Lowest torsional backlash – Highest loads

These gearboxes feature very low backlash and high torsional rigidity. They are especially well suited for use in handling systems that run with high speeds and acceleration values and applications in which the optionally available backlash of <1 arcminute is of particular significance.

The honed gearing of this series ensures the lowest level of operating noise and reduces vibration. The use of special bearings enables high radial and axial forces. These gearboxes are the right choice for both S1 and S5 operation. The series also features IP65 protection, flexible mounting orientation and maintenance-free operation through permanent lubrication. The premium series gearboxes are available as angular planetary gearboxes, planetary gearboxes with output flange and coaxial planetary gearboxes.

Planetary gearboxes with output shaft 8GP
Planetary gearboxes with output flange 8GF
Angular planetary gearboxes 8GA
Accessories 8GA75

Documentation

One-of-a-kind building block principle for planetary gearboxes

The standard gearboxes are single-stage for gear ratios i= 3, 4, 5, 7, 8 and 10 and have ≤8 - ≤15 arcmin backlash. In addition, these gearboxes are also offered in two-stage or three-stage designs. At the top of the product line, the premium series provides backlash ≤ 1 arcmin as an option paired with high output torques. B&R gearboxes from the standard series give you the possibility to choose between all output geometries established on the market in the area of coaxial planetary gearboxes.

  • This enables B&R to supply gearboxes for existing applications without having to make changes to the machine.

The standard gearboxes are single-stage for gear ratios i= 3, 4, 5, 7, 8 and 10 and have ≤8 - ≤15 arcmin backlash. In addition, these gearboxes are also offered in two-stage or three-stage designs. At the top of the product line, the premium series provides backlash ≤ 1 arcmin as an option paired with high output torques. B&R gearboxes from the standard series give you the possibility to choose between all output geometries established on the market in the area of coaxial planetary gearboxes.

  • This enables B&R to supply gearboxes for existing applications without having to make changes to the machine.

Additional information

8G - Order key

Downloads

System overview 8G

Online tools

CAD configurator For motors and gearboxes. Our CAD application allows you to access 2D/3D CAD data in various formats.

Premium planetary gearboxes – 3 types

8GP60

Planetary gearboxes
With output shaft
Series 60

8GP70

Planetary gearboxes
With output shaft
Series 70

8GP60

8GP70

Class

Premium

Size

070, 090, 115, 142, 190

Toothing type

Straight

Helical

Protection

IP65

Backlash [arcmin]:

1-stage

2-stage

3-stage

≤1 - ≤3

≤1 - ≤5

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Gear ratio:

1-stage

2-stage

3-stage

3 - 10

12 - 100

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Nominal output torque [Nm]

27 - 1800

Radial load 20,000 h [N] Refers to the center of the output shaft. Values refer to drive shaft speed n2 = 100 min-1 and application factor KA = 1 as well as S1 operation for electrical machines and T = 30°C. Depends on the diameter of the respective motor shaft.

3200 - 21000

Axial load 20,000 h [N] Refers to the center of the output shaft. Values refer to drive shaft speed n2 = 100 min-1 and application factor KA = 1 as well as S1 operation for electrical machines and T = 30°C. Depends on the diameter of the respective motor shaft.

4400 - 21000

Smooth shaft

Keyed shaft

Toothed shaft

Standard

Optionally available

Optionally available

8GF60

Planetary gearboxes with output flange
Series 60

8GF70

Planetary gearboxes with output flange
Series 70

8GF60

8GF70

Class

Premium

Size

064, 090, 110, 140, 200

Toothing type

Straight

Helical

Protection

IP65

Backlash [arcmin]:

1-stage

2-stage

3-stage

≤1 - ≤3

≤1 - ≤5

---

Gear ratio:

1-stage

2-stage

3-stage

4 - 10

16 - 100

---

Nominal output torque [Nm]

27 - 1800

Radial load 20,000 h [N]Refers to the center of the output shaft. Values refer to drive shaft speed n2 = 100 min-1 and application factor KA = 1 as well as S1 operation for electrical machines and T = 30°C. Depends on the diameter of the respective motor shaft.

2400 - 33000

Axial load 20,000 h [N]Refers to the center of the output shaft. Values refer to drive shaft speed n2 = 100 min-1 and application factor KA = 1 as well as S1 operation for electrical machines and T = 30°C. Depends on the diameter of the respective motor shaft.

4300 - 25000

Drive flange

Standard

8GA60

Angular planetary gearbox with output shaft
Series 60

8GA75

Angular planetary gearbox with hollow shaft
Series 75

8GA60

8GA75

Class

Premium

Size

070, 090, 115, 142

Toothing type

Spiral bevel

Protection

IP65

Backlash [arcmin]:

1-stage

2-stage

3-stage

≤5

≤7

---

≤5

---

---

Gear ratio:

1-stage

2-stage

3-stage

4 - 10

16 - 100

---

4 - 10

---

---

Nominal output torque [Nm]

22 - 800

Radial load 20,000 h [N] Refers to the center of the output shaft. Values refer to drive shaft speed n2 = 100 min-1 and application factor KA = 1 as well as S1 operation for electrical machines and T = 30°C. Depends on the diameter of the respective motor shaft.

3200 - 11400

Axial load 20,000 h [N] Refers to the center of the output shaft. Values refer to drive shaft speed n2 = 100 min-1 and application factor KA = 1 as well as S1 operation for electrical machines and T = 30°C. Depends on the diameter of the respective motor shaft.

4300 - 15000

Smooth shaft

Keyed shaft

Hollow shaft (one side)

Hollow shaft (both sides)

Standard

Optionally available

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Standard

Optionally available

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