Bevel gearboxes and flanged bevel gearboxes for indicators

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Gearboxes - General information

● Universally applied, suitable for all industrial applications where it is necessary to transmit rotary motions between two shafts at right angles.

● Compact and modular design, highly adaptable, easy installation.

● Manual or motorized motion, flanges available for coupling to machines, motors, display units.

● Wide range of input and output shafts with keyways.

● Special versions available upon request.

Gearboxes models ‹66› for intermittent use

● 5 sizes identified as 66/22 - 66/4 - 66/5 - 66/6 - 66/8.

● 5 configurations identified as «A»- «B» - «C» - «D» - «E», with protruding output shafts identified as M, blind and through females as F.

● Standard shaft diameters from Ø 6 to Ø 20 mm.

● Models with straight bevel gears, suitable for moderate loads and speeds

● Models with spiral bevel gears for higher precision, silent operation, and higher output torque.

● Flanges for mounting on the machine side and for motors.

● Mounting flanges and shaft extensions for adjustments displayed with mechanical and electronic position indicators.

Gearboxes models ‹66_UC› for continuous use

● 3 sizes identified as 66/4UC - 66/5UC - 66/6UC.

● 4 configurations identified as «A» - «B» - «C» - «D», with protruding output shafts identified as M, blind and through females as F.

● Standard shaft diametersfrom Ø 8 to Ø 20 mm.

Photogallery

APPLICATION EXAMPLES

GENERAL DATA
Casing material:
grey anodized aluminum for 66/4 - /5 - /6 - /8; black anodized aluminum for 66/22,RINV-OP; AISI 303stainless steel (on request)
Shaft material:
AISI 303 stainless steel
Gear material:
steel with wear-resistant surface hardening treatment
Gear play tolerances:
from 0.1 ° to 0.75 ° (smaller tollerances on request^①); minimum backlash and axial play
Bearings:
ball-bearing of the best brands suitably sized to ensure long life
Lubrication ^②:
long life grease; on request available H1 grease for food/pharmaceutical industry, and for high temperatures
Transmission ratios ^③:
1:1 - 1:2 reduction, 2:1 multiplication; the total efficiency of the transmission is 90%
Working temperature:
-10° + 50°
Available torques:
from 2 Nm to 80 Nm
^① Excessive play reduction, could cause blockage of the transmission; the play tends to grow with the gear wear ^② no maintenance; periodically it is necessary to verify the absence of leaks from the unit ^③ 1/2 and 2/1 ratios are only available with spiral gears

LIFETIME CALCULATION
Theoretic Expected Life ▪ = 10.000h x fu (factor of use) Suggested torque (Nm) fu = -------------------- Applied torque (Nm) ▪▪
▪ The lifetime of 10.000h considers the following conditions: - Applied torque = recommended torque (see tables) - Maximum of 8 working hours per day - Working temperature +20 °C - No shocks ▪▪ Output torque actually applied Max torque applied (see tables/models)

NECESSARY DATA FOR THE SELECTION OF THE GEARBOX

● Transmissible Torque (Nm) - the rotational force that can be transmitted without causing damage or reducing performance

● Rotational Speed (rpm) - the number of complete rotations made per minute

● Gear Ratio - the ratio between input and output speed.

● Mounting Configuration - orientation, type (solid or hollow) and diameter of the shaft

● Weight and Size - space and weight limitations that the angular gearbox must adhere to

● Operation - intermittent or continuous use

● Radial and Axial Loads - forces that act perpendicular (radial) or along the axis of rotation (axial)

● Backlash and Precision - mechanical precision requirements and the permissible backlash in the system

● Nominal Power - the power that the angular gearbox must be able to handle, expressed in kW

● Working conditions - environmental conditions such as temperature, humidity, presence of dust or chemicals

GLOSSARY

AL	=	slow shaft
AV	=	fast shaft
dc	=	bevel gears
dsp	=	spiral gears
F	=	blind hollow shaft / female
F	=	through hollow shaft / female
Fa	=	axial force
Fr	=	radial force
fu	=	use coefficient
i	=	transmission ratio
M	=	protruding / male shaft
N	=	Newton
Nm	=	Newton meter
Pn	=	power
R	=	efficiency
rpm	=	revolutions per minute (1/min)
T	=	torque
Ta	=	applied torque
Ti	=	input torque
Tm	=	maximum torque
To	=	output torque
Tr	=	recommended torque

- To identify the most suitable gearbox for your requirements, refer to the values in the tables. If the real loads and efficiency are very close to the table values, contact the technical department.

- All tables show linear measurements expressed in <mm>, unless otherwise specified. All the reduction ratios are expressed as a <fraction> unless otherwise specified. All forces, efficiency and the loads are expressed in <N or Nm> (10 N ≌ 1 kg or 10Nm ≌ 1Kgm ) unless otherwise specified.

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CONFIGURATIONS AND DIRECTION OF ROTATION

⟪A⟫	⟪B⟫	⟪C⟫

⟪D⟫	⟪E⟫

The direction of rotation depends from the configuration and from the positioning; see "Versions with dimension drawings" for each model.

REPRESENTATION OF BEVEL GEARS
Straight bevel gears		Spiral bevel gears

Suitable for moderate loads and speeds		Suitable for loads up to 30% higher and high speeds

REPRESENTATION OF TRANSMISSION RATIOS

2 shafts

3 shafts

The ratio is determined by the shaft1always shown on the opposite side of the fixing bores M_.

Example:

ratio 1:2

shaft 1 = 10 rpm

shaft 2 = 5 rpm

ratio 2:1
(not available in version «D»)

shaft 1 = 5 rpm

shaft 2 = 10 rpm

REPRESENTATION OF DESIGN CONFIGURATION

The desing configuration is determined by the shaft1always shown on the opposite side of the fixing bores M_, the others shaft are defined following the clockwise direction.

REPRESENTATION OF LOADS
«B»	«D»

Fr = radial load The radial load acts in a perpendicular direction to the shaft Fa = axial loas The axial load (in pull or push) acts in the same direction of the shaft T = torque
Note: a radial load (ex. belt tension) can only be applied to the long shaft of the «B» and «D» versions; otherwise, a support must be provided.

GREASE FITTING
Gearboxes with 2 shafts	Gearboxes with 3 shafts

Grease fitting: recommended if work conditions exceed Tab. 6 parameters, to extend unit lifespan, or for difficult-to-reach positions. Lubricant must be replenished at variable intervals (consult Tech Dept). Standard position shown; alternative positions available on request.