Sprocket and Shaft Assembly

Complete, ready-to-install drive and tail sprocket assemblies for chain bucket elevators & chain conveyor. Each kit ships fully machined, dynamically balanced, and test-mounted so your maintenance crew can “fit, torque, and run” with minimal shutdown time.

What’s in a Constromech Assembly?

Sub-assembly	Standard Scope	Optional / Spare Items
Sprocket Rim (drive / idler)	One-piece or 3-/6-piece segmented rim in quenched-and-tempered alloy steel; precise Pitch Circle Diameter (PCD) matched to chain size	Spare rim segments; full replacement rims
Replaceable Teeth (DDA / ASP profiles)	Bolt-on or weld-on teeth, case-hardened to 50–55 HRC for extreme wear life	Extra tooth sets, shim plates, mounting hardware
Hub	CNC-bored, key-seated, and stress-relieved steel hub; concentricity ≤ 0.03 mm	Split hubs for confined installs; taper-lock bushings
Shaft	Solid or hollow alloy-steel shaft, optional induction-hardened journal zones; supplied with keyways and endcaps	Spare shafts, woodruff keys, locking assemblies
Bearing Blocks	Plummer blocks with double-row spherical-roller bearings; factory-packed with high-temp grease	Labyrinth seals, felt rings, bearing spacers
Sealing System	Dual labyrinth or contact seals + flinger discs to keep dust and clinker fines out of bearings	Spare seal kits, grease nipples
Torque Limiter / Backstop (drive end)	Optional overrunning clutch or hydraulic torque arm for anti-rollback protection	Replacement backstop elements
Fasteners & Shims	8.8 or 10.9 grade bolts, nuts, and spring washers to DIN standards	Full bolt packs, spacer kits

All components arrive match-marked and serialized for traceability and ease of re-ordering.

Technical Design Highlights

Finite-Element-verified tooth geometry ensures uniform stress distribution and maximizes chain and tooth life.
Pitch accuracy: PCD tolerance ±0.25 mm; axial run-out ≤ 0.05 mm—guarantees smooth chain engagement and reduced vibration.
Induction-hardened tooth flanks (4–6 mm case depth) resist abrasive wear from clinker, slag, and limestone.
Dynamic balancing to G 6.3 (ISO 1940-1) at operating speed prevents premature bearing failure on high-RPM return stations.
Surface shot-peening of rims and teeth improves fatigue strength by up to 30 %.
Pre-greased & plug-sealed bearings mean no field lubrication before start-up.

Operational Advantages

Plug-and-Play Installation
- Pre-assembled shaft–hub–bearing package drops straight into existing pillow-block pedestals or flange interfaces.
Reduced Downtime
- Segmented rims and replaceable teeth allow one-man replacement without pulling the shaft.
Extended Service Life
- Superior metallurgy, deeper case depth, and precision machining cut wear rates, slippage, and chain whip.
Energy Efficiency
- Perfect tooth–chain meshing reduces friction losses and motor load.
Predictive-Maintenance Friendly
- All wear parts (teeth, seals, bearings) are stocked as spares with identical serial references; vibration and temperature points clearly indicated on the hub for sensor mounting.

Why Buy from Constromech

Advantage	What It Means for You
Full Customisation	Any chain size (10 × 28 mm → 38 × 144 mm), any tooth count, solid or split rims, exotic alloys for corrosive media
Integrated Supply	Chains, sprockets, shafts, hubs, shackles, buckets, and fastening hardware from a single source—no compatibility guesswork
Rapid Turnaround	Standard assemblies ship in 1–2 weeks; emergency express rebuilds within 72 hours
Certified Quality	ISO 9001 shop, ultrasonic weld inspection, 200 % proof-load test, material & heat-treatment certificates supplied
On-Site Support	Alignment supervision, torque-check commissioning, and operator training available worldwide

Upgrade Path & Retrofits

Whether you’re modernising a 40-year-old clinker line or building a new 120 m-high elevator, Constromech delivers turnkey sprocket-and-shaft kits that slot straight into your casing—with zero field machining and minimal alignment work.

Ready to maximise uptime?
Contact Constromech for drawings, finite-element stress reports, or a fast quotation tailored to your elevator geometry and duty cycle.