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Kinematic Platform Positioners


  • Ideal for Kinematic Stops & Reference Edges
  • Allows Fine Positioning of Base Plates Prior to Lockdown

1/4"-20 (M6) Slot
(KL Positioners)

KL03

KL01

KL02L

Application Idea

A KL03L plunger provides the opposing force to a KL02 positioner. Using the KL02 adjuster, a BA2 base can move forward or backward, as indicated by the arrows.

1/4"-80
Adjustment Screw

Ball Tip Provides
One Point Contact

Spring Loaded
Plunger

APM07

3/16"-120 Fine Actuator and 1/4"-20 (M6) Taps

Related Items


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These kinematic positioners can be used individually or in functional groups for a variety of quick breadboard positioning and adjustment applications. The simple design and low cost make these mounts perfect alternatives for optomechanical positioning requirements when a precision translation stage is not necessary.


Posted Comments:
tcohen  (posted 2012-06-25 08:58:00.0)
Response from Tim at Thorlabs: Thank you for your interest in the KL01! The ball bearing used is Grade 440 Stainless Steel.
r.jackson  (posted 2012-06-22 15:50:34.0)
What is the material in the hardened ball (0.3125 dia) on the KL01 kinematic stop?

Fixed Kinematic Stops

Kinematic Breadboard Seats Application
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View Imperial Product List
Item #QtyDescription
Imperial Product List
MB81Aluminum Breadboard 8" x 8" x 1/2", 1/4"-20 Taps
DF11Delrin Breadboard Feet, Imperial (Set of 3)
KL012Fixed Kinematic Stop, 0.74" (18.8 mm) Long Slot
KL01L1Fixed Kinematic Stop, 1.50" (38.1 mm) Long Slot
BA2S63Spacer, 2" x 3", 0.500" Thick
SH25S06311/4"-20 Stainless Steel Cap Screw, 5/8" Long, Pack of 25
W25S05011/4" Washer, M6 Compatible, Stainless Steel, Pack of 100
View Metric Product List
Item #QtyDescription
Metric Product List
MB2020/M1Aluminum Breadboard, 200 mm x 200 mm x 12.7 mm, M6 Taps
DF1/M1Delrin Breadboard Feet, Metric (Set of 3)
KL012Fixed Kinematic Stop, 0.74" (18.8 mm) Long Slot
KL01L1Fixed Kinematic Stop, 1.50" (38.1 mm) Long Slot
BA2S6/M3Spacer, 50 mm x 75 mm, 12.5 mm Thick
SH6MS161M6 x 1.0 Stainless Steel Cap Screw, 16 mm Long, Pack of 25
W25S05011/4" Washer, M6 Compatible, Stainless Steel, Pack of 100
Breadboard with DF1 low-friction feet. The KL01 and KL01L kinematic stops preserve breadboard location.
  • Use as a Stop or Reference Edge
  • Hardened Steel Ball for One-Point Contact
  • 0.74" (18.8 mm) or 1.50" (38.1 mm) Long Slot for 1/4"-20 (M6) Cap Screws

Our Fixed Kinematic Stops can be used alone, in pairs to define a reference edge, or as a group of three to define a reference edge and stop. Each stop has a hardened steel ball for a true one-point contact on one end and a base that is machined with a wide, bottom-located relief cut for stable positioning when mounting to an optical table. The KL01 is convenient to use in space constrained applications because it has a smaller slot and more compact design. The KL01L has a longer slot, capable of spanning two tapped holes at a 45 degree angle on an optical table. This allows the KL01L to be secured to a table using two cap screws, providing more stability and resistance against rotation in a system. 

