Sprocket and Shaft Assembly
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.
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.
SL DRIVE SPROCKET TABLE
DDA SPROCKET TOOTH
NOTE: Moun ng parts: hex. socket head cap screw DIN 7984 – 8.8; spring washer DIN 127 and hex. nut DIN 934 – 8. Individual teeth with a shim plate the screw length have to be advised.
ASP CHAIN SPROCKET
