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CMM Fixture Plates, Aluminum


  • Hard-Coat Anodized for Increased Durability
  • 1/4"-20 Tapped Through Holes for Mounting
  • Ideal for CMM Metrology Applications

 

Alphanumeric Labels
Allow for Mounting
Hole Identification

CMMP1818

Aluminum Fixture Plate / Breadboard

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Item # CMMP1818 CMMP2424
Size 18" x 18"
(457.2 mm x 457.2 mm)
24" x 24"
(609.6 mm x 609.6 mm)
Material Aluminum
Finish Hard-Coat Anodized
Thickness 0.50" (12.7 mm)
Flatness ±0.006" (±0.15 mm) over 1 ft2
Hole Size
and Spacing
1/4"-20 Tapped Holes on 0.5" Centers
Number of
Mounting Holes
1089 2025
Distance from
Edge to First Hole
1.0" on All Sides
CMM Fixtures
Click to Enlarge

These fixture plates provide the ideal platform for constructing modular fixture systems for use in CMM Metrology. See the Application Idea tab for details.

Features

  • Hard-Coat Anodized Aluminum Fixture Plates
  • Two Sizes:
    • 18" x 18" (457.2 mm x 457.2 mm)
    • 24" x 24" (609.6 mm x 609.6 mm) 
  • On-Axis Alphanumeric Labels Indicate Mounting Hole Locations
  • 1/4"-20 Through Tapped Holes on 0.50" (12.7 mm) Centers
  • Highly Durable and Resistant to Wear and Abrasions
  • Ideal for Modular Fixturing and Coordinate Measuring Machine (CMM) Metrology

These solid aluminum, nonmagnetic fixture plates, also known as breadboards, have been hard-coat anodized for increased abrasion resistance and durability. They provide the ideal platform for modular CMM fixturing (see Application Idea tab for details), prototyping optical assemblies, conducting experiments, and mounting smaller subsystems. 

Each CMM  fixture plate features a pattern of 1/4"-20 tapped through holes, spaced 0.5" (12.7 mm) apart, that is offset by 1.0" (25.4 mm) from the edges of the board. This allows for an increased number of mounting options for components when compared to breadboards that have a standard 1" or 25.0 mm hole pattern or an offset double-density 0.5" or 12.5 mm hole pattern. The holes are threaded completely through these plates, allowing components to be mounted on both sides at once. Within the 1.0" wide, untapped region on each side are on-axis alphanumeric labels for identifying specific rows, columns, or mounting holes and allowing for repeatable experimental setups or modular fixturing.

Other Breadboard Options
For vision/video metrology applications, Thorlabs offers optically clear acrylic breadboards that offer high transmission in the visible and near-IR regions of the spectrum. Thorlabs also offers black-anodized solid aluminum breadboards with a 1" hole spacing and double hole density aluminum breadboards with 1/2" offset hole spacing. These are offered in various sizes ranging from 4" x 6" to 30" x 30" (100 mm x 150 mm to 750 mm x 750 mm) with thicknesses of 0.5" (12.7 mm), making their slim profile ideal for compact work areas. Circular breadboards are also available with an offset double-density hole pattern.

For vacuum applications, we recommend using our selection of Unanodized Circular or Rectangular Solid Aluminum BreadboardsFor limited space applications, Thorlabs offers the MS12B and MS12B/M Mini-Series Breadboards. These breadboards feature increased tapped hole density and thinner breadboard thickness.

CMM Fixtures
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30 mm Cage Cube Fixed in Place Using Ø1/2" Posts, a Post Holder, a Base, a PM3/M Clamping Arm, and Setscrews

CMM Modular Fixturing

Thorlabs' CMMP1818 and CMMP2424 fixture plates provide the ideal platform for constructing modular fixture systems for use in CMM Metrology. Fixturing is the process of securing an object prior to scanning with a CMM. Modular fixturing is where off-the-shelf components are used to secure these objects without the need for custom machining. Compared to permanent custom fixturing, it is a cost effective method to secure prototypes, small or last-minute production runs, or one-time projects. Modular systems also allow for repeatable, accurate, and fast fixturing setups to be created at any time to hold any object that needs to be scanned. Thorlabs' solid aluminum CMM plates feature a durable hard-coat finish, 1089 or 2025 1/4"-20 mounting taps, and on-axis alphanumeric labels to help simplify the creation of these custom fixtures.

