8WS | b | c | d | . | ee | iii | jj | n | o | p | v | |||||||||||||||||
Cooling / Construction type | ||||||||||||||||||||||||||||
Size | ||||||||||||||||||||||||||||
Length | ||||||||||||||||||||||||||||
Motor encoder system | ||||||||||||||||||||||||||||
Gear ratio | ||||||||||||||||||||||||||||
Motor options (protection class / shaft end) | ||||||||||||||||||||||||||||
Nominal speed | ||||||||||||||||||||||||||||
Connection type | ||||||||||||||||||||||||||||
Cable length | ||||||||||||||||||||||||||||
Motor version | ||||||||||||||||||||||||||||
Order keys only provide information about possible combinations in exceptional cases. Information about possible combinations is available in the CAD configurator (cad.br-automation.com).
Cooling / Construction type (b)
Cooling / Construction type (b)
8WS | B | c | d | . | ee | iii | jj | n | o | p | v |
8WS servo motors with cooling type / size B are based on motors with cooling type A. The motors must be installed with the mounting flange (cooling surface). They are directly mounted to the gearbox with seamlessly welded housings.
Valid code: B
Size (c)
Size (c)
8WS | B | c | d | . | ee | iii | jj | n | o | p | v |
8WS servo motors are available in various sizes (1, 2, 3, 4). These differ in dimensions (especially flange dimensions) and power data. The different sizes are distinguished by a character (c) in the order number. The larger this number, the larger the flange dimensions and power data of the respective motor.
Available sizes (c) | ||||
|---|---|---|---|---|
1 (ø 17 mm) | 2 (ø 22 mm) | 3 (ø 32 mm) | 4 (ø 40 mm) | |
8WSB | Yes | Yes | Yes | Yes |
Length (d)
Length (d)
8WS | B | c | d | . | ee | iii | jj | n | o | p | v |
The available lengths have different performance data and are distinguished by a digit (d) in the order number.
Available lengths (d) | |||
|---|---|---|---|
1 (Length 10) | 2 (Length 20) | 3 (Length 30) | |
8WSB1 | Yes | --- | --- |
8WSB2 | Yes | --- | --- |
8WSB3 | --- | Yes | --- |
8WSB4 | --- | --- | Yes |
Motor encoder systems (ee)
Motor encoder systems (ee)
8WS | B | c | d | . | ee | iii | jj | n | o | p | v |
The encoder system is listed as part of the model number in the form of a 2-digit code (ee).
The order code (ee) for the SSI encoder (single-turn) is F0.
Order code (ee) | |
|---|---|
F0 (SSI encoder, single-turn) | |
Supply voltage | 5 V ±10% |
Current consumption | 60 mA effective |
Number of outputs | 3 SSI serial / CLK / Data differential, max. 60 mA |
Absolute value generation | Digital absolute position information within one rotor revolution |
Resolution | 4096 positions per revolution (12-bit) |
Precision | ±1° (up to ±0.4° possible on request) |
Maximal speed | 30,000 rpm |
Temperature of workspace | -40°C to 125°C |
Gear ratios (iii)
Gear ratios (iii)
8WS | B | c | d | . | ee | iii | jj | n | o | p | v |
The code (iii) in the order number contains the gear ratio.
Available gear ratios (gear stages) | |||||||
|---|---|---|---|---|---|---|---|
i = 4 (1) | i = 12.25 (2) | i = 16 (2) | i = 21 (2) | i = 49 (3) | i = 50 (2) | i = 64 (3) | |
Order code (iii) | |||||||
004 | 012 | 016 | 021 | 049 | 050 | 064 | |
8WSB11 | Yes | --- | --- | Yes | --- | --- | Yes |
8WSB21 | Yes | --- | Yes | --- | --- | --- | Yes |
8WSB32 | Yes | --- | Yes | --- | --- | --- | Yes |
8WSB43 | Yes | Yes | --- | --- | Yes | --- | --- |
8WSB43 (hygienic design) | Yes | --- | Yes | --- | --- | Yes | --- |
Motor options (jj)
Motor options (jj)
8WS | B | c | d | . | ee | iii | jj | n | o | p | v |
The available motor options are summarized in the following table; they are distinguished by a code (jj) in the order number.
