SR Series end-of-shaft slip rings

Ten-circuit end-of-shaft slip ring with brush lifter, 50.8 mm rotor

The SR10M is an end-of-shaft slip ring with ten circuits rated at 500 mA. It mounts on the end of a rotating shaft and carries strain gages, thermocouples, accelerometers and low voltages from rotor to stator through precious metal rings and brushes, with a peak noise of 0.1 Ω. A manual brush lifter lifts the brushes off the rings while the slip ring keeps turning, reducing wear. Its stainless steel case is sealed against dust. Color-coded solder terminals sit on rotor and stator, and circular connectors are optional. With a 50.8 mm (2 in) rotor, it is 42.7 mm (1.68 in) long to the top of the brush lifter, weighs 184 g and runs up to 12 000 rpm, from −40 to 121 °C.

On installation, the rotor flange is mounted to the end of the shaft, through an adapter if needed, with three #8-32 screws 120° apart on a 43.2 mm (1.700 in) bolt circle. Sensor wires run along the shaft, or through a hollow shaft and a slot machined in it or in the adapter, to the rotor terminals. The bearings are lubricated for life; below −18 °C (0 °F), a low-temperature lubricant is specified.

It is used, for example, for thermocouples on crankshaft bearings on an engine dynamometer or on an air conditioning compressor; its rotor pilots onto AMP-TC modules that amplify the thermocouples on the rotating side.

Twenty-circuit end-of-shaft slip ring, 50.8 mm rotor

The SR20M is an end-of-shaft slip ring with twenty circuits rated at 500 mA. It mounts on the end of a rotating shaft and carries strain gages, thermocouples, accelerometers and low voltages from rotor to stator through precious metal rings and brushes, with a peak noise of 0.1 Ω. Its stainless steel case is sealed against dust. Color-coded solder terminals sit on rotor and stator, and circular connectors are optional. With a 50.8 mm (2 in) rotor, it is 56.6 mm (2.23 in) long, weighs 204 g and runs up to 4 000 rpm, from −40 to 121 °C.

On installation, the rotor flange is mounted to the end of the shaft, through an adapter if needed, with three #8-32 screws 120° apart on a 43.2 mm (1.700 in) bolt circle. Sensor wires run along the shaft, or through a hollow shaft and a slot machined in it or in the adapter, to the rotor terminals. The bearings are lubricated for life; below −18 °C (0 °F), a low-temperature lubricant is specified.

It is used, for example, for thermocouples on crankshaft bearings on an engine dynamometer or on an air conditioning compressor; its rotor pilots onto AMP-TC modules that amplify the thermocouples on the rotating side.

36-circuit end-of-shaft slip ring, 50.8 mm rotor

The SR36M is an end-of-shaft slip ring with 36 circuits rated at 250 mA. It mounts on the end of a rotating shaft and carries strain gages, thermocouples, accelerometers and low voltages from rotor to stator through precious metal rings and brushes, with a peak noise of 0.1 Ω. Its stainless steel case is sealed against dust. Color-coded solder terminals sit on rotor and stator, and circular connectors are optional. With a 50.8 mm (2 in) rotor, it is 89.2 mm (3.51 in) long, weighs 255 g and runs up to 2 400 rpm, from −40 to 121 °C.

On installation, the rotor flange is mounted to the end of the shaft, through an adapter if needed, with three #8-32 screws 120° apart on a 43.2 mm (1.700 in) bolt circle. Sensor wires run along the shaft, or through a hollow shaft and a slot machined in it or in the adapter, to the rotor terminals. The bearings are lubricated for life; below −18 °C (0 °F), a low-temperature lubricant is specified.

In a validation test, an SR36M spinning at 900 rpm carried a Gigabit Ethernet link, a file passing at 111 MB/s with no error; it is also used for thermocouples on crankshaft bearings on an engine dynamometer or on an air conditioning compressor.

