Products Home / Actuators, Adjusters, & Transducers / Adjustment Screws / 1/4"-80 Fine Hex Adjusters1/4"-80 Fine Hex Adjusters
- Tolerance Better Than a Class 3 Fit
- Adjuster Lengths: 3/8" to 4"
- Adjustment Knobs and Threaded Bushings are Also Available
F25SSK1L
F25SSK1
N80L6P
F25ST075
5/64"
Hex Socket
F25SS400
FAS150
F25SC1
LN2580
F25SSK1-MULTI
(16 Pack)
F25SSN2P
F25SSK1S
Please Wait
| Selection Guide for Adjustment Screws |
|---|
| Imperial |
| 6-80 |
| 3/16"-100 |
| 3/16"-120 |
| 1/4"-80 |
| 1/4"-80 with Differential Adjuster |
| 1/4"-100 |
| 1/4"-100 Matched Adjuster/Bushing Pair |
| 1/4"-170 Matched Adjuster/Bushing Pair |
| 3/8"-100 |
| Metric |
| M2 x 0.20 |
| M2.5 × 0.20 |
| M3 × 0.20 |
| M3 × 0.25 |
| M4 x 0.25 |
| M6 × 0.25 |
Click to Enlarge
The KM100 Mirror Mount uses the F25SS100 adjuster screws sold below. It is shown here with LN2580 Lock Nuts and F25SSK1-RED Red Knobs.
Features
- 80 TPI Fine Adjustment
- Adjusters Manufactured from 303 Stainless Steel
- Hex Adjusters Have a 5/64" (2.0 mm) Hex Socket
- Adjusters and Knobs with Side Holes for a 5/64" (2.0 mm) Hex Key
- Removable Adjustment Knobs Available for Hex Adjusters
- Adjusters with Integrated Adjustment Knob
- Threaded Bushings, Lock Nuts, and Locking Collars for Threading Integration
- Barrel Adapters for Integration with Linear Translation Stages
Thorlabs has developed a set of specifications for adjusters and related accessories that exceed the industry class 3 thread tolerance standard by as much as 30%. All of our fine hex adjuster screws are made to these extremely tight tolerances. Each screw is individually tested with a master gauge set that ensures the interchangeability of our adjuster screws and threaded bushings.
If you are incorporating any of these components into larger optomechanical systems, please ensure that the specifications for any mating parts you are manufacturing have the appropriate tolerances. For more details, please see the Integration tab.
Integrating Fine Adjustment Screws Into Optomechanical Systems
The assembly process begins by producing the appropriately sized mating hole for the threaded bushing. The recommended bore diamaters can be found with the product information for each bushing sold below. Given the close fit between the threaded bushing and the mating adjuster screw, we caution against using a press fit to assemble these products. For our own production needs, we use a permanent anaerobic adhesive that provides excellent long-term performance. Locking bushings with nuts do not require adhesive as they are held in place by the locking nut.
We recommend using Loctite Anaerobic Adhesive product number 680 or equivalent. In order to ensure maximum strength between the bonded parts, we strongly urge the user to follow carefully the instructions provided by Loctite, which specify the amount of clearance between the threaded bushing and the mounting plate. The most common source of failure is not allowing for the proper clearance between the parts being bonded since this clearance provides for the proper volume of adhesive.
When assembling, apply a small amount of the Loctite adhesive to the threaded bushing only. Rotate the bushing as it is installed to ensure a uniform distribution of the adhesive. After insertion, remove any excess adhesive from around the part.
As shown in the figure to the right, the flange on the mating bushing is designed to support the axial load of the screw and bushing assembly.
OEM & Custom Precision Screws
Thorlabs manufactures custom and high volume OEM precision screws and bushings with various diameters, lengths, and threads. To inquire about custom or OEM precision screws, please contact Technical Support or use the "Contact Us" form to the right. A specialist will contact you within 24 hours or the next business day.
