Enlarge image ↗All 20 guide-and-nut pairs, shown in orange. Labeled product illustration; each size is included in the set.
Tube Cutting Guides — Complete 20-Size Set
Twenty standalone tube cutting guides with matching compression nuts and front-face marks for 3-fin and 4-fin layouts. The complete orange set is $149.98.
- 20 guides + 20 matching nuts
- All orange
- 3-fin & 4-fin marking positions
- BT-20 through 5.38-inch LOC
Get the complete 20-size set
Every size is included: 20 guide bodies and 20 matching compression nuts, all in orange. Choose the number of complete sets below.
Current dispatch estimate: about 4 days after ordering.Usually 2–3 days from order to dispatch. Timing varies with order size and our production queue; shipping transit time is additional.Estimate updated October 5, 2026.
We couldn’t load ordering options. Please try again or contact us for help with this product.
Get ordering help →Free shipping on orders $100+No code needed. Shipping details →
Shipping on orders under $100 is calculated at checkout. For a required arrival date, contact us before ordering.
All 20 included sizes
One guide and one matching compression nut in every listed size. The measurements are nominal tube outside diameters (OD), not the printed guide's outside diameter.
| Tube size | Tube OD (mm) |
|---|---|
| BT-20 | 18.6944 |
| BT-50 | 24.7904 |
| 29 mm thin-wall tube | 29.8704 |
| 29 mm thick-wall tube | 30.734 |
| BT-55 | 33.655 |
| 40 mm competition tube | 40.513 |
| BT-60 | 41.5798 |
| BT-70 | 56.3118 |
| 54 mm Apogee / LOC motor tube | 57.404 |
| BT-80 | 66.04 |
| LOC 2.56-inch body tube | 66.802 |
| 76.20 mm outside-diameter tube | 76.20 |
| LOC 3-inch body tube | 78.74 |
| 3-inch fiberglass tube fit | 79.248 |
| 80.00 mm outside-diameter tube | 80.00 |
| LOC 75 mm motor tube | 80.3148 |
| LOC 4-inch body tube | 101.6 |
| 4-inch fiberglass tube fit | 102.108 |
| 5-inch fiberglass tube fit | 130.81 |
| LOC 5.38-inch body tube | 140.716 |
Cutting and marking
- Match the tube. Choose the size that matches your tube's outside diameter. Slide it into position and tighten the matching compression nut to hold it.
- Use the front collar as your reference. Work with your own manual cutting tool suitable for the tube material.
- Mark the fin positions. Use the shared 0 reference, then the two 3 marks for a three-fin layout or the three 4 marks for a four-fin layout.
The three-fin pattern is spaced at 120°; the four-fin pattern is spaced at 90°. All marking positions are on the front collar. The compression nut rotates independently and has no fin-position scale.
Product details
- Included
- One guide body and one matching compression nut in each of 20 sizes; 40 printed pieces total
- Use
- Standalone reference guides for manual tube cutting and fin-position marking
- Marking positions
- 3-fin and 4-fin positions on the front collar, with a shared 0 reference
- Color
- Orange guide bodies and orange compression nuts
- Material
- PETG
- Size range
- BT-20 through 5.38-inch LOC; nominal tube outside diameters from 18.6944 to 140.716 mm
- Cutting tool
- Use your own cutting tool appropriate to the tube material; no blade or cutter handle is included
- Price
- $149.98 USD for the complete set
- Product type
- Physical printed set; STL files are not included
Before you order
Match the tube name and measured outside diameter to the included-size list. Nominal motor and inch sizes are different from tube outside diameters. The largest LOC guide is the 5.38-inch family, with a 140.716 mm nominal tube OD. Fiberglass size names identify dimensional fit; choose a cutting tool suitable for the tube material.
For a different tube manufacturer or an uncertain fit, send us the measured outside diameter before ordering.