LRA linear-rotary actuators
A linear rotary actuator combines a Z (or horizontal) linear axis with a theta rotary stage on the carriage, so one part number does the lift-and-turn, pick-orient-place, cap-and-uncap, or screw-driving motion that would otherwise take two actuators and a bracket. The LYNX LRA is an LSA 45 or BSA 45 linear axis carrying a NEMA 23 rotary table, shipped as a kit with the mounting hardware.
Twelve configurations are stock. The linear axis is a lead screw (6.35 mm lead for 150 mm/s and 7 kg, or 12.7 mm for 300 mm/s and 5 kg) or a ball screw (5 mm or 10 mm lead) at 50, 100, or 250 mm of travel; the rotary table is the same N23 unit sold on its own at $495. Repeatability is ±0.025 mm linear. Pricing runs from $1,245 for the 50 mm lead-screw kit to $1,745 for the 250 mm ball-screw kit, and every kit has a quote part number in the 200227 series.
Where an LRA fits
Three applications account for most LRA orders: capping and decapping tubes in lab automation (the rotary spins the cap while the linear axis follows the thread), orienting parts before placement on a pick-and-place gantry, and small-torque fastening or dispensing where the tool must rotate while advancing. On a gantry the LRA mounts where the Z actuator would go, so the engine treats it as a Z axis with a rotary degree of freedom and sizes the linear part exactly as it would an LSA or BSA.
Choosing between the lead-screw and ball-screw version
Lead screw for cost and self-locking hold; ball screw for continuous duty, thrust, and repeatability. The rotary stage is identical. See the BSA family page for the full comparison.
All 12 LRA linear-rotary actuators
| Part | Travel (mm) | Rated load (kg) | Max speed (mm/s) | Motor | List |
|---|---|---|---|---|---|
| LRA45 Lead Screw 6.35mm Lead 50mm Linear-Rotary | 50 | 7 | 150 | Stepper | $1,245 |
| LRA45 Lead Screw 12.7mm Lead 50mm Linear-Rotary | 50 | 5 | 300 | Stepper | $1,245 |
| LRA45 Ball Screw 5mm Lead 50mm Linear-Rotary | 50 | 7 | 100 | Stepper | $1,520 |
| LRA45 Ball Screw 10mm Lead 50mm Linear-Rotary | 50 | 5 | 200 | Stepper | $1,520 |
| LRA45 Lead Screw 6.35mm Lead 100mm Linear-Rotary | 100 | 7 | 150 | Stepper | $1,370 |
| LRA45 Lead Screw 12.7mm Lead 100mm Linear-Rotary | 100 | 5 | 300 | Stepper | $1,370 |
| LRA45 Ball Screw 5mm Lead 100mm Linear-Rotary | 100 | 7 | 100 | Stepper | $1,620 |
| LRA45 Ball Screw 10mm Lead 100mm Linear-Rotary | 100 | 5 | 200 | Stepper | $1,620 |
| LRA45 Lead Screw 6.35mm Lead 250mm Linear-Rotary | 250 | 7 | 150 | Stepper | $1,520 |
| LRA45 Lead Screw 12.7mm Lead 250mm Linear-Rotary | 250 | 5 | 300 | Stepper | $1,520 |
| LRA45 Ball Screw 5mm Lead 250mm Linear-Rotary | 250 | 7 | 100 | Stepper | $1,745 |
| LRA45 Ball Screw 10mm Lead 250mm Linear-Rotary | 250 | 5 | 200 | Stepper | $1,745 |
Rated load and speed are catalog maximums for the configuration shown; "—" means the figure depends on the motor curve at your speed — the engine computes it. All prices are U.S. list, single quantity.
Not sure which one?
Describe the task — payload, travel, speed, orientation. The engine picks the family and the variant, shows the torque and inertia math, and prices the whole system.
Frequently asked
What is a linear rotary actuator?
A single actuator that provides linear travel and rotation about the same axis — a Z-theta stage. The LYNX LRA does it with a lead-screw or ball-screw linear axis and a stepper-driven rotary table on the carriage.
What is the rotary resolution?
The rotary table is a NEMA 23 stepper stage; resolution is set by the controller's microstepping (1.8° full step, 0.1125° at 16× microstepping). Absolute-encoder feedback is a quoted option.
Can the LRA mount on a gantry?
Yes. It takes the place of the Z actuator on an XYZ or XX'YZ gantry; the engine sizes the X and Y axes for its mass automatically.
How are the two motors controlled?
As two axes on a BLC series controller — a 4-axis BLC-4T runs an XY gantry plus both LRA motors; the kit ships with cabling specified for it.