Precision Screw Capabilities
Thorlabs' in-house machine shop, located in Newton, NJ, gives us the ability to quickly produce large quantities of precision screws and bushings. We are equipped to manufacture screw diameters ranging from 2 mm to 20 mm with lengths up to 165 mm and a maximum thread pitch of 200 TPI. Our standard adjuster screw design has a hardened steel ball tip to provide a single point of contact; for other applications we are able to provide adjusters without the steel ball. Custom orders can be achieved on a case-by-case basis. For large orders of an item, Thorlabs passes on to the customer the cost savings associated with planned production of high volumes of that item. For more information on Thorlabs' discount pricing policy, click the "V" link to the right. We also offer a large variety of stock precision screws, which are available here.
Fast Turn-Around Times
Our experienced, highly skilled machinists are running our on-site Citizen Swiss Screw Machines 24 hours a day, allowing us to produce high-volume custom and OEM orders. Each machine is capable of running unattended, producing one screw every 30 to 120 seconds. This flexibility allows us to fulfill multiple orders at once without sacrificing quality.
High Quality
Thorlabs inspects all of our fabricated precision screws and bushings after the initial fabrication process and right before packaging. All inspections adhere to the ANSI AQL1.5 acceptable quality level, which states that if a certain percentage, based upon the amount of product in a certain lot, does not meet specification, then the entire lot is not sold. This ensures that all customers receive the highest quality product every time and that all items will be of equal performance.
Precision Screw Production
| Posted Comments: | |
xavier DDU
(posted 2021-11-26 08:38:45.737) Hello,
I can't figure out how to remove the adjustment knobs on my KS1T unit. How can I replace them ? Thanks, X cdolbashian
(posted 2021-12-01 04:12:41.0) Thank you for reaching out to us Xavier! In order to remove the knob from the adjustment screw, simply insert a 5/64" hex key into the center of the adjustment knob. While holding that fixed in place, turn the adjustment knob counter-clockwise. It isn't fixed with any adhesive, so it should easily be removed. Erik Hugel
(posted 2021-01-05 21:35:54.273) Can you recommend some alternate adhesives for bonding the F25SSN2P bushing into an aluminum housing? Would Loctite 603 be acceptable? llamb
(posted 2021-01-09 10:48:31.0) Thank you for contacting Thorlabs. We primarily use and recommend Loctite 680 for bonding bushings into aluminum housings/products, as 680 offers low viscosity for a smoother fitting of that bushing into the aluminum bore. Loctite 603 should be fine as well, though being a little more viscous, this may depend on the tolerance of fit between your bushing and aluminum bore. Marshall Scott
(posted 2020-01-07 13:01:28.36) Even though they have no inherent moving parts and don't spin on end like a top, items like FAS200 are excellent fidget object, which surprised me. I think it has a lot to do with the density of the stainless steel--it has a good weight. I've also observed that if you remove the ball bearing and stand it on end, there are many people who can't resist picking it up when visiting my desk, even people that I don't identify is fidgeters. 5 stars. YLohia
(posted 2020-01-08 10:21:26.0) Thank you for your feedback. We are always happy to see creative uses of our products in the lab. Jean-Baptiste Le Bouquin
(posted 2019-12-18 02:56:05.867) Hi, we are using the screw F25SS150 with barrel F25SS150 in a cold (-70degC) and cryogenic environment (10-5mbar). Can you share some information about the lubricant used at Thorlabs to pre-grease these components ? So we can check the compatibility, and decide if we need to clean and re-lubricate ? Thanks you very much! JB YLohia
(posted 2019-12-18 11:22:28.0) Hello, thank you for contacting Thorlabs. These components use the Apiezon M grease. The typical operating temperature range is specified to be 10 to 30 C by the manufacturer of the grease. mojtaba.zamani.a
(posted 2017-01-17 02:40:08.127) Hi. is there any volume pricing for F25SS100 and F25SSN2P? i want to buy about 100 pieces of each part number. tfrisch
(posted 2017-01-18 06:02:17.0) Hello, thank you for contacting Thorlabs. A sales representative will reach out to you with volume pricing. tcohen
(posted 2012-04-16 11:51:00.0) Response from Tim at Thorlabs: Both the FAS300 and the F25SS300 utilize a 303 SS adjuster with a 440 SS ball bearing. We may be able to provide a custom solution for your needs. I will contact you to get more information. eloy
(posted 2012-04-16 15:18:42.0) Dear Sirs,
We need non-magnetic fine adjusment screws. We would like to know the material in which your scews like model FAS300 or F25SS300 are made.