Material and Finish
Crafted from solid aluminum, our fixture plates are able to support larger components while still being lightweight for easy repositioning or movement on the work floor. Each board is hard-coat anodized for increased scratch, wear, and corrosion resistance. This coating also provides a smoother and harder surface ideal for metrology applications.

Fixture Mounting
Our plates are available in two sizes, 18" x 18" and 24" x 24", providing a large staging area capable of securing multiple objects using modular fixtures. Each has a pattern of 1/4"-20 tapped through holes, spaced 0.5" (12.7 mm) apart, that is offset by 1.0" (25.4 mm) from the edges of the board. Engraved on every side of the plate are on-axis alphanumeric labels which aid in creating reference points by identifying specific rows, columns, or mounting holes. This greatly reduces setup times and increases the repeatability between different operators.

A simple modular fixturing setup constructed on our CMMP1818 fixture plate is shown to the right. In this application a 30 mm cage cube is being fixed in place using Thorlabs' Ø1/2" post assemblies. Four TR075 0.75" Long Posts are used to create a corner base for repeatable positioning, while a fifth one is mounted on a BA1S Base to create an adjustable fifth point of contact that applies pressure on the cube, holding it in place. Finally, a post holder and metric post are combined with a PM3/M Clamping Arm to clamp the cube in place from above. Please note that our imperial Ø1/2” posts have 8-32 taps and are incompatible with the imperial PM3 clamping arms, which contain 6-32 mounting studs.

Hysteresis Loop of Piezoelectric Actuator
Click to Enlarge

Unanodized Aluminum Post Holder
Hysteresis Loop of Piezoelectric Actuator
Click to Enlarge

Type-II Anodized Aluminum Post Holder

The anodizing of aluminum is a widely utilized conversion coating technique applied to a wide range of materials and employed in various decorative and engineering applications. In the simplest of terms, anodizing is an electrochemical process that modifies the parent material’s surface hardness, reflectivity, lubricity, adhesion, light suppression, and electrical /thermal insulating properties. While the anodizing process can be performed on a variety of electrically conductive materials, it is predominantly used to plate aluminum, thereby improving the component’s surface properties.

Within the anodizing process, there are three alternative processes that, while similar, produce slightly different end properties: Type-I (Chromic Acid Anodize), Type-II (Sulfuric Acid Anodize), and Type-III (Hard Anodize). An explanation of each process is provided below. The main purpose of these three processes is to control the oxidation reaction that occurs naturally when raw aluminum is exposed to oxygen in the atmosphere.

The anodizing process starts by mounting the substrate/parts to be anodized onto a conductive rack/jig (usually constructed from titanium or aluminum); these racks are then immersed into an electrolyte solution, which has a composition that is similar to battery acid. A DC power supply is then added to the entire cell/anodizing system; this promotes electrolysis of water within the electrolyte via electron transfer and separation of water molecules, which in turn promotes oxygen evolution at the anode (hence the term anodizing).

This reaction forms a tightly packed hexagonal structured layer on the exposed surfaces of the aluminum components. Once hydrated/sealed (in most cases), the resulting item has improved corrosion resistance and is electrically insulated. The density, thickness, and sometimes color of the resultant anodic film can be precisely controlled through the use of various electrolyte solutions, concentrations, temperatures, and current densities. After this initial conversion coating has taken place, various different chemical species (i.e., PTFE, metallic species, or colored pigments) can be adsorbed / deposited into the oxidized film, which can further enhance the Anodic film’s performance or aesthetics.

Hysteresis Loop of Piezoelectric Actuator
Click to Enlarge

Type-III Anodized Aluminum Post

Type-I Anodization
Type-I (Chromic Acid Anodizing) Oxidation is generally utilized for aerospace applications (soon to be replaced by Tartaric Anodizing) or general bonding applications. The standard film thickness is between 0.5 µm to 18 µm, making it too thin for external use. This type of plating provides a moderate improvement in corrosion resistance and electrical insulation as well as excellent adhesive bonding properties due to the film structure.

Type-II Anodization
Type-II (Sulfuric Acid Anodizing) Oxidation is widely used for architectural and decorative purposes due to its film structure and performance capabilities. Typical film thicknesses can range between 5 µm and 25 µm. The increased film thickness and differences in film structure compared to Type-I provide an increase in the film’s abrasion resistance and electrical insulation. Films such as Type I and Type II can be machined post anodizing; however, due to the increase in hardness introduced by the anodic film tool, the lifetime of the cutting tool will be diminished.