Ten, twenty or thirty-six circuits

The SR Series slip ring mounts on the end of a rotating shaft and carries strain gages, thermocouples, accelerometers and low voltages from rotating equipment. It has 10, 20 or 36 circuits, rated at 500 mA (250 mA on the SR36), and a rotor of 50.8 mm (M), 63.5 mm (A), 73.7 mm (G) or 76.2 mm (Y).

The SR10M runs up to 12 000 rpm, the SR20M up to 4 000 rpm and the SR36M up to 2 400 rpm. Weatherproof versions add contacting rotary seals (W), limited to 2 000 rpm, or non-contacting labyrinth seals (B).

The rings and brushes are precious metals, and the stainless steel case is sealed against dust. The SR10M has a manual brush lifter: when no connection is needed, the brushes are lifted off the rings while the slip ring keeps turning, reducing wear. Connections are color-coded solder terminals on rotor and stator, with circular connectors as an option, and the bearings are permanently lubricated.

Weatherproof ten-circuit end-of-shaft slip ring, 50.8 mm rotor, contacting seals

The SR10MW is an end-of-shaft slip ring with ten circuits rated at 500 mA. It mounts on the end of a rotating shaft and carries strain gages, thermocouples, accelerometers and low voltages from rotor to stator through precious metal rings and brushes, with a peak noise of 0.1 Ω. Contacting rotary seals (W) are added to its dust-sealed stainless steel case. Color-coded solder terminals sit on rotor and stator, and circular connectors are optional. Its rotor is 50.8 mm (2 in) in diameter; it runs up to 2 000 rpm, against 12 000 rpm without these seals, from −40 to 121 °C.

On installation, the rotor flange is mounted to the end of the shaft, through an adapter if needed, with three #8-32 screws 120° apart on a 43.2 mm (1.700 in) bolt circle. Sensor wires run along the shaft, or through a hollow shaft and a slot machined in it or in the adapter, to the rotor terminals. The bearings are lubricated for life; below −18 °C (0 °F), a low-temperature lubricant is specified. For a weatherproof stator connection, the optional circular connector is sealed at the rear of the plug with RTV silicone or a sealing backshell.

It is used, for example, for thermocouples on crankshaft bearings on an engine dynamometer or on an air conditioning compressor.

Weatherproof twenty-circuit end-of-shaft slip ring, 50.8 mm rotor, contacting seals

The SR20MW is an end-of-shaft slip ring with twenty circuits rated at 500 mA. It mounts on the end of a rotating shaft and carries strain gages, thermocouples, accelerometers and low voltages from rotor to stator through precious metal rings and brushes, with a peak noise of 0.1 Ω. Contacting rotary seals (W) are added to its dust-sealed stainless steel case. Color-coded solder terminals sit on rotor and stator, and circular connectors are optional. Its rotor is 50.8 mm (2 in) in diameter; it runs up to 2 000 rpm, against 4 000 rpm without these seals, from −40 to 121 °C.

On installation, the rotor flange is mounted to the end of the shaft, through an adapter if needed, with three #8-32 screws 120° apart on a 43.2 mm (1.700 in) bolt circle. Sensor wires run along the shaft, or through a hollow shaft and a slot machined in it or in the adapter, to the rotor terminals. The bearings are lubricated for life; below −18 °C (0 °F), a low-temperature lubricant is specified. For a weatherproof stator connection, the optional circular connector is sealed at the rear of the plug with RTV silicone or a sealing backshell.

It is used, for example, for thermocouples on crankshaft bearings on an engine dynamometer or on an air conditioning compressor.

Weatherproof ten-circuit end-of-shaft slip ring, 63.5 mm rotor, contacting seals

The SR10AW is an end-of-shaft slip ring with ten circuits rated at 500 mA. It mounts on the end of a rotating shaft and carries strain gages, thermocouples, accelerometers and low voltages from rotor to stator through precious metal rings and brushes, with a peak noise of 0.1 Ω. Contacting rotary seals (W) are added to its dust-sealed stainless steel case. Color-coded solder terminals sit on rotor and stator, and circular connectors are optional. Its rotor (code A) is 63.5 mm (2.5 in) in diameter, against 50.8 mm on the SR10M; it runs up to 2 000 rpm, against 12 000 rpm without these seals, from −40 to 121 °C.

