CHA 80/2/80 Shaft Mounted Speed Reducer (Ø80 mm hollow output shaft)
CHA 80/2/80 shaft mounted speed reducer — Chiaravalli's pendular gear unit, made for belt conveyors: size 80, two-stage, ratios 15:1 to 20:1, hollow output shaft Ø80 mm G7, keyway 22 mm wide (BB), 85.4 mm bore-to-key height (BH). Solid input shaft Ø48 mm, key 14 mm wide (DB), 51.5 mm shaft-to-key height (DH). GG20 painted cast iron case, ground 21NiCrMo2 gears — high efficiency, low noise, easy mounting. A backstop device can be fitted on request so the conveyor cannot run back on an incline (state the free direction of rotation when ordering). A torque tension arm (M16 rod, length 260–410 mm) is available for this size — see the torque arm sheet.
Supplied without oil. Oil-bath lubrication; fill about 11 l of ISO VG 150 to 460 oil by load type and ambient temperature (the catalogue's viscosity table — mineral or synthetic) and set the plugs for your mounting position A, B, C, D, VA or VB (see the mounting-positions sheet). Weight 160 kg.
How to pick from the table: the ratio sets the output speed — at 1400 r/min input, ratio 15:1 gives 93 r/min at the hollow shaft. Choose the row whose output speed and rated torque Mn2 cover your conveyor's needs (with a service factor for the load — see the Selection Guide tab), check that your motor's power does not exceed Pn1 and that the belt or chain pull on the input shaft stays within Rn1. Running a 6-pole or 8-pole motor? Press the 900 or 500 r/min toggle for those figures. Other ratios on request.
Product Configuration
Select a row to add it to your quote
Figures for a 1400 r/min input (4-pole motor); the 900 and 500 r/min input figures are behind the toggles above the table.
| Code | Ratio | Output speed | Rated torque Mn2 | Input power Pn1 | Input radial load Rn1 | Output speed (900 r/min in) | Rated torque Mn2 (900) | Input power Pn1 (900) | Input radial load Rn1 (900) | Output speed (500 r/min in) | Rated torque Mn2 (500) | Input power Pn1 (500) | Input radial load Rn1 (500) | Weight |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CHA 80/2/80 R.15 |
15:1
|
93 r/min
|
5795 Nm
|
59.9 kW
|
4200 N
|
60 r/min
|
5985 Nm
|
39.9 kW
|
4700 N
|
33 r/min
|
6600 Nm
|
22.8 kW
|
5900 N
|
160.0 kg
|
CHA 80/2/80 R.20 |
20:1
|
69 r/min
|
6405 Nm
|
48.3 kW
|
4200 N
|
44 r/min
|
6615 Nm
|
32.6 kW
|
4700 N
|
24.5 r/min
|
6930 Nm
|
18.8 kW
|
5900 N
|
160.0 kg
|
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Product Information
Reading the table
The catalogue rates each ratio at three input speeds. The main columns are for a 1400 r/min input (a 4-pole motor): the output speed, the rated output torque Mn2, the input power Pn1 the unit accepts and the radial load Rn1 the input shaft can carry. Press "Show 900 r/min input figures" or "Show 500 r/min input figures" for 6-pole and 8-pole drives. Other ratios are available on request.
Service factor
Mn2 is the rated torque for a uniform load. Pick the unit so that Mn2 covers your required torque times the service factor for your load type and running hours — the catalogue's load-type table (p124) gives the factor, from uniform duty (light conveyors, centrifugal pumps) up to heavy, shock-loaded duty. Ask us if you'd like us to size it with you.
Radial load on the input shaft
A pulley or sprocket on the input shaft loads it radially: FR = 2000 · T · f / D, with T the torque in Nm, D the pulley or sprocket diameter in mm and f the transmission factor — 1.15 for a gear, 1.4 for a chain sprocket, 1.75 for a V-belt pulley, 2.5 for a flat-belt pulley. FR must stay within Rn1 for the ratio and input speed you run.
Backstop
All sizes except CHA 30 can be supplied with a backstop device so the drive cannot run back on an inclined conveyor. It is fitted to order — state the free direction of rotation when ordering.
- Material
- GG20 cast iron housing, ground 21NiCrMo2 gears
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