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BT20/BT5 Centering Rings. 4 Pack

This ring will center a BT-5 tube for mini-engines within a BT-20 tube.
$2.25

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BT50/BT20 Centering Rings. 6 pack

This ring will center a BT-20 tube (standard engine mount tube) within a BT-50 tube.
$1.55

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BT55/BT20 Plywood Centering Rings. 6 Pack

This ring will center a BT-20 tube (standard engine mount tube) within a BT-55 tube. Three disks have a motor hook slot.
$5.45

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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.
$5.85

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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.
$5.95

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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.
$6.45

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