On installation, the 63.5 mm rotor flange is mounted to the end of the shaft, through an adapter if needed. Sensor wires run along the shaft, or through a hollow shaft and a slot machined in it or in the adapter, to the rotor terminals. The bearings are lubricated for life; below −18 °C (0 °F), a low-temperature lubricant is specified. For a weatherproof stator connection, the optional circular connector is sealed at the rear of the plug with RTV silicone or a sealing backshell.

As an SR10AW/T512/AX2, with a tachometer circuit and connectors on rotor and stator, it is the slip ring of the 6 in Wheel Instrumentation Package WIP6-SG-TC2K.

Weatherproof twenty-circuit end-of-shaft slip ring, 63.5 mm rotor, contacting seals

The SR20AW is an end-of-shaft slip ring with twenty circuits rated at 500 mA. It mounts on the end of a rotating shaft and carries strain gages, thermocouples, accelerometers and low voltages from rotor to stator through precious metal rings and brushes, with a peak noise of 0.1 Ω. Contacting rotary seals (W) are added to its dust-sealed stainless steel case. Color-coded solder terminals sit on rotor and stator, and circular connectors are optional. Its rotor (code A) is 63.5 mm (2.5 in) in diameter, against 50.8 mm on the SR20M; it runs up to 2 000 rpm, against 4 000 rpm without these seals, from −40 to 121 °C.

On installation, the 63.5 mm rotor flange is mounted to the end of the shaft, through an adapter if needed. Sensor wires run along the shaft, or through a hollow shaft and a slot machined in it or in the adapter, to the rotor terminals. The bearings are lubricated for life; below −18 °C (0 °F), a low-temperature lubricant is specified. For a weatherproof stator connection, the optional circular connector is sealed at the rear of the plug with RTV silicone or a sealing backshell.

It is used, for example, for thermocouples on crankshaft bearings on an engine dynamometer or on an air conditioning compressor.

Four-circuit end-of-shaft slip ring with 60 ppr encoder, 50.8 mm rotor

The SR4M/E60 is an end-of-shaft slip ring with four circuits rated at 500 mA and a 60 pulse-per-revolution encoder. It mounts on the end of a rotating shaft and carries strain gages, thermocouples, accelerometers and low voltages from rotor to stator, while the encoder measures rotational speed. Its rings and brushes are precious metal, and its terminals color-coded. The housing is sealed against dust, and a manual brush lifter lifts the brushes off the rings when no signal is needed. With a 50.8 mm (2 in) rotor, it is 57.9 mm long, weighs 213 g and runs up to 6 000 rpm, from −40 to 100 °C.

On installation, the rotor flange is screwed to the end of the shaft with three 8-32 screws on a 43.18 mm (1.700 in) circle. The encoder is powered with 5 to 15 V DC. The bearings are lubricated for life, and a low-temperature lubricant is specified below −18 °C. A rubber boot or a metal cap adds a cable or connector to the stator terminals, and a circular connector can replace the rotor terminals.

It is used where a slip ring and a speed encoder are both needed on the end of a shaft; with Michigan Scientific frequency-to-voltage encoder electronics, its pulses also give an analog speed signal for recorders that cannot read a pulse train.

Six-circuit end-of-shaft slip ring with 60 ppr encoder, 50.8 mm rotor

The SR6M/E60 is an end-of-shaft slip ring with six circuits rated at 500 mA and a 60 pulse-per-revolution encoder. It mounts on the end of a rotating shaft and carries strain gages, thermocouples, accelerometers and low voltages from rotor to stator, while the encoder measures rotational speed. Its rings and brushes are precious metal, and its terminals color-coded. The housing is sealed against dust, and a manual brush lifter lifts the brushes off the rings when no signal is needed. With a 50.8 mm (2 in) rotor, it is 57.9 mm long, weighs 213 g and runs up to 6 000 rpm, from −40 to 100 °C.

