High Power Model Rocketry

PRO Motor Retainers

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$19.21 $26.68 In stock

Our PRO Motor Retainers are CNC machined aluminum and anodized. Install on to the aft of your motor tube with BSI 15 minute epoxy and ergonomically flip motors in the field quickly and easily!

Our universal flange mount PRO Motor Retainers are perfect for your big projects. Installed on to your flush aft ring with the included self-tapping socket head cap screws, they make for an elegant aft hole!

Want ultimate versatility? Add a HAMR Adapter System to affordably adapt down on the fly!

LOC PRO Motor Retainer

  • 29mm: 30.1MM ID of retainer, sized for LOC cardboard motor tubes.
  • 38mm: 41.4MM ID of retainer, sized for LOC cardboard motor tubes.
  • 54mm: 57.7MM ID of retainer, sized for LOC cardboard motor tubes.

PML PRO Motor Retainer

  • 29mm: 32.4MM ID of retainer, sized for PML phenolic motor tubes.
  • 38mm: 42MM ID of retainer, sized for PML phenolic motor tubes.
  • 54mm: 58.1MM ID of retainer, sized for PML phenolic motor tubes.

PRO Flanged Motor Retainer

  • 75mm: Flanged sleeve has a 75.5mm ID, 98.4mm flange OD, with 12 M3 holes in an industry standard pattern for mounting. The cap threads on easily with large square threads with plenty of travel.
  • 98mm: Flanged sleeve has a 98.8mm ID, 126.2mm flange OD, with 12 M4 holes in an industry standard pattern for mounting. The cap threads on easily with large square threads with plenty of travel.
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.4 / 5 · 5 reviews)

Ruby B. ★★★★★

Swapping motors at the field used to mean fiddling with tape and clips, but these flip on and off in seconds now. The machined aluminum feels solid and the epoxy install on the motor tube was straightforward.

Hannah S. ★★★★★

The anodized finish on these is way nicer than the plain aluminum ones I used before, no scratches after a full season of swapping motors. The flip action is snappy and they grip the case tight without any wobble.

Emma L. ★★★★★

Glued these onto the aft of my motor tube with BSI 15 minute epoxy and they've held solid through a dozen launches. The machined aluminum is way beefier than the plastic clips I was using, and flipping motors at the field takes half the time now.