Type-III Anodization
Type-III (Hard Anodizing/Hard-Coat) Oxidation is the thickest, densest, and most robust type of anodizing available and is predominantly used exclusively for engineering purposes. It has a typical thickness between 25 µm to 150 µm and is often referred to as ‘Hard Anodizing’ or ‘Hard Coat Anodizing’. The increased thickness and film density produced by this type of anodizing make an extremely hard and very rugged coating with a greatly reduced wear-and-tear characteristic. This Anodic process exhibits all of the benefits offered by Type-II, but provides a lower co-efficient of friction, better corrosion resistance, and maximum surface hardness. However, due to the increased thickness and hardness of this type of anodizing, components anodized in this way cannot be easily machined post processing without specialist tooling.

Most Thorlabs components feature a Type-II matte-black anodized finish to promote light-absorption and provide improved wear resistance, while maintaining the ability to be machined with common tooling. In certain Thorlabs designs, Type-III or “Hard Coat Anodizing” has been chosen to offer maximum surface-hardness and wear resistance due to the requirements presented by the product’s intended application, such as our TRA series non-magnetic, low-reflectivity aluminum posts.


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Breadboards Aluminum Breadboard
Nexus, Optimized Damping
Steel Breadboard
Intrinsically Damped
Aluminum Breadboard
Aluminum Honeycomb
Stainless Steel Breadboard
Stainless Steel
Solid Aluminum Breadboard
Solid Aluminum
Acrylic Breadboard
Optically Clear Acrylic
Construction
Breadboard Thickness 60 mm (2.4")
110 mm (4.3")
58 mm (2.28") 25 mm (0.98")
55 mm (2.2")
12.7 mm (0.5") 7.0 mm (0.28")
9.5 mm (0.375")
12.7 mm (0.5")
19.05 mm (0.75")
12.7 mm (0.5")
Working Surface 430 Grade Stainless Steel or 304L Grade Nonmagnetic Steel Top Plate 430 Grade Stainless Steel Top Plate Aluminum 416 Grade Stainless Steel Solid Aluminum
Anodized or Unanodized
Acrylic
Top Skin 5 mm (0.20") 5 mm (0.20") 6 mm (0.24") N/A N/A N/A
Bottom Skin 5 mm (0.20") 3 mm (0.12") 3 mm (0.12") N/A N/A N/A
Core Design High-Density Plated Steel Honeycomb, 0.26 mm Thick High-Density Plated Aluminum Honeycomb N/A N/A N/A
Side Panels Rigid Steel Box Section Unplasticized Polyvinyl Chloride (uPVC) Black Laminated
Aluminum Sides
N/A N/A N/A
Ferromagnetism Magnetic or Non-Magnetic Options Magnetic Non-Magnetic Magnetic Non-Magnetic
Sealed Holes Sealed (25 mm Depth) or Non-Sealed Options Non-Sealed N/A N/A N/A
Thread Options 1/4"-20 (M6) Tapped Holes 1/4"-20 (M6) Tapped Holes 1/4"-20 (M6) Tapped Holes 1/4"-20 (M6), 4-40 (M3), or
8-32 (M3) and 1/4"-20 (M6) Tapped Holes
1/4"-20 Tapped Holes
Spacing 1" (25 mm) Centers 1" (25 mm) Centers 1" (25 mm) Centers 1" (25 mm) Centers or
0.5" (12.7 mm) Centers
0.5" (12.7 mm) Centers
Distance from
Edge to First Holes
0.5" (12.5 mm) on all Sides 0.5" (12.5 mm) or
1.0" (25 mm) on all Sides
0.5" (12.5 mm) on all Sides 0.5" (12.5 mm) on all Sides 1.0" (25.4 mm) on all Sides
Performancea
Damping Nexus Damping Bar Nexus Damping Bar Nexus Damping Bar N/A N/A N/A
Stiffness Nexus Damping Bar 
60 mm (2.4") Thick
Nexus Damping Bar 
58 mm (2.28") Thick
Nexus Damping Bar 
25 mm (0.98") Thick
Nexus Damping Bar12.7 mm (0.5") Thick Nexus Damping Bar
7.0 mm (0.28") Thick
12.7 mm (0.5") Thick
Nexus Damping Bar 
110 mm (4.3") Thick
Nexus Damping Bar 
55 mm (2.2") Thick
Nexus Damping Bar 19.05 mm (0.75") Thick
  • The damping and stiffness performance shown here is qualitative and does not relate to exact specifications of each breadboard.

