Wheel Rim & Shaft Assembly
Fit-and-run wheel-rim and shaft packages for chain bucket elevators. Toothless pocket wheels with modular steel segments cradle each link to cut point wear, shock loading and noise.
- 34 standard sizes
- Made to your drawing
Dimensions
Find your size
Choose the type, then pick a size to see its dimensions, then request a quote for exactly that size.
Selected — COA series (12 segments)
10 · 400
- t (mm)
- 35/45
- m (mm)
- 15
- n (mm)
- 35
- o (mm)
- 80
- p (mm)
- 420
- l (mm)
- 12
- Segments per wheel
- 12
Size not listed? We manufacture to your drawing or sample —send us your requirement.
View all 17 sizes (full table)
| PCD (mm) | Chain Ø p (mm) | t (mm) | m (mm) | n (mm) | o (mm) | p (mm) | l (mm) | Segments per wheel |
|---|---|---|---|---|---|---|---|---|
| 400 | 10 | 35/45 | 15 | 35 | 80 | 420 | 12 | 12 |
| 400 | 13 | 45/56 | 18 | 48 | 80 | 420 | 12 | 12 |
| 500 | 13 | 45/56 | 18 | 48 | 100 | 525 | 12 | 12 |
| 500 | 16 | 56/63 | 21 | 51 | 100 | 525 | 12 | 12 |
| 630 | 16 | 56/63 | 21 | 51 | 160 | 650 | 12 | 12 |
| 630 | 18 | 63/70 | 23 | 59 | 160 | 650 | 12 | 12 |
| 630 | 20 | 70/80 | 25 | 65 | 160 | 650 | 12 | 12 |
| 710 | 20 | 70/80 | 25 | 65 | 160 | 750 | 12 | 12 |
| 800 | 23 | 80/91 | 28 | 68 | 160 | 850 | 15 | 12 |
| 800 | 26 | 91/105 | 32 | 78 | 160 | 850 | 15 | 12 |
| 900 | 26 | 91/105 | 32 | 78 | 190 | 950 | 15 | 16 |
| 1000 | 30 | 105/126 | 36 | 96 | 200 | 1050 | 15 | 16 |
| 1250 | 30 | 105/126 | 36 | 96 | 220 | 1300 | 15 | 16 |
| 1250 | 36 | 126/136 | 42 | 112 | 220 | 1300 | 15 | 16 |
| 1400 | 39 | 136/147 | 45 | 125 | 240 | 1450 | 15 | 18 |
| 1400 | 42 | 147 | 48 | 128 | 260 | 1450 | 15 | 18 |
| 1500 | 42 | 147 | 48 | 128 | 260 | 1550 | 15 | 18 |
Selected — CBA series (6 segments)
10 · 400
- t (mm)
- 35/45
- m (mm)
- 15
- n (mm)
- 35
- o (mm)
- 80
- p (mm)
- 420
- l (mm)
- 12
- Segments per wheel
- 6
Size not listed? We manufacture to your drawing or sample —send us your requirement.