Thank you very much in advance.
Sincerelly
Eloy Perez tcohen
(posted 2012-04-04 15:51:00.0) Update from Tim at Thorlabs: We will be introducing oversized knobs for the Polaris soon and we are looking into offering color-coded Polaris knobs as well. tcohen
(posted 2012-04-04 10:49:00.0) Response from Tim at Thorlabs: The color-coded adjustment knobs are ¼”-80 and as you mentioned, the POLARIS-K1 knobs are ¼”-100. As a note, the KM100 is Black Anodized Aluminum and the Polaris is Stainless Steel. Color-coded adjustment knobs for identification of different POLARIS-K1 mounts in a setup would be a great addition and I am discussing your suggestion with our design team. Thank you for your feedback! user
(posted 2012-03-31 18:29:29.0) I don't think the new red knobs will fit on a Polaric mount? Can you make some that do? The reason they will not go on is the threading is difference. The Black mounts have 80 threads and the Metal mount has 100 threads so it will not screw on but it might go on just a little bit but then it will get stuck. If you want I will show you how to work it. It is not very to hard to do it. Also, you can make your black mount with the same nice colors, not just the knobs. But you can't do it with the metal mount that is the Polaric because it is made of metal and you can't make it colored. That is why it is silver only. I don't think you know this but I do. I can help you be smarter. Adam
(posted 2010-05-07 11:07:09.0) A response from Adam at Thorlabs to rpanosh: We do not suggest removing the grease before installation. We grease the screws up before packaging to make it easier for customers to install these in the bushings. rpanosh
(posted 2010-05-06 18:16:34.0) Feedback,
I recently purchased the FAS100 with the F25SSN2 bushing for leveling screws. I read the Integration tab for installation and understand the assembly. The FAS100 bags have grease on the threads that I assume should be removed from the S.S. body before use. Should any lubricant be used for final assembly? Thanks. Richard acable
(posted 2007-08-27 15:03:30.0) I did an internal search on "adjuster" and ended up on this page, now i want to see all the other adjusters that Thor offers and have no easy way to do so, please consider filling in the Related Items tab with all the closely related adjuster products. |
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Our high precision 1/4"-80 Fine Hex Adjusters can be adjusted with a 5/64" (2.0 mm) hex key, 1/4"-80 removable adjustment knobs (sold below), or HKTS-5/64 hex key knobs (sold below). The F25SS series adjusters have a maximum axial load capacity of 15 lbs (6.8 kg). The adjuster body is constructed of 303 stainless steel and comes pregreased to ensure smooth mating into compatible components. The ball tip is constructed using 440 stainless steel that is fixed onto the adjuster using epoxy.
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F25ST adjusters include side holes for fine adjustments with a 5/64" (2.0 mm) balldriver.
These high precision 1/4"-80 Fine Hex Adjusters feature two side through holes for a 5/64" (2.0 mm) hex key or balldriver as well as an end-located 5/64" (2.0 mm) hex socket. The side holes provide the user with a method for more precise adjustments. These adjusters can also be adjusted with HKTS-5/64 hex key knobs (sold below), but they are not compatible with standard 1/4"-80 removable adjustment knobs.
The F25ST series adjusters have a maximum axial load capacity of 15 lbs (6.8 kg). The adjuster body is constructed of 303 stainless steel and comes pregreased to ensure smooth mating into compatible components. The ball tip is constructed using 440 stainless steel that is fixed onto the adjuster using epoxy.