As shown in the photo to the right, the fixed kinematic stops are useful in repeatable positioning when swapping a base plate or breadboard in and out of an optomechanical setup. Our kinematic stops maintain the position of an MB8 Breadboard with DF1 Low-Friction Feet. To match the height of the breadboard and low-friction feet, each stop is mounted on a BA2S6 Spacer. A KL01 and KL01L are used to define a line on one edge of the breadboard, while one KL01 acts as a stop for the perpendicular edge of the breadboard. Thus, the breadboard can be removed from its position and returned with good repeatability.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
KL01 Support Documentation
KL01Fixed Kinematic Stop, 0.74" (18.8 mm) Long Slot
$16.28
Today
KL01L Support Documentation
KL01LCustomer Inspired! Fixed Kinematic Stop, 1.50" (38.1 mm) Long Slot
$22.66
Today

Spring-Loaded Plungers

Kinematic Breadboard Seats Application
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View Imperial Product List
Item #QtyDescription
Imperial Product List
KL021Adjustable Kinematic Positioner, 0.85" (21.6 mm) Long Slot
KL031Spring-Loaded Plunger, 0.85" (21.6 mm) Long Slot
KL03L1Spring-Loaded Plunger, 1.50" (38.1 mm) Long Slot
KL012Fixed Kinematic Stop, 0.74" (18.8 mm) Long Slot
BA21Mounting Base, 2" x 3" x 3/8"
PH21Ø1/2" Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L = 2"
TR31Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 3"
SH25S05011/4"-20 Stainless Steel Cap Screw, 1/2" Long, Pack of 25
W25S05011/4" Washer, M6 Compatible, Stainless Steel, Pack of 100
View Metric Product List
Item #QtyDescription
Metric Product List
KL021Adjustable Kinematic Positioner, 0.85" (21.6 mm) Long Slot
KL031Spring-Loaded Plunger, 0.85" (21.6 mm) Long Slot
KL03L1Spring-Loaded Plunger, 1.50" (38.1 mm) Long Slot
KL012Fixed Kinematic Stop, 0.74" (18.8 mm) Long Slot
BA2/M1Mounting Base, 50 mm x 75 mm x 10 mm
PH50/M1Ø12.7 mm Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L=50 mm
TR75/M1Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm
SH6MS121M6 x 1.0 Stainless Steel Cap Screw, 12 mm Long, Pack of 25
W25S05011/4" Washer, M6 Compatible, Stainless Steel, Pack of 100
A KL03L plunger is used to provide an opposing force against the KL02 positioner, such that turning the KL02's adjuster can move the BA2 base forward or backward, as indicated by the arrows.
  • High-Strength, Spring-Loaded, Plastic Plunger
  • Travel Range: 0.25" (6 mm)
  • 0.85" (21.6 mm) or 1.50" (38.1 mm) Long Slot for 1/4"-20 (M6) Cap Screws

Our Spring-Loaded Plungers can be used to hold an object firmly against Kinematic Stops or an Adjustable Positioner. The high-strength plastic plunger on both the KL03 and KL03L applies spring pressure over a travel range of 0.25" (6 mm). The plunger tension can be adjusted using a 5/32" (4.0 mm) hex key. The KL03 is convenient to use in space constrained applications because it has a smaller slot and more compact design. The KL03L has a longer slot, capable of spanning two tapped holes at a 45 degree angle on an optical table. This allows the KL03L to be secured to a table using two cap screws, providing more stability and resistance against rotation in a system.

In the photo to the right, one KL03 plunger is used with two KL01 kinematic stops while one KL03L plunger is used with a KL02 adjustable positioner to translate a BA2 base back and forth along a line. On one side of the base, two KL01 stops define a reference edge. On the opposite side, the KL03 presses the base against the two stops and prevents it from moving in the direction perpendicular to the reference edge. Along the other edges, the KL03L plunger presses against a KL02 adjustable positioner. Without the KL03L, the KL02 could only push the base forward. However, in this setup, as the KL02 is retracted, the KL03L provides an opposing force that pushes the base back. 