View all 17 sizes (full table)
| PCD (mm) | Chain Ø d (mm) | t (mm) | m (mm) | n (mm) | o (mm) | p (mm) | l (mm) | Segments per wheel |
|---|---|---|---|---|---|---|---|---|
| 400 | 10 | 35/45 | 15 | 35 | 80 | 420 | 12 | 6 |
| 400 | 13 | 45/56 | 18 | 48 | 80 | 420 | 12 | 6 |
| 500 | 13 | 45/56 | 18 | 48 | 100 | 525 | 12 | 6 |
| 500 | 16 | 56/63 | 21 | 51 | 100 | 525 | 12 | 6 |
| 630 | 16 | 56/63 | 21 | 51 | 160 | 650 | 12 | 6 |
| 630 | 18 | 63/70 | 23 | 59 | 160 | 650 | 12 | 6 |
| 630 | 20 | 70/80 | 25 | 65 | 160 | 650 | 12 | 6 |
| 710 | 20 | 70/80 | 25 | 65 | 160 | 750 | 12 | 6 |
| 800 | 23 | 80/91 | 28 | 68 | 160 | 850 | 15 | 6 |
| 800 | 26 | 91/105 | 32 | 78 | 160 | 850 | 15 | 6 |
| 900 | 26 | 91/105 | 32 | 78 | 190 | 950 | 15 | 8 |
| 1000 | 30 | 105/126 | 36 | 96 | 200 | 1050 | 15 | 8 |
| 1250 | 30 | 105/126 | 36 | 96 | 220 | 1300 | 15 | 8 |
| 1250 | 36 | 126/136 | 42 | 112 | 220 | 1300 | 15 | 8 |
| 1400 | 39 | 136/147 | 45 | 125 | 240 | 1450 | 15 | 8 |
| 1400 | 42 | 147 | 48 | 128 | 260 | 1450 | 15 | 8 |
| 1500 | 42 | 147 | 48 | 128 | 260 | 1550 | 15 | 8 |
Construction Features
Rim Segments
Technical Detail: Precision-machined alloy steel, case-hardened 45–55 HRC
Benefit: High wear resistance; easy individual replacement
Pocket Geometry
Technical Detail: Contoured to chain Ø & pitch; ±0.25 mm pocket tolerance
Benefit: Uniform load, low chain slap, quieter running
Split Hub
Technical Detail: Two-piece or fit hub keyed to shaft
Benefit: Fast swap-out with minimal lift of neighbouring equipment
Wheel Body
Technical Detail: Stress-relieved steel plate or cast center disc
Benefit: Lightweight yet rigid; balanced to ISO G 6.3
Shaft
Technical Detail: Hardened journals, ground to H7; supplied drilled & tapped
Benefit: Direct fit into CMECH or OEM bearing blocks
Fastener Set
Technical Detail: Customised grade bolts, washers, torque chart supplied
Benefit: Secure clamp force under vibration & heat cycles
Performance Advantages in Elevator Service
- Extended Chain Life – Pocket support along ~120° of the link circumference lowers bearing pressure by up to 40 % versus toothed wheels.
- Reduced Maintenance – Segments can be swapped individually through the elevator casing window—no shaft removal required.
- Lower Noise & Vibration – Tooth-free engagement eliminates impact, cutting sound pressure levels by 6–8 dB.
- Hot-Material Capability – COA series segments maintain hardness above 350 °C, ideal for clinker exits.
- Energy Savings – Smooth rolling contact trims motor amperage, typically saving 3–5 % drive power.
Supplied-as-One “COA / CBA Assembly Kit”
- Wheel rim (segmented) pre-mounted on hub
- Machined shaft with keyways, endcaps & retainer nuts
- Spacer rings / shims to match exact elevator casing width
- Plummer-block bearings (optional) greased & sealed for 200 °C continuous duty
- Installation torque sheet, 3-D model & QA dossier (material, hardness & balance certificates)
Arrives palletised, match-marked and ready to bolt in—fit, torque, run
Why Choose Constromech?
Made-to-Measure
Any PCD from 400 mm to 1 000 mm; custom pocket shapes for worn chains
Rapid Segment Supply
Stock sets for popular 16 × 64 mm & 22 × 86 mm chains—ship in 48 h
One-Stop Package
Chains, wheels, shafts, bearings, boot blocks and shackles from a single source
Field Engineering
Alignment, vibration analysis and torque verification on request
Lifecycle Cost Down
Lower spare-parts spend and 50 % faster turnaround than conventional wheels
Ready to Upgrade?
Specifications of toothless chain wheels with modular steel segments, CMECH Type COA series
Specifications of toothless chain wheels with modular steel segments, CMECH Type CBA series
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View sizes & detailsNeed wheel rim & shaft assembly for your plant?
Send us your drawing or requirement — we respond within one business day.