    Optical Breadboard Selection Guides

    The selection guides below list every size offered for our honeycomb, solid aluminum, and acrylic breadboards. Simply locate the specific width and length needed and then select the type of breadboard. Expand each table by clicking the More [+] button within the header.

    Thorlabs also offers several unique breadboard solutions. For applications requiring temperature control, we offer anodized aluminum water cooled breadboards in several sizes, in addition to a temperature-controlled mini-series breadboard for small-scale operations. Our anodized aluminum large-area translation stages and rotating breadboards offer hand-operated positioning control, while our manual and motorized translating mounting platforms are ideal for use in microscopy applications.

    Imperial Optical Breadboard Size Options
    Width Length Honeycomb Stainless Steel Solid Aluminuma Acrylic, Transparent
    Nexus
    (60 mm Thick)b
    Nexus
    (110 mm Thick)b
    Intrinsically Damped
    (58 mm Thick)
    Aluminum
    (25 mm Thick)
    Aluminum
    (55 mm Thick)
    Standard Double Density High Density
    • Solid aluminum breadboards are offered with four different thicknesses: 0.5" (item # prefix MB), 0.75" (item # prefix MBH), 3/8" (item # prefix MS), or 0.28" (item # prefix MS). Select sizes are also available in hard-coat anodized aluminum (item #s CMMP1818 and CMMP2424) or without an anodized coating (item #s ending with U).
    • Item Number Suffix:
      • F, A, B, or G: Non-Sealed Mounting Holes
      • T, L, U, or N: Sealed Mounting Holes
      • FN or AN: Nonmagnetic Mounting Holes
      • Y or Z: No Mounting Holes
      • S: Stainless Steel
    • Tapped Hole Pattern Aligned at 45°
    • Build-to-Order
    • Includes a T-Slot in Side Panels for Compatibility with 25 mm Rail Accessories
    • This product has an access aperture.