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These high precision 1/4"-80 Fine Adjustment Screws are similar to the adjusters sold above, but with a knob permanently installed on one end. The non-slip knurled Delrin®* knob improves adjustment sensitivity. Our FAS series adjusters have a maximum axial load capacity of 15 lbs (6.8 kg). The adjuster body is constructed of 303 stainless steel and comes pregreased to ensure smooth mating into compatible components. The ball tip is constructed using 440 stainless steel that is fixed onto the adjuster using epoxy.
*Delrin is a registered trademark of DuPont Polymers, Inc.
Zoom- Material: 510 Phosphor Bronze (Vacuum Rated for 10-6 Torr)
- Recommended Bore Diameter: 0.3395" +0.0005"/-0.0000"
Our 1/4"-80 threaded phosphor bronze bushings are commonly used in slip fit applications where fine adjusters are needed. The recommended bore diameter for our 1/4"-80 bushings is 0.3395" +0.0005"/-0.0000". The longer bushing (F25SSN1P) allows for increased stability, while the shorter bushing (F25SSN2P) can be used when space is a constraint. The 510 Phosphor Bronze material is also vacuum compatible for 10-6 Torr; prior to use in vacuum applications, we recommend a thorough ultrasonic cleaning to remove any grease or particulates. Due to the tolerances of our fine adjusters, we discourage press fitting these bushings. Please see the Integration tab for more information.
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- Material: 510 Phosphor Bronze (Vacuum Rated for 10-6 Torr)
- Adapts 1/4"-80 Adjusters to Ø3/8" Barrel Size
- Recommended Bore Diameter: 0.375" +0.002"/-0.000"
These 1/4"-80 threaded to Ø3/8" barrel adapters are made from 510 Phosphor Bronze (vacuum rated for 10-6 torr). They allow our 1/4"-80 adjusters to be used with linear translation stages that accept actuators with Ø3/8" (Ø9.5 mm) barrels. The photo to the right shows an adjuster screw used as a replacement for the actuator included with the translation stage. For vacuum applications, we recommend a thorough ultrasonic cleaning to remove any grease or particulates prior to use.
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- Material: 510 Phosphor Bronze (Vacuum Rated for 10-6 Torr)
- Installed Using the 1/2" Hex Locking Nut
- Adjuster Screws Can be Locked in Place with the 2-56 Setscrew
- Recommended Bore Diameter: 0.375" +0.002"/-0.000"
These 1/4"-80 threaded bushings are made from 510 Phosphor Bronze (vacuum rated for 10-6 torr) and include a removable nut with a 1/2" hex. They can be mounted in a clearance hole, using the 1/2" hex nut to lock them into place. Adjusters installed in these bushings can be locked in place via a 2-56 setscrew using a 0.035" (0.9 mm) hex key. For vacuum applications, we recommend a thorough ultrasonic cleaning to remove any grease or particulates prior to use.
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- Material: 510 Phosphor Bronze (Vacuum Rated for 10-6 Torr)
- Compatible with Any Thorlabs 1/4"-80 Adjusters
- Minimal Beam Shift When Locking Mirror Mount
- Make Any Mount with 1/4"-80 Adjusters Lockable
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Click to Enlarge
Two Collars Can be Locked Together to Create a Hard Stop
Click to Enlarge
A Single Locking Collar Can Lock an Adjuster in Position
- Extremely Compact Lock Nut: 0.05" (1.1 mm) Thick
- Use One Collar To Lock an Adjuster to a Bushing
- Use Two Collars to Create a Hard Stop on an Adjuster
- Sold in Packages of Five
- Install and Remove with the SPW402 Spanner Wrench (Sold Below)
These locking collars are compact alternatives to the lock nuts sold above. They are only 0.05" (1.1 mm) thick and are constructed of 303 stainless steel. They are compatible with all of the 1/4"-80 adjusters sold on this page, as well as those used in many of our mirror mounts and stages.
