Product Overview

#50 Stainless Steel Sprockets are engineered for ANSI No.50 roller chain at 5/8-inch pitch — a chain size that bridges the gap between light-duty conveyor drives and genuinely heavy power transmission in a single, versatile standard. At this pitch, the combination of stainless steel construction and ANSI-standard tooth form covers the most demanding hygiene-critical conveying and packaging applications, from high-speed bottling-line drives to slow-running bulk-product conveyors where loads and corrosion risk both run high.

Our #50 SS range offers two hub styles. Type B sprockets carry a machined hub (boss) with provision for a keyway or set-screw, making them the standard choice for driven-shaft mounting in most industrial applications. Type A (disc-type) sprockets have a flat plate profile with minimal hub projection, used primarily for idler duty, space-constrained applications, or as drive elements where the shaft engagement is provided by a separately mounted hub or bushing. Both types cover an extensive tooth-count range and directly replace Tsubaki RS50SS, Martin 50SS, Browning 50SS, and Rexnord equivalent stainless sprockets at factory-direct pricing.

Produced in 304-grade stainless steel at our Hangzhou CNC facility, the complete #50 SS range is dimensioned to ANSI B29.1. Custom bore, keyway, and taper-lock configurations are available with 7–12 working day lead times, allowing procurement teams to source finished-bore parts without paying the finishing premiums that European or North American distributors add to the base price of imported stainless components.

Chain Parameters

Type B Sprocket Dimensional Data

Type B (hubbed) sprockets are the standard driven-shaft configuration. Part numbers follow the 50BxxSS format. Outside diameter, type, stock bore, maximum bore, hub diameter, hub length, and weight are listed for each tooth count.

Type A Sprocket Dimensional Data

Type A (disc-type) sprockets are flat-plate configuration for idler and space-constrained applications. Part numbers follow the 50AxxSS format. Dimensions reflect the minimal-hub profile.

Manufacturing Quality & Process Controls

The #50 chain pitch (5/8 inch) sits at a size where manufacturing tolerance becomes especially important: the 0.400-inch roller is large enough that small errors in the seating-curve radius produce visible roller-bounce during engagement, detectable as vibration and measurable noise. Our CNC hobbing programme for #50 sprockets maintains seating curve accuracy within the ANSI B29.1 tolerance band, verified by optical comparator on the first article of each batch and by statistical sampling thereafter.

Bore machining on Type B sprockets is performed to H7 or standard imperial fit dimensions on CNC turning centres. The hub bore is the most dimensionally critical feature of a finished-bore sprocket — an oversize bore allows the sprocket to wobble on the shaft, producing cyclic runout that accelerates chain wear and can cause premature sprocket failure. Our bore machining process holds standard tolerance on every production run, with gauging records retained for traceability.

Application Sectors

The #50 pitch range covers drives from small bottling-line feedscrews to large agricultural conveyor drives. The table below maps the most common application sectors to the recommended product configuration.

Matching Drive Components We Supply

Every #50 SS drive system needs matched chain and hardware beyond the sprocket itself. We stock and supply all components below for consolidated shipment alongside your sprocket order.

Customer Reviews

Lead Times & Ordering

Type B and Type A stock-bore units ship within 3–6 business days. Custom bore, keyway, or taper-lock orders: 8–12 business days after drawing sign-off. MOQ: 1 piece (stock); 10 pieces (custom). Volume pricing available from 50 pieces per SKU; annual blanket-order programmes available for high-volume users.

Frequently Asked Questions