    Metric Optical Breadboard Size Options
    Width Length Honeycomb Stainless Steel Solid Aluminuma
    Nexus
    (60 mm
    Thick)b
    Nexus
    (110 mm
    Thick)b
    Intrinsically Damped
    (58 mm Thick)
    Aluminum
    (25 mm Thick)
    Aluminum
    (55 mm Thick)
    Standard Double Density High Density
    50 mm 75 mm - - - - - - - - MSB5075/M
    75 mm 100 mm - - - - - - - - MSB7510/M
    75 mm 150 mm - - - - - - - - MSB7515/M
    100 mm 100 mm - - - - - MB10S/M - - -
    100 mm 150 mm - - - - - MB1015S/M MB1015/M
    MB1015U/M
    M45B1015/Mc MSB1015/M
    100 mm 300 mm - - - - - - MB1030/M - -
    100 mm 600 mm - - - - - - - MB1060/M -
    100 mm 900 mm - - - - - - - MB1090/M -
    Ø149 mm - - - - - - - MBR150U/M -
    Ø150 mm - - - - - - - MBR150/M -
    150 mm 150 mm - - - - - MB15S/M MB1515/M
    MB1515U/M
    M45B1515/Mc MSB15/M
    150 mm 300 mm - - - - - - MB1530F/M MB1530/M
    M45B1530/Mc
    -
    150 mm 450 mm - - - - - - MB1545/M - -
    150 mm 600 mm - - - - - - MB1560/M - -
    150 mm 900 mm - - - - - - MB1590/M - -
    150 mm 1200 mm - - - - - - MB15120/M - -
    180 mm 230 mm - - - - - - - - MSB1823/M
    MSBU1823/M
    200 mm 200 mm - - - - - - MB2020/M
    MB2020U/M
    - -
    200 mm 250 mm - - - - - - MB2025/M - -
    200 mm 600 mm - - - - - - - MB2060/M -
    200 mm 900 mm - - - - - - - MB2090/M -
    250 mm 300 mm - - - - - - MB2530/M
    MB2530U/M
    - -
    Ø300 mm - - - - - - - MBR300/M
    MBR300U/M
    -
    300 mm 300 mm B3030Ad
    B3030Ld
    - - PBG51501d
    PBG3030Ae
    - - MB3030/M
    MB3030U/M
    MB3030D/M MS12B/M
    MSB30/M
    300 mm 450 mm B3045Ad
    B3045Ld
    - B3045AX PBG3045Ae
    PBG51523
    - - MB3045/M
    MB3045A/Mf
    MB3045U/M
    - MSB3045/M
    300 mm 600 mm B3060Ad
    B3060L
    - B3060AXd PBG51502d
    PBG3060A
    PBG52502d - MB3060/M
    MB3060U/M
    - -
    300 mm 900 mm B3090Ad
    B3090Ld
    - - PBG3090Ae PBG52503d - MB3090/M - -
    300 mm 1200 mm - - - - - - MB30120/M - -
    350 mm 1150 mm - - - - - - MB35115/M - -
    350 mm 1425 mm - - - - - - MB35142/M - -
    450 mm 450 mm B4545Ad
    B4545Ld
    - - PBG4545A
    PBG51524
    - - MB4545/M - -
    450 mm 600 mm B4560Ad
    B4560Ld
    - B4560AXd PBG4560Ae PBG52522d - MB4560/M
    MB4560A/Mf
    MB4560U/M
    - -
    450 mm 750 mm - - - - - - MB4575/M - -
    450 mm 900 mm - - - - - - MB4590/M - -
    600 mm 600 mm B6060Ad
    B6060L
    - B6060AXd PBG6060Ae PBG52505d - MB6060/M -
    600 mm 900 mm B6090A
    B6090L
    B6090ANd
    B6090Z
    B6090Bd
    B6090Nd
    B6090AX PBG6090Ae PBG52506d - MB6090/M - -
    600 mm 1200 mm B60120A
    B60120L
    B60120Bd
    B60120Nd
    B60120AX PBG60120Ae - - MB60120/M - -
    600 mm 1500 mm - B60150Bd
    B60150Nd
    - - PBG52508d - - - -
    750 mm 750 mm B7575A
    B7575L
    - - PBG51509 - - MB7575/M - -
    750 mm 900 mm B7590A
    B7590L
    B7590ANd
    B7590Z
    B7590Bd
    B7590Nd
    B7590AX PBG7590Ae PBG52510d - - - -
    750 mm 1200 mm B75120A
    B75120L
    B75120ANd
    B75120Z
    B75120B
    B75120Nd
    B75120AX PBG75120Ae PBG52511 - - - -
    750 mm 1500 mm - B75150B
    B75150N
    B75150AX - - - - - -
    900 mm 900 mm B9090A
    B9090L
    B9090Bd
    B9090Nd
    - - - - - - -
    900 mm 1200 mm B90120A
    B90120L
    B90120AN
    B90120Z
    B90120B
    B90120N
    B90120AX PBG90120Ae PBG52513 - - - -
    900 mm 1500 mm - B90150B
    B90150N
    B90150AX PBG51514 PBG52514 - - - -
    900 mm 1800 mm - B90180B
    B90180N
    B90180AX - - - - - -
    1200 mm 1500 mm - B120150Bd
    B120150Nd
    - - - - - - -
    1200 mm 1800 mm - B120180B
    B120180Nd
    - - - - - - -
    1250 mm 1800 mm - - - - PBG52521 - - - -
    • Solid aluminum breadboards are offered with four different thicknesses: 12.7 mm (item # prefix MB), 19.05 mm (item # prefix MBH), 9.5 mm (item # prefix MS), or 7.0 mm (item # prefix MS). Select sizes are also available without an anodized coating (item #s ending with U).
    • Item Number Suffix:
      • F, A, B, or G: Non-Sealed Mounting Holes
      • T, L, U, or N: Sealed Mounting Holes
      • FN or AN: Nonmagnetic Mounting Holes
      • Y or Z: No Mounting Holes
      • S: Stainless Steel
    • Tapped Hole Pattern Aligned at 45°
    • Build-to-Order
    • Includes a T-Slot in Side Panels for Compatibility with 25 mm Rail Accessories
    • This product has an access aperture.
    Based on your currency / country selection, your order will ship from Newton, New Jersey  
    +1 Qty Docs Part Number - Imperial Price Available
    CMMP1818 Support Documentation
    CMMP1818Fixture Plate for CMM Metrology, 18" x 18" x 1/2", 1/4"-20 Tapped Mounting Holes
    $883.01
    Today
    CMMP2424 Support Documentation
    CMMP2424Fixture Plate for CMM Metrology, 24" x 24" x 1/2", 1/4"-20 Tapped Mounting Holes
    $1,162.19
    Lead Time
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