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
KL03 Support Documentation
KL03Spring-Loaded Plunger, 0.85" (21.6 mm) Long Slot
$30.50
Today
KL03L Support Documentation
KL03LCustomer Inspired! Spring-Loaded Plunger, 1.50" (38.1 mm) Long Slot
$39.14
Today

Adjustable Kinematic Positioners, 0.400" (10.16 mm) Travel

Kinematic Stops Application
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View Imperial Product List
Item #QtyDescription
Imperial Product List
BA21Mounting Base, 2" x 3" x 3/8"
KL012Fixed Kinematic Stop, 0.74" (18.8 mm) Long Slot
KL02L1Adjustable Kinematic Positioner, 1.50" (38.1 mm) Long Slot
KL031Spring-Loaded Plunger, 0.85" (21.6 mm) Long Slot
PH21Ø1/2" Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L = 2"
TR31Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 3"
SH25S05011/4"-20 Stainless Steel Cap Screw, 1/2" Long, Pack of 25
W25S05011/4" Washer, M6 Compatible, Stainless Steel, Pack of 100
View Metric Product List
Item #QtyDescription
Metric Product List
BA2/M1Mounting Base, 50 mm x 75 mm x 10 mm
KL012Fixed Kinematic Stop, 0.74" (18.8 mm) Long Slot
KL02L1Adjustable Kinematic Positioner, 1.50" (38.1 mm) Long Slot
KL031Spring-Loaded Plunger, 0.85" (21.6 mm) Long Slot
PH50/M1Ø12.7 mm Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L=50 mm
TR75/M1Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm
SH6MS121M6 x 1.0 Stainless Steel Cap Screw, 12 mm Long, Pack of 25
W25S05011/4" Washer, M6 Compatible, Stainless Steel, Pack of 100
A KL02L adjustable kinematic positioner is used to finely nudge forward a BA2 base held by two KL01 kinematic stops and one KL03 plunger. The arrow indicates the direction of motion.
  • Fine Control of Positioning
  • Travel Range: 0.400" (10.16 mm)
  • 0.85" (21.6 mm) or 1.50" (38.1 mm) Long Slot for 1/4"-20 (M6) Cap Screws

Our Adjustable Kinematic Positioners provide the same spherical contact as the Fixed Kinematic Stops presented above but adds fine adjustment capability with a 1/4"-80 actuator used as a "nudger." This feature allows for precise positioning not achievable by hand. These kinematic positioners are ideally used with two KL01 or KL01L stops to define a reference edge for a translation path. The KL02 is convenient to use in space constrained applications because it has a smaller slot and more compact design. The KL02L has a longer slot, capable of spanning two tapped holes at a 45 degree angle on an optical table. This allows the KL02L to be secured to a table using two cap screws, providing more stability and resistance against rotation in a system.

In the photo to the right, a KL02L kinematic positioner is used to nudge a BA2 base forward along a line. The line is defined by two KL01 stops which are positioned on one side of the base. A plunger on the opposite side of the base ensures that the base stays against both fixed kinematic stops while sliding forward.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
KL02 Support Documentation
KL02Adjustable Kinematic Positioner, 0.85" (21.6 mm) Long Slot
$24.37
Today
KL02L Support Documentation
KL02LCustomer Inspired! Adjustable Kinematic Positioner, 1.50" (38.1 mm) Long Slot
$31.93
Today

Adjustable Kinematic Positioner, 1/4" (M6) Counterbore


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View Imperial Product List
Item #QtyDescription
Imperial Product List
UBP21Universal Base Plate, 2.5" x 2.5" x 3/8"
KL031Spring-Loaded Plunger, 0.85" (21.6 mm) Long Slot
KL012Fixed Kinematic Stop, 0.74" (18.8 mm) Long Slot
APM051Adjustable Kinematic Positioner, 8-32 Flexure Locking Setscrew
SH25S06311/4"-20 Stainless Steel Cap Screw, 5/8" Long, Pack of 25
W25S05011/4" Washer, M6 Compatible, Stainless Steel, Pack of 100
View Metric Product List
Item #QtyDescription
Metric Product List
UBP2/M1Universal Base Plate, 65 mm x 65 mm x 10 mm, Metric
KL031Spring-Loaded Plunger, 0.85" (21.6 mm) Long Slot
KL012Fixed Kinematic Stop, 0.74" (18.8 mm) Long Slot
APM05/M1Adjustable Kinematic Positioner, M4 Flexure Locking Setscrew
SH6MS161M6 x 1.0 Stainless Steel Cap Screw, 16 mm Long, Pack of 25
W25S05011/4" Washer, M6 Compatible, Stainless Steel, Pack of 100
An APM05 Positioner Used with Stops to Finely Adjust a UBP2 Base Along a Straight Line
  • Fine Position Control via 120 TPI Fine Hex Adjuster
  • Maximum Travel Range: 0.96" (24.4 mm)
  • Side-Located Counterbore for 1/4" (M6) Cap Screws Facilitates Mounting to a Breadboard or Base 
  • Flexure Clamp Attaches to Either End of a Ø1/2" Post