Protection class | Shaft end | |||
|---|---|---|---|---|
IP54 | IP66/67 | IP69K | ||
Order code (jj) | ||||
8WSB11 | S1 | S3 | --- | Flat-sided |
8WSB21 | S1 | S3 | --- | Flat-sided |
8WSB32 | S0 | S2 | --- | Smooth |
8WSB43 | S1 | S3 | S5 | With key |
 | ||||||
Shaft end per table (figure: 8WSB21, flat-sided shaft) | Shaft end per table (figure: 8WSB32, smooth shaft) | Shaft end per table (figure: 8WSB43, keyed shaft) | ||||
Nominal speed (n)
Nominal speed (n)
8WS | B | c | d | . | ee | iii | jj | n | o | p | v |
The nominal speed is specified as part of the order number in the form of a one-digit code (n).
Available nominal speeds nN [rpm] at 60 VDC operation | ||
|---|---|---|
5,500 1) | 8,500 1) | |
Order code (n) | ||
K | Q | |
8WSB11 | --- | Yes |
8WSB21 | --- | Yes |
8WSB32 | --- | Yes |
8WSB43 | Yes | --- |
| 1) | The specified motor nominal speed is limited by the max. gearbox input speed; for the resulting max. permissible motor speed, see the technical motor data. |
Connection type (o)
Connection type (o)
8WS | B | c | d | . | ee | iii | jj | n | o | p | v |
 | 8WS servomotors have a hybrid motor cable permanently connected to the motor. The connection type is defined with a letter in the order code (o). Valid code: K |
Cable length (p)
Cable length (p)
8WS | B | c | d | . | ee | iii | jj | n | o | p | v |
The code (p) in the order number provides information about the cable length. The available cable lengths are summarized in the following table.
Available cable lengths | ||||||
|---|---|---|---|---|---|---|
0.3 m | 0.5 m | 1.0 m | 2.0 m | 3.0 m | 5.0 m | |
Order code (p) | ||||||
A | B | C | D | E | F | |
8WSB11 | --- | Yes | --- | --- | Yes | --- |
8WSB21 | --- | Yes | --- | --- | Yes | --- |
8WSB32 | --- | Yes | --- | --- | Yes | --- |
8WSB43 | --- | Yes | --- | --- | Yes | --- |
 |
Motor version (v)
Motor version (v)
8WS | B | c | d | . | ee | iii | jj | n | o | p | v |
The motor version is specified as a code (v) in the model number. Motor version 0 is currently valid.
Example order 1
Example order 1
8WS | B | c | d | . | ee | iii | jj | n | o | p | v |
A gear motor of type 8WSB32 with a nominal speed of 8,500 rpm was selected for an application. The gearbox should have a gear ratio of i = 4. Protection class IP66/67 is required. The shaft end should be smooth, and the hybrid motor cable on the motor should be 0.5 m long.
The code (c) for the selected size (3 = ø 32 mm) is 3.
The code (d) for the selected length (2 = 20) is 2.
The code (ee) for the encoder system (SSI encoder, single-turn) is F0.
The code (ee) for the selected gear ratio (i = 4 = 004) is 004.
The code (ff) for the selected motor options (protection class IP66/67 and smooth shaft end) is S2.
The code (nnn) for the selected nominal speed (8,500 rpm) is Q.
The code (ff) for the connection type (hybrid motor cable permanently connected to the motor) is K.
The code (gg) for the selected cable length (0.5 m) is B.
The code (h) for the motor version (0) is 0.
The order number for the necessary motor is therefore 8WSB32.F0004S2QKB0.
Example order 2
Example order 2
8WS | B | c | d | . | ee | iii | jj | n | o | p | v |
A gear motor of type 8WSB43 with a nominal speed of 5,500 rpm was selected for an application. The gearbox should have a gear ratio of i = 50. A hygienic design with protection class IP69K is required. The shaft end should be keyed, and the hybrid motor cable on the motor should be 3.0 m long.
The code (c) for the selected size (4 = ø 40 mm) is 4.
The code (d) for the selected length (3 = 30) is 3.
The code (ee) for the encoder system (SSI encoder, single-turn) is F0.
The code (ee) for the selected gear ratio (i = 50) is 050.
The code (ff) for the selected motor options (protection class IP69K and keyed shaft end) is S5.
The code (nnn) for the selected nominal speed (5,500 rpm) is K.
The code (ff) for the connection type (hybrid motor cable permanently connected to the motor) is K.
The code (gg) for the selected cable length (3.0 m) is E.
The code (h) for the motor version (0) is 0.
The order number for the necessary motor is therefore 8WSB43.F0050S5KKE0.