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Engineered-to-Order · Certified Quality · Fast Turnaround

Custom Stainless Steel Sprockets
for Wastewater Treatment

From one-off custom builds to standard replacements — we engineer sprockets for bar screens, grit classifiers, sludge scrapers, aeration systems and every other chain-driven machine in your treatment plant. Manufactured from certified AISI 304 / 316L / Duplex stainless steel, built to your exact drive specification.

Explore Capabilities Submit Your Specs

From Standard to One-of-a-KindWe build to your exact drive specs

Stainless That Stays StainlessAISI 304, 316L, Duplex with certs

Full TraceabilityEN 10204 Type 3.1 with every order

Fast-Track AvailableBecause downtime costs more than the part

The Challenge

Why Off-the-Shelf Sprockets Can’t Handle Wastewater

Water treatment plants operate 24/7 in one of the most punishing environments for power transmission components. Standard industrial sprockets — designed for clean, dry conditions — fail prematurely when exposed to the realities of treatment plant service. Here is what makes this industry different.

Continuous Corrosive Exposure

Submerged or semi-submerged in screened effluent, chemically dosed water, and corrosive sludge. Carbon steel sprockets rust rapidly; stainless steel is not a luxury — it is a requirement for acceptable service life.

Fibrous & Abrasive Debris

Wastewater carries rags, fibrous material, sand, and grit that wrap around hubs, jam tooth spaces, and accelerate wear. Standard tooth profiles are not designed for this — custom geometry is often necessary to shed debris rather than accumulate it.

Minimal Maintenance Windows

Treatment plants cannot shut down for extended periods. A sprocket replacement that requires shaft disassembly can mean 8-12 hours of downtime. Designs that enable rapid field service are not optional — they directly impact plant availability.

Non-Standard Drive Systems

Treatment equipment frequently uses engineered-class chains (M-series, heavy-duty scraper profiles) with non-standard pitches, tooth counts, and hub dimensions. Standard catalog sprockets rarely match — custom engineering is the rule, not the exception.

Our Capabilities

What We Engineer

We design and manufacture custom sprockets for every wastewater treatment drive system. From material selection to tooth geometry, every detail is specified for your application.

Materials Sprocket Types Standard & Custom

AISI 304 Stainless Steel

Standard grade for most wastewater applications. Excellent corrosion resistance in municipal effluent, storm water, and mildly chemical environments. Cost-effective for general duty.

Good general corrosion resistance
Cost-effective for standard-duty service
EN 10204 3.1 certified material

AISI 316L Stainless Steel

Enhanced with molybdenum for superior pitting and crevice corrosion resistance. Recommended for high-chloride environments, chemical dosing areas, saltwater exposure, and aggressive industrial effluent.

Superior pitting & crevice resistance
Low carbon prevents weld sensitization
Ideal for coastal & chemical plants

Duplex & Super Duplex

For the most demanding environments — high chlorides, acidic conditions, or abrasive sludge. Twice the yield strength of 316L with exceptional resistance to chloride stress corrosion cracking.

Very high strength & wear resistance
Excellent chloride SCC resistance
Extended life in harsh conditions

Carbon Steel + Coating

Economical option for dry or low-corrosion areas — above-water drive ends, indoor mechanical rooms. Available with hot-dip galvanized, epoxy, or DLC coating for extended life.

Cost-effective for non-corrosive zones
Optional protective coatings available
Same precision CNC machining standard

Solid Sprockets

One-piece design precision-machined from solid billet or plate. Ideal for high-speed drives, minimum-deflection applications, or where shaft access is straightforward.

Maximum concentricity & strength
Suitable for moderate-to-heavy duty
Keyway & set screw standard

Split Sprockets

Two machined halves that bolt together around the shaft. Replacement without disturbing bearings, chain guides, or drive-end assemblies — essential for confined channel installations.

Field replacement in <30 minutes
No shaft removal required
Dowel-pin alignment for concentricity

Fabricated Multi-Piece

Multiple flat sprocket plates mounted on a separate hub using through-bolts. Each plate independently replaceable. Ideal for large-diameter drives and multi-rake screening systems.

Individual plate replacement
Large diameters without single casting
Custom plate count & bolt pattern

Custom Tooth Profiles

Standard tooth forms (BS/ANSI/DIN) and proprietary profiles — debris-shedding roots, crowned flanks for misalignment tolerance, hardened facings for abrasive grit.

Debris-clearing root geometry
Anti-wrap tooth flank profiles
Optional induction-hardened flanks

From Standard Catalog to Full Custom — We Cover the Spectrum

Not every project needs a ground-up custom design. If your chain type and tooth count match a standard size, we can supply it in your material of choice. When you need something unique — and in wastewater treatment, that is common — we engineer it from scratch.

We can work from:

A technical drawing — PDF, DXF, or any CAD format
A physical sample — we reverse-engineer and improve
A chain specification — chain type, pitch, tooth count, bore
An idea — tell us what you need it to do

Before production begins, we provide an engineering drawing for your review and approval — no surprises, no mismatched dimensions.