The APM05(/M) Adjustable Kinematic Positioner allows for the precise positioning of breadboards or optomechanics. It contains a high-precision 3/16"-120 hex adjuster (Item # F19MS150) that has a maximum axial load capacity of 5 lbs (2.3 kg). It can be actuated using a 5/64" (2 mm) hex key, providing fine positioning. If longer or shorter translation ranges are required, the adjuster can be replaced with any other 3/16"-120 hex adjuster.

A side-located 1/4" (M6) counterbore allows the adjuster to be attached to a breadboardbase, or to the 1/4"-20 (M6) end of a Ø1/2" post using a 1/4"-20 (M6) cap screw. In addition, it can be mounted to a Ø1/2" post using a bottom-located flexure clamp, which is tightened using a side-located cap screw and a 9/64" (3 mm) hex key. When mounted via the flexure clamp, the adjuster will be centered on top of the post. In contrast, when mounted using the side-located counterbore, the adjuster will be offset to the side by 0.40" (10.2 mm).

This adjuster can be used with any 1/4"-20 (M6) tapped optomechanics or tables, as shown in the photo to the right. The photo shows the APM05 used in combination with two KL01 Stops and one KL03 Spring-Loaded Plunger to adjust the position of a UBP2 Universal Base Plate along a straight line.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
APM05 Support Documentation
APM05Adjustable Kinematic Positioner, 8-32 Flexure Locking Setscrew
$35.46
Today
+1 Qty Docs Part Number - Metric Price Available
APM05/M Support Documentation
APM05/MAdjustable Kinematic Positioner, M4 Flexure Locking Setscrew
$35.46
Today

Adjustable Kinematic Positioner, 1/4"-20 (M6) Tapped Holes


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View Imperial Product List
Item #QtyDescription
Imperial Product List
APM071Adjustable Kinematic Positioner, 1/4"-20 Taps
PH12Ø1/2" Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L = 1"
PH1.51Ø1/2" Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L = 1.5"
R2T1Thin Slip-On Post Collar for Ø1/2" Posts, 5 Pack
KMCP1Kinematic Mount Centering Plate
LMR11Lens Mount with Retaining Ring for Ø1" Optics, 8-32 Tap
APM061Spring-Loaded Plunger, Slip-On Ø1/2" Post Collar, 1/4"-20 Locking Setscrew
MB42414" x 24" x 1/2" Aluminum Breadboard, 1/4"-20 Double-Density Taps
TR22Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 2"
TR31Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 3"
View Metric Product List
Item #QtyDescription
Metric Product List
APM07/M1Adjustable Kinematic Positioner, M6 Taps
PH20/M2Ø12.7 mm Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L=20 mm
PH30/M1Ø12.7 mm Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L=30 mm
R2T1Thin Slip-On Post Collar for Ø1/2" Posts, 5 Pack
KMCP/M1Kinematic Mount Centering Plate, Metric
LMR1/M1Lens Mount with Retaining Ring for Ø1" Optics, M4 Tap
APM06/M1Spring-Loaded Plunger, Slip-On Ø1/2" Post Collar, M6 Locking Setscrew
MB1060/M1100 mm x 600 mm x 12.7 mm Aluminum Breadboard, M6 Double-Density Taps
TR50/M2Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 50 mm
TR75/M1Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 75 mm
APM07 Used with a KMCP Centering Plate to Translate a Lens, with a Spring-Loaded Plunger for Counterforce