As shown in the photos to the right, they can be used to lock an adjuster in a desired position or to create a hard stop at any position to prevent overdriving an adjuster. In addition to using two collars to create a hard stop, as shown in the photo to the far right, a single collar can be epoxied to an adjuster using our G14250 epoxy to create a permanent hard stop. We recommend the SPW402 Spanner Wrench to install or remove these locking collars.
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F25SSK1L Removable Adjustment Knob (Lower-Left Adjuster) on a KM200 Mount
- Use with 1/4"-80 Adjusters
- Ø0.15" (Ø3.9 mm) Clearance Hole
- Available in 2 Sizes
- Ø0.58" (15 mm) or Ø0.83" (21.1 mm) Diameter Knob
Our F25SSK1 and F25SSK1L removable aluminum adjustment knobs thread onto our 1/4"-80 F25SS series hex adjusters, which can be found on many of our kinematic mounts, and allow for the use of an adjuster without a hex key. This provides quick and easy adjustments for a broad range of applications. We offer two sizes of adjustment knobs. Our standard size (F25SSK1) has a 0.58" diameter, while our larger size (F25SSK1L) has a 0.83" diameter.
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F25SSK1S has a small diameter and includes side holes for adjustment with a 5/64" (2.0 mm) hex key.
- Use with 1/4"-80 Adjusters
- Ø0.15" (Ø3.8 mm) Clearance Hole for Accessing the Adjuster with a Balldriver
- Six Ø0.09" (2.4 mm) Holes on the Sides of the Knob Compatible with a 5/64" (2.0 mm) Balldriver
- Ø0.35" (8.9 mm) Diameter Knob
Our F25SSK1S Low-Profile, Removable Adjustment Knobs thread onto our 1/4"-80 F25SS series hex adjusters, which can be found on many of our kinematic mounts, and allow for the use of an adjuster without a hex key. This provides quick and easy adjustments for a broad range of applications. In addition, these knobs feature six equally spaced actuation holes along the outer diameter of the knob that can be engaged with a 5/64" (2.0 mm) balldriver or hex key, as shown in the image to the right. The side holes provide the user with a method for more precise adjustments and allow the user an easier method of turning the knob when access to the knob is limited in an experimental setup. The small diameter (Ø0.35") of this knob also allows kinematic mounts, such as the KS1, to be attached directly to an optical table or breadboard, as shown in the image to the right.
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F25SSK1-MULTI Color-Coded Knobs on a KS1 Mount
- Allows for Easy Identification of Certain Mounts in a Setup
- Available in 8 Different Colors
- Use with 1/4"-80 Adjusters
- Ø0.15" (Ø3.9 mm) Clearance Hole
- Ø0.58" (14.7 mm) Diameter Knob
These color-coded aluminum knobs thread onto the 1/4"-80 F25SS series hex adjusters (found on our KM and KS series kinematic mounts) and allow for the use of an adjuster without a hex key. This provides quick and easy adjustments for a broad range of applications. These knobs are interchangeable, and the variety of anodized colors available allows the user to easily tag and identify certain mounts in the setup. They are available in packages of 10 knobs, except for the F25SSK1-MULTI, which is a package of 16 (2 of each color).
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- For Convenient Adjustment of 5/64" and 2 mm Hex-Driven Actuators
- Red Anodized Adjustment Knob with Engraved Hex Size
- Replaceable Hex Tip
- Sold in Packages of 4
These 5/64" Hex Key Adjuster Thumbscrews allow for quick adjustment of many 5/64" and 2 mm hex-driven actuators (or standard actuators with the knobs removed). These temporary knobs can be left in the screw's hex socket between adjustments for convenience (see photo to the right). An 8-32 setscrew (5/64" hex) secures the replaceable hex bit, which can be reversed if the tip is stripped. Contact Tech Support to order replacement hex key bits.
We offer hex key thumbscrews in sizes from 0.050" to 3/16" and 2 mm to 5 mm.
1/4"-80 Adjustment Screws