On installation, the rotor flange is screwed to the end of the shaft with three 8-32 screws on a 43.18 mm (1.700 in) circle. The encoder is powered with 5 to 15 V DC. The bearings are lubricated for life, and a low-temperature lubricant is specified below −18 °C. A rubber boot or a metal cap adds a cable or connector to the stator terminals, and a circular connector can replace the rotor terminals.

It is used where a slip ring and a speed encoder are both needed on the end of a shaft; with Michigan Scientific frequency-to-voltage encoder electronics, its pulses also give an analog speed signal for recorders that cannot read a pulse train.

Eight-circuit end-of-shaft slip ring with 60 ppr encoder, 50.8 mm rotor

The SR8M/E60 is an end-of-shaft slip ring with eight circuits rated at 500 mA and a 60 pulse-per-revolution encoder. It mounts on the end of a rotating shaft and carries strain gages, thermocouples, accelerometers and low voltages from rotor to stator, while the encoder measures rotational speed. Its rings and brushes are precious metal, and its terminals color-coded. The housing is sealed against dust, and a manual brush lifter lifts the brushes off the rings when no signal is needed. With a 50.8 mm (2 in) rotor, it is 57.9 mm long, weighs 213 g and runs up to 6 000 rpm, from −40 to 100 °C.

On installation, the rotor flange is screwed to the end of the shaft with three 8-32 screws on a 43.18 mm (1.700 in) circle. The encoder is powered with 5 to 15 V DC. The bearings are lubricated for life, and a low-temperature lubricant is specified below −18 °C. A rubber boot or a metal cap adds a cable or connector to the stator terminals, and a circular connector can replace the rotor terminals.

It is used where a slip ring and a speed encoder are both needed on the end of a shaft; with Michigan Scientific frequency-to-voltage encoder electronics, its pulses also give an analog speed signal for recorders that cannot read a pulse train.

Ten-circuit end-of-shaft slip ring with 60 ppr encoder, 50.8 mm rotor

The SR10M/E60 is an end-of-shaft slip ring with ten circuits rated at 500 mA and a 60 pulse-per-revolution encoder. It mounts on the end of a rotating shaft and carries strain gages, thermocouples, accelerometers and low voltages from rotor to stator, while the encoder measures rotational speed. Its rings and brushes are precious metal, and its terminals color-coded. The housing is sealed against dust, and a manual brush lifter lifts the brushes off the rings when no signal is needed. With a 50.8 mm (2 in) rotor, it is 57.9 mm long, weighs 213 g and runs up to 6 000 rpm, from −40 to 100 °C.

On installation, the rotor flange is screwed to the end of the shaft with three 8-32 screws on a 43.18 mm (1.700 in) circle. The encoder is powered with 5 to 15 V DC. The bearings are lubricated for life, and a low-temperature lubricant is specified below −18 °C. A rubber boot or a metal cap adds a cable or connector to the stator terminals, and a circular connector can replace the rotor terminals.

It is used where a slip ring and a speed encoder are both needed on the end of a shaft; with Michigan Scientific frequency-to-voltage encoder electronics, its pulses also give an analog speed signal for recorders that cannot read a pulse train.

Weatherproof four-circuit end-of-shaft slip ring with 60 ppr encoder, 50.8 mm rotor

The SR4MW/E60 is an end-of-shaft slip ring with four circuits rated at 500 mA and a 60 pulse-per-revolution encoder. It mounts on the end of a rotating shaft and carries strain gages, thermocouples, accelerometers and low voltages from rotor to stator, while the encoder measures rotational speed. Its rings and brushes are precious metal, and its terminals color-coded. Contacting rotary seals make it weatherproof against water and dust and limit it to 2 000 rpm. With a 50.8 mm (2 in) rotor, it weighs 213 g and works from −40 to 100 °C.

On installation, the rotor flange is screwed to the end of the shaft with three 8-32 screws on a 43.18 mm (1.700 in) circle. The encoder is powered with 5 to 15 V DC. The bearings are lubricated for life, and a low-temperature lubricant is specified below −18 °C. A rubber boot or a metal cap adds a cable or connector to the stator terminals, and a circular connector can replace the rotor terminals.