Ergonomic helm seat frame — rotomoulded HDPE (660 × 610 × 508 mm)

Ergonomic helm seat frame — rotomoulded HDPE (660 × 610 × 508 mm)

Name: Ergonomic helm seat frame — rotomoulded HDPE (660 × 610 × 508 mm)
Brand: Osculati
SKU: 48.680.14
Price: 144.50 EUR
Availability: InStock

€144,50

incl. VAT 25.5%

Rotomoulded polyethylene seat frame — the structural base for a fully custom helm seat. Build your own seat using this frame + the cushions and bolsters of your choice.

660 × 610 × 508 mm (D × H × W) — fits standard 5–9 m helm positions
Brass threaded inserts in the base for solid, repeatable cushion fasteners
Rotomoulded HDPE shell — no rust, no rot, no UV degradation
Bottom socket for standard pedestal posts (sold separately)

Cushions sold separately — pair with osculati-45865 (RM52 flip-up bolster), osculati-26771 (H54), osculati-28146 (H52) or upholster a custom cover. Frame only — DIY build for the seat that fits your boat exactly.

In stock

90 % of orders ship within 3 business days

Free shipping on orders over €100 · Free returns within 14 days

Use cases

Build your own helm seat

Combine this frame with cushions of your choice — Osculati's RM52 / H52 / H54 padded seats, or custom upholstery for boat-specific fabric. Frame is the structural base; the seat 'character' comes from your cushion choice.

Replacement frame for damaged seats

If your existing helm seat's plastic shell is cracked or UV-damaged but the cushions are still good, this is the drop-in structural replacement. Same brass-insert pattern as the most common Osculati helm seat lineage.

Trim-shop custom builds

Trim shops use this frame to build to-order helm seats for refit projects — frame is generic, the upholstery is custom to match the boat. Faster turnaround than building a seat from raw foam + plywood.

Specifications

Depth mm660

Height mm610

Width mm508

BrandOsculati

TypeHelm seat structural frame (cushions sold separately)

MaterialRotomoulded HDPE (high-density polyethylene)

Dimensions (D × H × W)660 × 610 × 508 mm

Pedestal mountBottom socket for standard Ø73 mm helm pedestals (sold separately)

Cushion attachmentBrass threaded inserts in the base

Suitable boat length5–9 m runabouts, walkarounds, small cruisers

Weight5.5 kg

Made inItaly

Country of originItaly

Installation guide

Plan your build — frame + cushions + pedestal

This product is the FRAME only. You'll need: (1) this frame, (2) cushions/bolster (e.g. osculati-45865 RM52, or a custom upholsterer's set), (3) a helm pedestal post sized for your boat (sold separately, Ø73 mm standard).

Mount the pedestal first

Fix the helm pedestal base to a structural member (not deck core) using through-bolts and backing plates. Bed each fastener in marine sealant. Pedestal vertical or use a slider/swivel base — your call by ergonomics.

Drop the frame on the pedestal

The frame's bottom socket fits standard Ø73 mm pedestal posts. Lower the frame on, swivel-test the rotation, confirm sightline over the helm at your normal driving posture before any cushion install.

Attach cushions to the brass inserts

The frame has brass threaded inserts in the base — these are the structural mounts for cushions. Don't drill new holes in the HDPE shell (weakens the structure). Use M6 stainless bolts through cushion brackets into the inserts.

Test before adding bolster

Sit, recline, lean — make sure the seat angle and depth feel right with bare cushions. If you're adding a flip-up bolster (e.g. RM52), test that the bolster clears the dashboard at both up and down positions before committing.

Documents