- Three Sizes: Heavy Duty (L490), Mini (L200), & Compact (LJ750)
- Rectangular Jacks Offer Rugged, Dual Pantograph Design
- Large Array of Mounting Holes on Each Platform
1.00" Vertical Travel,
200 lbs Load Capacity
(One Included with Each Unit)
1.04" Vertical Travel,
50 lbs Load Capacity
2.26" Vertical Travel,
75 lbs Load Capacity
|Item #||Vertical Travel||Min Height||Max Height||Mounting Surface||Max Load Capacity|
|7.00" x 4.00"
(177.8 mm x 101.6 mm)
|3.00" x 4"
(76.2 mm x 101.6 mm)
Laboratory jacks provide a rugged, height adjustable platform ideal for mounting optomechanical sub-assemblies that, as a functional group, require height adjustment. In order to address a wide range of requirements, Thorlabs offers three different models, each with unique design characteristics suited for different ranges of end applications.
L490 Heavy Duty Lab Jack
The dual pantograph design of the L490 offers excellent rigidity and platform parallelism. The large 4.00" (101.6 mm) x 7.00" (177.8 mm) mounting platform supports up to 75 lbs (34 kg) with a smooth vertical adjustment range of 2.26" (57.3 mm) supported by stainless steel axles and connecting rods. Both the top and bottom plates offer a generous array of 1/4"-20 (M6) tapped holes and clearance slots for general mounting requirements.
L200 Mini Lab Jack
The L200 is designed with the same rigid dual pantograph design of our popular L490 above. The small design and array of 4-40 (M3) mounting holes makes it an ideal addition to our Mini-Series Construction products. The 3.00" (76.2 mm) x 4.00" (101.6 mm) mounting platform supports up to 50 lbs (22.7 kg) with a smooth vertical adjustment range of 1.04" (26.5 mm). Both top and bottom plates offer a wide range of mounting holes including 4-40 (M3), 8-32 (M4), and 1/4"-20 (M6) for general mounting requirements (see Support Drawing for more details).
LJ750 Compact Lab Jack
The LJ750 offers 1.00" (25.4 mm) of precision vertical adjustment in a compact, easy-to-operate design. The large actuator ring, graduated in 10 μm intervals, offers high sensitivity even when actuating its maximum load of 200 lbs (90.7 kg). The top platform offers an additional functionality with lockable, 360º continuously rotation.
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Current L200 Packaging
- Reduce Weight of Packaging
- Increase Usage of Recyclable Materials
- Improve Packing Integrity
- Decrease Shipping Costs
Thorlabs' Smart Pack Initiative is aimed at minimizing waste while providing adequate protection for our products. By eliminating any unnecessary packaging, implementing design changes, and utilizing eco-friendly materials, this initiative seeks to reduce the environmental impact of our
The updated L200(/M) packaging consists of recycled cardboard and weighs 13% less than the original packaging. This weight change results in a
more than 6.71 kg reduction in travel-based CO2 emissions per year, based on typical product sales.*
The other products on this page have also transitioned to recycled paper packaging. The new L490(/M) packaging results in a 41% reduction in
weight and more than 107.46 kg reduction in travel-based CO2 emissions per year, while the updated LJ750(/M) packaging results in a 28%
reduction in weight and more than 5.15 kg reduction in CO2 emissions per year.*
As we move through our product line, we will indicate re-engineered, eco-friendly packaging with our Smart Pack logo, which can be seen in the
image to the right.
*This product transitioned to smart packaging in 2013. Travel-based emissions reduction calculations are estimated based on the total weight reduction of packaging materials used for all of that year's product sales, traveling 1,000 miles on an airplane, to provide general understanding of
the impact of packaging material reduction. Calculations were made using the EPA’s shipping emissions values for different modes of transport.
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Displacement Per Turn for L490 Lab Jack
- Convenient, Removable Actuator Knob Included
- 2.26" (57.3 mm) Height Adjustment from 2.15" (54.7 mm) to 4.41" (112 m)
- 7.00" (177.8 mm) x 4.00" (101.6 mm) Mounting Surface
- 75 lbs (34.0 kg) Vertical Load Capacity
- 1/4"-20 (M6) Mounting Holes, 19 Places
- Top- and Bottom-Located Mounting Slots
The L490(/M) Lab Jack utilizes a dual-pantograph design which offers excellent rigidity. The adjustment mechanism uses a lead screw to close the angle between the opposing pairs of supporting struts. Stainless steel axles and connecting rods allow loads of up to 75 lbs (34 kg) to be smoothly elevated over the full range of the L490. The top and bottom plates each have an array of nineteen 1/4"-20 (M6) tapped mounting holes on 1" (25 mm) centers. Mounting slots are provided on the top and bottom plates.
