# Fuse-to-Mast connection Tapered Vs Prismatic **URL:** \ **Category:** Foils and Boards - Gear Talk\ **Tags:** science, industry\ **Created:** [February 5, 2025, 5:41am UTC](https://forum.progressionproject.com/t/fuse-to-mast-connection-tapered-vs-prismatic/8581 "2025-02-05T05:41:23Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Evan](https://avatars.discourse-cdn.com/v4/letter/e/54ee81/32.png) [@Evan](https://forum.progressionproject.com/u/Evan)\ **Post date:** [February 5, 2025, 5:41am UTC](https://forum.progressionproject.com/t/fuse-to-mast-connection-tapered-vs-prismatic/8581/1 "2025-02-05T05:41:23Z")
The Axis fuse-to-mast connection works by having a block on the mast fit into a cavity on the fuse- just like Lift, Unifoil, Gong, and several others. For Axis, the bock’s right and left sides are parallel (aka prismatic) and are slightly under 15 mm apart. Axis’s fuse cavity has parallel sides as well that are slight over 15mm apart. Questions: Do Lift, Unifoil, Gong, and others with the block-in-cavity setup also have this prismatic setup? Or do they have a tapered connection? What are the advantages and disadvantages of tapered vs prismatic? To be 100% clear, I asking about the taper in the connection surface only, not the taper over the length of the mast. ---
**Author:** ![silas](https://avatars.discourse-cdn.com/v4/letter/s/839c29/32.png) [@silas](https://forum.progressionproject.com/u/silas)\ **Post date:** [February 5, 2025, 6:56am UTC](https://forum.progressionproject.com/t/fuse-to-mast-connection-tapered-vs-prismatic/8581/2 "2025-02-05T06:56:04Z")
Gong is tapered. ---
**Author:** ![andiabel](https://avatars.discourse-cdn.com/v4/letter/a/c77e96/32.png) [@andiabel](https://forum.progressionproject.com/u/andiabel)\ **Post date:** [February 5, 2025, 2:30pm UTC](https://forum.progressionproject.com/t/fuse-to-mast-connection-tapered-vs-prismatic/8581/3 "2025-02-05T14:30:42Z")
Uni is tapered. Main reason is to account for tolerances due to production and wear to minmise play. Are you sure axis is not tapered, never looked at them closely, but doesn’t make much sense to me? ---
**Author:** ![Darripah](https://avatars.discourse-cdn.com/v4/letter/d/aeb1de/32.png) [@Darripah](https://forum.progressionproject.com/u/Darripah)\ **Post date:** [February 5, 2025, 2:39pm UTC](https://forum.progressionproject.com/t/fuse-to-mast-connection-tapered-vs-prismatic/8581/4 "2025-02-05T14:39:57Z")
My uni wings can be mounted to the mast in either direction, correctly , and backwards. Doesn’t that mean they’re not tapered ? ---
**Author:** ![Velocicraptor](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@Velocicraptor](https://forum.progressionproject.com/u/Velocicraptor)\ **Post date:** [February 5, 2025, 2:42pm UTC](https://forum.progressionproject.com/t/fuse-to-mast-connection-tapered-vs-prismatic/8581/5 "2025-02-05T14:42:20Z")
Just means its symmetrically tapered. ---
**Author:** ![beepityboppityboop](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.progressionproject.com/beepityboppityboop/32/6245_2.png) [@beepityboppityboop](https://forum.progressionproject.com/u/beepityboppityboop)\ **Post date:** [February 5, 2025, 3:30pm UTC](https://forum.progressionproject.com/t/fuse-to-mast-connection-tapered-vs-prismatic/8581/6 "2025-02-05T15:30:43Z")
Axis is diagonal front and back (tapered) but straight up and down on the sides ---
**Author:** ![FSM](https://avatars.discourse-cdn.com/v4/letter/f/ccd318/32.png) [@FSM](https://forum.progressionproject.com/u/FSM)\ **Post date:** [February 5, 2025, 3:55pm UTC](https://forum.progressionproject.com/t/fuse-to-mast-connection-tapered-vs-prismatic/8581/7 "2025-02-05T15:55:56Z")
Lift tapered. Code tapered. ---
**Author:** ![noripplez](https://avatars.discourse-cdn.com/v4/letter/n/cdc98d/32.png) [@noripplez](https://forum.progressionproject.com/u/noripplez)\ **Post date:** [February 5, 2025, 4:06pm UTC](https://forum.progressionproject.com/t/fuse-to-mast-connection-tapered-vs-prismatic/8581/8 "2025-02-05T16:06:46Z")
Cabrinha is tapered ---
**Author:** ![mattllew](https://avatars.discourse-cdn.com/v4/letter/m/e19b73/32.png) [@mattllew](https://forum.progressionproject.com/u/mattllew)\ **Post date:** [February 5, 2025, 6:24pm UTC](https://forum.progressionproject.com/t/fuse-to-mast-connection-tapered-vs-prismatic/8581/9 "2025-02-05T18:24:56Z")
I’m no engineer but tapered is surely better in every way. It’s self tightening even if material is worn away. I’ve heard axis masts have to be repotted occasionally to prevent play/wobble. Taper has been used in Tuttle boxes for windsurf fins for 40 odd years. ---
**Author:** ![andiabel](https://avatars.discourse-cdn.com/v4/letter/a/c77e96/32.png) [@andiabel](https://forum.progressionproject.com/u/andiabel)\ **Post date:** [February 6, 2025, 7:41pm UTC](https://forum.progressionproject.com/t/fuse-to-mast-connection-tapered-vs-prismatic/8581/10 "2025-02-06T19:41:11Z")
Try riding the mast with the trailing edge fwd…did that once by accident, feels sooo weird haha…