Click for Details
View Imperial Product List
Item #QtyDescription
Imperial Product List
BA21Mounting Base, 2" x 3" x 3/8"
KL012Fixed Kinematic Stop, 0.74" (18.8 mm) Long Slot
APM071Adjustable Kinematic Positioner, 1/4"-20 Taps
KL031Spring-Loaded Plunger, 0.85" (21.6 mm) Long Slot
BA2S63Spacer, 2" x 3", 0.500" Thick
MB81Aluminum Breadboard 8" x 8" x 1/2", 1/4"-20 Taps
SH25S06311/4"-20 Stainless Steel Cap Screw, 5/8" Long, Pack of 25
W25S05011/4" Washer, M6 Compatible, Stainless Steel, Pack of 100
View Metric Product List
Item #QtyDescription
Metric Product List
BA2/M1Mounting Base, 50 mm x 75 mm x 10 mm
KL012Fixed Kinematic Stop, 0.74" (18.8 mm) Long Slot
APM07/M1Adjustable Kinematic Positioner, M6 Taps
KL031Spring-Loaded Plunger, 0.85" (21.6 mm) Long Slot
BA2S6/M3Spacer, 50 mm x 75 mm, 12.5 mm Thick
MB2020/M1Aluminum Breadboard, 200 mm x 200 mm x 12.7 mm, M6 Taps
SH6MS161M6 x 1.0 Stainless Steel Cap Screw, 16 mm Long, Pack of 25
W25S05011/4" Washer, M6 Compatible, Stainless Steel, Pack of 100
APM07 Being Used with a BA2 Base to Translate a Breadboard, with Two KL01 Stops and One KL03 Being Used to Create a Line for Translation
Filter Box
Click to Enlarge
APM07 on a Rail Carrier to Finely Position Rail-Mounted Optomechanics
  • Fine Position Control via 120 TPI Fine Hex Adjuster
  • Maximum Travel Range: 0.66" (16.76 mm)
  • Two 1/4"-20 (M6) Taps for Attachment to Bases or Ø1/2" Posts

The APM07(/M) Adjustable Kinematic Positioner allows for the precise positioning of breadboards or optomechanics. It contains a high-precision 3/16"-120 hex adjuster (Item # F19MS150) that has a maximum axial load capacity of 5 lbs (2.3 kg). It can be actuated using a 5/64" (2 mm) hex key, providing fine positioning. If longer or shorter translation ranges are required, the adjuster can be replaced with any other 3/16"-120 hex adjusterThe positioner features two 1/4"-20 (M6) taps for mounting.

This adjuster can be used with optomechanics that offer 1/4"-20 (M6) taps at 1" (25 mm) spacings. The photo to the right shows the APM07 used in combination with two KL01 Stops and one KL03 Spring-Loaded Plunger to adjust the position of an aluminum breadboard along a straight line. The photo to the left shows the APM07 mounted on a 34 mm Rail using an XT34D2-50 Mounting Platform to provide positional adjustment of rail-mounted optomechanics.

Alternatively, this adjuster can be mounted on a Ø1/2" post using a 1/4"-20 (M6) cap screw or setscrew as shown in the photo above. The photo shows the APM07 used with the APM06 Spring-Loaded Plunger to adjust the position of a lens mounted on the KMCP Centering Plate. The adjuster will be offset from the center of the post by 1/2" (12.7 mm) making it ideal for setups on Double Density Breadboards.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
APM07 Support Documentation
APM07Adjustable Kinematic Positioner, 1/4"-20 Taps
$31.26
Today
+1 Qty Docs Part Number - Metric Price Available
APM07/M Support Documentation
APM07/MAdjustable Kinematic Positioner, M6 Taps
$31.26
Today
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Last Edited: Dec 11, 2013 Author: Lori Stover