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Displacement Per Turn for L200 Mini Lab Jack
Click for Details
- Compatible with Mini-Series Breadboards and Components
- 1.04" (26.5 mm) Height Adjustment from 0.84" (21.3 mm) to 1.88" (47.8 mm)
- 3.00" (76.2 mm) x 4.00" (101.6 mm) Mounting Surface
- 50 lbs (22.7 kg) Vertical Load Capacity
- Mounting Holes:
- L200: 1/4"-20 (7 Places), 8-32 (4 Places), and 4-40 (18 Places)
- L200/M: M6 (7 Places), M4 (4 Places), and M3 (18 Places)
- Steel Leadscrew with 1/8" Hex Socket Height Adjuster (1/8" Hex Wrench Included)
The L200(/M) Lab Jack offers the same highly rigid dual-pantograph design as the L490 but in a smaller package size. The adjustment mechanism provides smooth vertical motion while supporting vertical loads of up to 50 lbs. The top and bottom plates each offer a generous supply of tapped holes and counterbores, adding to mounting flexibility. A steel leadscrew with 1/8" hex socket (hex key included) is accessible from the rear of the unit actuates height adjustment.
- High Stability Lab Jack
- 1.00" (25.4 mm) Vertical Adjustment from 1.99" (50.5 mm) to 2.99" (75.9 mm)
- Ø2.64" (67.0 mm) Mounting Surface
- 200 lbs (90.7 kg) Static and Active Load Capacity
- Mounting Holes:
- LJ750: 1/4"-20 (4 Places), 8-32 (5 Places), and 6-32 (4 Places)
- LJ750/M: M6 (4 Places) and M4 (9 Places)
- Parallel to Within ±0.005" Over Entire Range
The LJ750(/M) Lab Jack is a compact vertical translation platform, 2" tall when fully collapsed, and 3" tall when fully extended. The large actuator knob is graduated in 10 µm increments allowing calibrated vertical height changes. 1/4"-20 (M6), 8-32 (M4), and 6-32 (M4) mounting holes are provided on the top platform. Additionally, the top platform can be rotated 360° and locked in place. A clamping arm (PM4, shown in the picture to the left) is supplied with the jack.
Click for Details
- Provide Clamping Force for Our Platform Mounts
- Threaded Hole on Top and Threaded Stud on Bottom of Post
- 6-32 Threads on PM3 and PM4
- 8-32 Threads on PM5
- M4 x 0.7 Threads on All Metric Versions
- Maximum Optic Heights from 0.97" to 1.65" (24.6 mm to 41.8 mm)
- Extension Posts Available to Increase Max Optic Height
- PM3SP(/M) with PM3(/M): Hold Optics up to 2.21" (56.1 mm) Tall
- PM4SP(/M) with PM4(/M): Hold Optics up to 3.61" (91.7 mm) Tall
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Clamping Arm Extension Posts with Metric Indicator Groove
Thorlabs' Clamping Arms provide clamping force to secure optics to our kinematic platform mounts, stages, and V-clamps. The PM3(/M) accommodates optics up to 0.97" tall and features a 0.69" center-to-center distance between the post and the nylon-tipped setscrew that holds the optic. The PM4(/M) accommodates optics up to 1.61" and features a 1.16" center-to-center distance between the post and the nylon-tipped setscrew. The maximum optic height of the PM3(/M) or PM4(/M) Clamping Arms can be extended using our PM3SP(/M) or PM4SP(/M) Extension Posts, respectively. These extension posts are identical to the posts included in each complete clamping arm. Each clamping arm features 6-32 (M4 x 0.7) threads. The PM3 and PM4 can be mounted in 8-32 tapped holes by using the AS6E8E thread adapter, which features internal 6-32 threads and external 8-32 threads. This thread adapter has an outer diameter of 0.24", which is the same as the PM4SP extension post and the post included with the PM4 clamping arm. This allows the clamping arm to be adjusted across the seam between either post and the adapter. The smaller diameters of the included post for the PM3 clamping arm and the PM3SP extension post cause the thread adapter to act as a stop for the clamping arm.
The PM5(/M) clamping arm is made entirely from heat-treated stainless steel, which helps maintain stability in fluctuating temperatures and provides vacuum compatibility. This clamping arm is recommended for use with the POLARIS-K1M4(/M), but it can be used with any platform mount or stage that has one or more 8-32 (M4 x 0.7) tapped holes. The PM5(/M) can hold optics up to 1.65" tall, and the distance from the post center to the contact point that holds the optic is 0.90".
Each clamping arm is attached to its post using a flexure mechanism that locks with a 5/64" (2.0 mm) balldriver or hex key. The setscrew on top of the clamping arm also accepts a 5/64" (2.0 mm) balldriver or hex key in order to clamp down on the optic. The post includes a through hole which can be leveraged for added torque when tightening down the post. Please see the diagram above for additional information.