Technical Overview

Product Overview

#80 Stainless Steel Sprockets are the largest-pitch standard stainless sprocket in the ANSI chain family — built for No.80 roller chain at 1-inch pitch, with a 0.625-inch roller and 5/8-inch inner width that define a component operating in the heavy-duty industrial tier of power transmission. At this scale, sprocket tooth counts from 10T through 40T produce outside diameters from 3.68 inches on the smallest to 13.31 inches on the largest, and part weights from 2.14 pounds to 26 pounds — numbers that reflect the structural significance of these components in the drives they serve.

Manufactured in 304-grade stainless steel or C45 carbon steel (HF-quench hardened) at our Hangzhou facility, the #80 SS range directly replaces Tsubaki RS80SS, Martin 80SS, Browning / Rexnord 80SS, Renold No.16B stainless, and equivalent heavy-series sprockets from Dodge and Emerson. Machine builders and industrial maintenance teams who previously sourced these parts through North American or European distributor networks can access factory-direct pricing from Ever-Power at 40–60% below typical distributor-stocked brand pricing, with equivalent or superior dimensional accuracy and full material documentation.

The 1-inch pitch of No.80 chain places this combination in applications where conveying loads, torque levels, and drive-shaft sizes are all meaningfully large. Agricultural combine main drives, heavy industrial conveyors, timber-deck machinery, mining-support equipment, large-format packaging machinery, and heavy-duty marine deck equipment all commonly use No.80 chain and sprockets where No.60 chain would be undersized for the application requirements.

Complete Dimensional Specifications — #80 SS

All standard tooth counts from 10T to 40T. Outside diameter, stock bore, maximum bore, hub diameter, hub length, and weight in US customary units. All sprockets Type B (hubbed) configuration unless otherwise specified.

Manufacturing Precision at Large Scale

Heavy-pitch sprockets at the #80 scale amplify the consequences of dimensional error. A runout error of 0.010 inch in bore concentricity on a 1-inch pitch sprocket produces a chain-tension variation with every revolution that would be negligible on a 3/8-inch pitch sprocket but is significant on a No.80 drive transmitting several kilowatts. Our production process for #80 SS sprockets addresses this through a combination of controlled fixturing during hobbing, bore finishing in a separate CNC turning operation after hobbing (ensuring the bore is concentric with the pitch circle, not just with the blank OD), and runout measurement on completed parts before release.

For large tooth counts (25T and above), we perform 100% visual inspection of tooth form and surface finish before packing. Parts are individually banded to wooden pallets for export to prevent the flatness distortion that can occur when heavy sprockets are stacked in cartons during long sea-freight transits. Material certificates and dimensional records are retained for five years from the shipment date, supporting the traceability requirements of regulated-industry buyers in food, pharmaceutical, and defence sectors.

C45 carbon steel variants with high-frequency induction hardening are available for applications where tooth-surface hardness (40–50 HRC on flanks, tough ductile core) is more critical than corrosion resistance. Agricultural combine main drives, mining conveyor head-shaft sprockets, and heavy-timber-deck machinery are the primary C45 HF-quench applications in the #80 range. Hardness test certificates are available on request for C45 HF-quenched parts.

Performance Features

Heavy-Duty Application Sectors

Matching Components for No.80 Drives

The No.80 chain drive system requires matched components beyond the sprocket. We stock and supply all items below, enabling single-source consolidated ordering for complete drive system builds or refurbishments.

Customer Reviews

Ordering Process & Lead Times

Standard stock-bore #80 SS sprockets ship within 4–7 business days for tooth counts to 25T. Larger tooth counts (30T, 35T, 40T) may require 8–10 business days due to the extended hobbing and boring cycle for heavy-gauge billets at this pitch. Custom bore, keyway, or taper-lock orders: 12–18 business days from drawing confirmation. For large-tooth-count custom bores, allow 15–20 business days. MOQ: 1 piece (stock); 10 pieces (custom). Volume pricing from 20 pieces per part number; blanket-order agreements available for annual supply programmes.

Frequently Asked Questions