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
   

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.
$5.45

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BT60/BT50 Plywood Centering Rings. 6 Pack

This ring will center a BT-50 tube (24 mm engine mount tube) within a BT-60 tube.
$5.85

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BT60 - 29mm Centering Ring. 2 Pack

2 of BT60 - 29mm centering ring holds 29mm motor tube inside BT-60 airframe. 1/8" plywood. Works best with LOC paper, fiberglass, Madcow and Semroc 29mm motor tube. (1.22 - 1.225" motor tube OD). One ring has a notch to accommodate G size hook.
$2.95

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BT60 - 29mm Centering Ring (TW). 2 Pack.

2 of BT60 - 29mm centering ring holds 29mm motor tube inside BT-60 airframe. 1/8" plywood. Works best with Rocketarium (TW) and Aerotech paper 29mm motor tube. (1.235 - 1.24" motor tube OD) One ring has a notch to accommodate G size hook.
$2.95

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BT70/BT50 Plywood Centering Rings. 4 Pack

This ring will center a BT-50 tube (24 mm engine mount tube) within a BT-70 tube. Two disks have a motor hook slot.
$5.95

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BT80/BT50 Plywood Centering Rings. 4 Pack

This ring will center a BT-50 tube (24 mm engine mount tube) within a BT-80 tube. Two disks have a motor hook slot.
$6.45

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BT80 - 29mm Centering Ring. 2 pack

2 of BT80 - 29mm centering ring holds 29mm motor tube inside BT-80 airframe. 1/8" plywood. Fits into any 2.6" BT-80 tube. Works best with LOC paper, fiberglass, Semroc 29mm motor tube. (1.22 - 1.225" motor tube OD) One ring has a notch to accommodate G size hook. Please see 2.6" rings for 1/4"...
$5.00

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BT80 - 29mm Centering Ring (TW). 2 Pack

BT80 - 29mm centering ring holds 29mm motor tube inside BT-80 airframe. 1/8" plywood. Fits into any 2.6" BT-80 tube. Works best with Rocketarium (TW) and Aerotech paper 29mm motor tube. (1.235 - 1.24" motor tube OD) One ring has a notch to accommodate G size hook. Please see 2.6" rings for 1/4"...
$5.00

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1.1 (29mm) - 24mm Centering Rings. 2 Pack

1.1" (29mm) - 24mm centering ring holds 24mm motor tube inside 29mm airframe. Kraft Paper. Fits into any 29mm airframe. Works best with Estes thick-wall or Rocketarium thick-wall motor tube.
$0.90

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1.6 - 1.1 Centering Ring

1.6" - 1.1" (ID 38 mm - 29 mm) centering ring holds 29mm motor tube inside 38mm airframe. 1/4" plywood. Fits into any 38mm airframe. Works best with Rocketarium and Aerotech paper, LOC paper, fiberglass, Semroc 29mm motor tube. (1.22 - 1.23" motor tube OD) Please see next item for same ring cut for...
$2.05

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