Multiquip 1161-1 Spider Plate 1-1/8" 4-Blade Silver

The Multiquip 1161-1 is a genuine OEM Spider Plate 1-1/8" 4-Blade Silver designed for Whiteman walk-behind power trowels across the BS, BH, JS, JH, and B46 series. As a direct OEM replacement, this part meets the original design specification for blade count, hub bore size, and finish — so it installs the same way the factory part did. Verified fitment spans a wide range of Whiteman and international walk-behind trowel models including BS90C, BH11C, BH90C, JS60C, JH90C, JH55C, B46, J36E2, BS46H11, BS46H90, JS36H90, JS36H55, and B46S90. Sourcing the correct OEM spider plate keeps your finishing rig running at the right blade pitch and operational balance from the first pour.

Key Features

• OEM Hub Bore Accuracy — The 1-1/8" bore dimension matches the original shaft specification exactly, ensuring the plate seats and locks without slop or play.
• 4-Blade Configuration — Engineered to accept four trowel blades in the correct radial spacing for balanced rotation and consistent surface finish across the full sweep diameter.
• Silver Finish for Corrosion Resistance — The factory silver finish provides protection against the wet concrete environment trowel spider plates are routinely exposed to during finishing operations.
• Broad Walk-Behind Trowel Fitment — Covers BS90C, BH11C, BH90C, JS60C, JH90C, JH55C, B46, J36E2, BS46H11, BS46H90, JS36H90, JS36H55, and B46S90 in a single part number.
• Blade Pitch Stability — A worn or cracked spider plate causes uneven blade angle and erratic trowel behavior; replacing with part 1161-1 restores consistent pitch control across all four blades.
• Genuine Multiquip OEM Part — Supplied as an authentic Multiquip component, carrying the same part number referenced in OEM service documentation for supported trowel models.

The spider plate is the central hub assembly that mounts to the gearbox output shaft of a walk-behind power trowel and holds the finishing blades in position. It transfers rotational force from the gearbox to the blades while allowing the operator to adjust blade pitch for different stages of the concrete finishing process. When a spider plate cracks, bends, or wears at the hub bore, blade pitch becomes inconsistent across the rotation, leading to uneven surface texture, machine vibration, and potential blade contact with the slab — making timely replacement critical to both finish quality and safe operation.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.