HSI Cheat Sheet: Match the Model to the Mission

SP: Primary Models

Designed for primary crushing, SP models range from 350 to 700 horsepower. The smallest handles feed up to 24 inches, while the largest processes up to 40 inches.

SP models include a cast monoblock primary curtain with replaceable wear tips and a fabricated secondary curtain with replaceable liners. Adjusting curtain settings helps dial in the desired product size.

“These models also feature fabricated, open-style rotors, which can be configured with two, three or four blow bars,” says Adcock. “Bar count can affect things like fragmentation, wear life, and throughput."

For example, a four-bar rotor typically produces finer material and higher capacity, while fewer bars may lead to coarser product.

Originally, SP models were available with either two- or four-bar rotor setups, but a three-bar option was recently added for more flexibility.

“We’re trying to cater to many different applications,” says Adcock. “Some customers prefer a three-bar rotor simply because it’s what they’re used to running.”

SS: Secondary Models

The SS range includes four Sentry HSI models, spanning 150 to 800 horsepower. They feature a slightly smaller feed opening and incorporate a multi-curtain design to control reduction.

“These have fabricated primary and secondary curtains with replaceable liners,” says Adcock. “They also feature a fabricated open-style rotor, available in two-, three-, and four-bar configurations.”

All four SS models can also be equipped with an optional grinding path, a feature that's often confused with a third curtain.

Unlike a third curtain, which is usually fixed, a grinding path is an adjustable component. It’s designed as a retractable cartridge that can be moved closer to the rotor. This creates an additional stage of reduction, improving the final product shape or size consistency when needed.

SR: Recycle Models

Superior also offers Sentry HSI models specifically designed for recycling and demolition applications. The SR line is built to handle tough, irregular material like slabby concrete and rebar.

There are three SR models available, all featuring larger feed openings to better accommodate harsh, oversized material.

Additionally, SR models are built with a cast primary curtain with replaceable ends, a fabricated secondary curtain with replaceable ends or liners, and a cast-enclosed rotor.

“Whether it’s rebar, steel rods, or any kind of matting, the tramp won't get tangled up like it might in a traditional open-style rotor,” says Adcock.

Among the lineup — which also can be configured with two, three, or four blow bars — the SR4250 has proven to be the most popular.

“That was the one that kicked us off,” says Adcock. “It’s the same model we brought to CONEXPO-CON/AGG mounted on a portable plant in 2023.”

The larger SR5165 is gaining strong traction in the field, while the compact SR3936 is showing promising potential for future growth as demand increases for smaller, more versatile machines.