Rocket Bits focuses on quality parts for the right price made with the highest quality materials. If you are interested in getting into Experimental Model Rocketry, check out our selection for 29mm and 38mm motors. And if you are in the market for a new nozzle for a new propellant you want to try, we can make a nozzle size that will be perfect for it. If you have a nozzle that got cracked or the throat has been eroded, we can make a new one to the size you want. As always we try to ship within 2 business days.

Browse our latest products

Dimensions

29mm motor casings have an ID of 0.995"

29mm Case Length: 2 Grain 5.75", 4 Grain 9.25", 6 Grain 12.75"

38mm motor casings have an ID of 1.334"

38mm Case Length: 2 Grain 6.75", 4 Grain 11.25", 6 Grain 15.75"

Liner and Casting Tube Recommendations

For casting liner and casting tube for the 29mm I recommend:
Liner:​https://www.erockets.biz/semroc-hea...-lined-22-0-long-1pk-sem-bth-50mf-220-master/​

Casting tubes:​https://www.rocketmotorparts.com/index.aspx?pageid=1577809&prodid=7781854​

For casting liner and casting tube for the 38mm I recommend:
Liners and casting tubes from the @pathtouch group order in The Rocketry Forum

1.255x1.323x48” XX Tubing and casting tubes

Or: Always Ready Rocketry

https://alwaysreadyrocketry.com/product/standard-casting-tubes/

Disclaimer:

Rocket Bits LLC exercises no control over the manner in which its products are installed, handled, stored, or used. Accordingly, Rocket Bits LLC expressly disclaims any and all liability for personal injury, death, property damage, or any other loss or damage arising out of or related to the use, misuse, or inability to use its products. By purchasing and/or using these products, the purchaser expressly assumes all risks, responsibilities, and liabilities associated therewith and agrees to indemnify and hold harmless Rocket Bits LLC from any claims arising from such use.

All rights reserved.