Our process:

1

You send us your requirementsChain type, pitch, teeth, bore, material, or a drawing / sample

2

We review and provide a quoteIncluding lead time and any engineering recommendations

3

Engineering drawing for your approvalWe send you the CAD drawing before we cut any material

4

Manufacturing & inspectionCNC machined from certified material, fully inspected

5

Shipped with documentationInspection report, material certs, and packing list

Submit Your Sprocket Requirements

Fill in what you know. We will get back to you with a quote and lead time — usually within 1-2 business days.

Featured Project

Lower Drive Sprocket for Multi-Rake Screening System

We designed and manufactured a custom fabricated multi-piece sprocket for Sulzer MevaScreen® MRS — one example of how our engineering approach solves real-world maintenance and reliability challenges.

Case Study Sulzer MevaScreen® MRS

Fabricated Sprocket for Heavy-Duty Multi-Rake Bar Screen

The challenge: The Sulzer MevaScreen MRS — a multi-rake coarse/fine screen designed for channel widths up to 3,000 mm and discharge heights up to 20 meters — used a one-piece lower drive sprocket that required complete drive-end disassembly for replacement. In a confined channel installation, each replacement meant 8–12 hours of downtime.

Our solution: We engineered a multi-piece fabricated sprocket — three flat sprocket plates mounted on an independent hub using eight M16 A4-80 through-bolts with nylon-insert lock nuts. The design allows individual plate replacement, and the entire assembly can be serviced without disturbing the shaft, bearings, or chain guide.

"Replacement time reduced from 8+ hours to under 30 minutes — with no specialized tooling required."

The same engineering approach — analyzing the chain type, operating conditions, and maintenance constraints — applies to any screening system, regardless of OEM or configuration.

Chain TypeM112 (p=160mm)

TeethZ = 8

MaterialAISI 304 SS

Assembly Wt.33.6 kg

FastenersA4-80 / Nylon lock

Service Time< 30 min

Quality Assurance

Certified Materials, Traceable Production

Every sprocket we ship is backed by full material traceability, independent third-party certification, and documented quality control at every manufacturing stage.

EN 10204 Type 3.1 Certification

Mill-origin material certificate with full chemical composition and mechanical property data. Third-party verified where required.

Certified Composition & Properties

Every heat number documented — C, Si, Mn, Cr, Ni, Mo verified. Yield, tensile, elongation, and hardness tested per ASTM/EN/GB standards.

Dimensional Inspection

Tooth spacing, PCD, bore concentricity, split-joint fit, keyway tolerance, and surface finish checked per drawing. Inspection report included with every order.

DIN/ISO Standard Hardware

All fasteners to DIN 933 / DIN 985 / DIN 125A. A4-80 stainless steel as standard for corrosive environments. Nylon-insert lock nuts for vibration resistance.

Intergranular Corrosion Test

Optional GB/T 4334 Method E / ASTM A262 testing for stainless steel grades. Ensures material is properly solution-annealed and free of sensitization.

Surface & Heat Treatment

Solution-annealed and pickled (1D/No.1) as standard. Optional induction-hardened tooth flanks, DLC coating, or passivation for extended service life.

Where We Fit In

From the Intake Channel to the Digester — One Plant, Many Sprockets

A wastewater treatment plant uses chain-driven equipment at almost every stage of the process. Each machine places different demands on its drive components. That is why we custom-engineer sprockets for the specific duty, not the other way around.

Bar & Step Screens

Lower drive sprockets for mechanical bar screens, step screens, and multi-rake screening systems in intake and inlet channels.

Grit Classifiers & Washers

Sprockets for grit screw conveyors, cyclone feed systems, and grit washing equipment in primary treatment.

Sludge Scrapers & Thickeners

Chain and sprocket drives for sedimentation tank scrapers, gravity thickeners, and sludge collection mechanisms.

Aeration Systems

Drive sprockets for brush aerators, disc diffuser systems, and submersible mixer guide rails in biological treatment basins.

Screw Conveyors & Lifters

End-drive and intermediate sprockets for inclined screw conveyors, shaftless spiral conveyors, and screenings compactors.

Anaerobic Digestion

Sprockets for digester mixing systems, sludge recirculation pumps, and biogas handling equipment drives.

We also supply Engineering Conveyor Chains — designed and manufactured to match your sprocket specification for a fully compatible drive train. Sprockets and chains from a single source, guaranteed to work together.

Ready to Get Started?

Tell Us What You Need

We will respond with a detailed engineering proposal and quotation — usually within 1-2 business days.

Submit Your Requirements

CTS Chain Transmission

Transmit Force, Drive Future

We do not see ourselves as a supplier but rather as a business partner, working together with our customers to provide added value throughout the supply chain and beyond. We offer wholesale,customization services, inventory management, engineer calls, training and competitor repair/replacement programs, as well as a range of reliability services through our Customer Collaborative Field Service Program.

Tell us about your needs

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