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

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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1.6 - 1.1 (P) 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 LOC Paper, PML and GLR phenolic, Hawk Mt and Performance Rocketry fiberglass 29mm motor tube. (1.269" motor tube OD) Please see previous item for same...
$2.05

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