Part Numbering System for Maxi-Bolt
Anchors, Undercutting Tools and Cutter Inserts

  • Maxi-Bolt Anchors
  • Maxi-Bolt Flush-Mount, Coupling Anchors
  • Threaded Rods
  • Maxi-Bolt Nuts
  • Maxi-Bolt Washers
  • Flush-Mount, Coupling Anchor Accessories
  • Undercutting Tools
  • Cutter Insert Blades for the Undercutting Tool



  • Maxi-Bolt Anchors

    Part numbers for Drillco Maxi-Bolts use one of the three following templates:

    For ASTM A193 Grade B7 anchors
    MB-Diameter Series-Overall Length-Sleeve Length
    For ASTM A36 anchors
    MBA36-Diameter Series-Overall Length-Sleeve Length
    or

    For all Stainless Steel Types
    SAMB-Diameter Series-Overall Length-Sleeve Length  Material Description

    Maxi-Bolts ordered under the SAMB designation must give a Material Description as there are four stainless types to choose from. See the materials specification page for details.
     

    Diameter Series

    The Diameter Series may be one of the following, depending on the anchor's stud bolt diameter:

    Diameter Series Anchor Stud
    Bolt Diameter
    250 1/4"
    375 3/8"
    500 1/2"
    625 5/8"
    750 3/4"
    1000 1"
    1250 1 1/4"

    Overall Length for A193 Grade B7 (High Strength Carbon Steel)

    The Overall Length is given in inches and should be in even inch increments over or under the standard reference lengths, given below, to accomodate the end marking system:
     
    Stud Bolt
    Diameter
    Diameter Series Reference
    Length
    1/4" 250 4 1/4"
    3/8" 375 6"
    1/2" 500 8 1/4"
    5/8" 625 10"
    3/4" 750 13 1/2"
    1" 1000 16 1/2"
    1-1/4" 1250 20"

    Thus a 1/2" anchor (500 Series) can have any of 6 1/4", 8 1/4", 11 1/4", etc. as an overall length.
     

    Overall Length for A36 (Mild Carbon Steel) and All Stainless Steel

    The overall length is given in inches. The overall length must be an integer (no fractions).


     

    Sleeve Length (All Materials)

    The Sleeve Length can be any number in increments of 1/4" - 5", 5 1/4", 5 1/2", 5 3/4", etc. The Sleeve Length may differ from the embedment depth of the anchor in concrete as, for example, when the sleeve is allowed to project through a hole in the attachment plate. (Type II Installation).
     

    Examples

     
    MB-750-14 1/2-9 1/4 A 3/4" A193 B7 Maxi-Bolt with 14 1/2" overall length and 9 1/4" sleeve length
    MBA36-500-7-4 A 1/2" A36 Maxi-Bolt with 7" overall length and 4" sleeve length with A36 bolting
    SAMB-1000-21-16 A304 Class 1 A 1" Maxi-Bolt with 21" overall length and 16" sleeve length with A304, Class 1 stainless bolting

    Maxi-Bolt Flush-Mount
    Coupling Anchors

    (Click here for Flush-Mount Anchor Accessories)

    Part numbers for Drillco Flush-Mount, Coupling Maxi-Bolts use one of the three following templates. Note that the Maxi-Bolt Anchors and Couplings (See Reference F in Figure 2 of the Flush-Mount Detailed Installation Procedure) must both be ordered as separate items:

    For ASTM A193 Grade B7 Flush-Mount, Coupling anchors
    FMB-Diameter Series-Overall Stud Length-Sleeve Length (Anchor Bolt)
    MBCP-Diameter Series (Coupling)

    For all Stainless Steel Type Flush-Mount, Coupling anchors
    SAFMB-Diameter Series-Overall Stud Length-Sleeve Length  Material Description (Anchor Bolt)
    SAMBCP-Diameter Series  Material Description (Coupling)

    Maxi-Bolts ordered under the SAFMB designation must give a Material Description as there are four stainless types to choose from. See the materials specification page for details.

    The coupler description should match the conical nut description.

    The following steps should be followed to determine the Diameter Series, Overall Stud Length and Sleeve Length numbers to fill into the above templates.


     

    Diameter Series

    The Diameter Series may be one of the following, depending on the anchor's stud bolt diameter:

    Diameter Series Anchor Stud
    Bolt Diameter
    375 3/8"
    500 1/2"
    625 5/8"
    750 3/4"
    1000 1"
    1250 1 1/4"

    Minimum Embedment Depths

    In order to accommodate the lengths of both the coupling and a minimum acceptable sleeve length, the anchor's embedded length must meet or exceed the following minimums. The Embedment Depth can be any number in increments of 1/4" - 5", 5 1/4", 5 1/2", 5 3/4", etc.

    Stud Bolt
    Diameter
    Diameter Series Minimum
    Embedment
    3/8" 375 3"
    1/2" 500 4"
    5/8" 625 4 1/2"
    3/4" 750 4 1/2"
    1" 1000 7"
    1-1/4" 1250 8 1/2"

    Overall Stud Length

    The Overall Stud Length is calculated as a function of the anchor's embedment. To determine the overall stud length subtract the appropriate number in the following table from the embedment depth. For example, a 1" Maxi-Bolt with a required embedment of 12 1/2" would have an overall length of 11 1/4" (12 1/2" required - 1 1/4" from the table):

    Stud Bolt
    Diameter
    Diameter Series Number to Subtract
    From Anchor Embedment
    3/8" 375 3/4"
    1/2" 500 1"
    5/8" 625 1"
    3/4" 750 1"
    1" 1000 1 1/4"
    1-1/4" 1250 2"

    Sleeve Length

    The Sleeve Length is also calculated as a function of anchor embedment depth. To determine the sleeve length subtract the appropriate number in the following table from the embedment depth. For example, the same 1" Maxi-Bolt cited above requiring a 12 1/2" embedment would have a sleeve length of 9 7/8" (12 1/2" required - 2 5/8" from the table:

    Stud Bolt
    Diameter
    Diameter Series Number to Subtract
    From Anchor Embedment
    3/8" 375 1 5/8"
    1/2" 500 2 1/8"
    5/8" 625 2 1/8"
    3/4" 750 2 1/8"
    1" 1000 2 5/8"
    1-1/4" 1250 4 1/8"

    Examples

    FMB-750-8 1/4-7 1/8
    and MBCP-750
    A 3/4" A193 B7 Maxi-Bolt Flush-Mount, Coupling Anchor with 9 1/4" embedded length
    SAFMB-1000-14 3/4-13 3/8 A304 Class 1
    and SAMBCP-1000 ASTM-A564 Condition H1150
    A 1" Flush-Mount, Coupling Maxi-Bolt with 16" embedded length made with A304, Class 1 stainless bolting. Notice the coupler description matches the conical nut description.



    Threaded Rods

    Threaded Rods are ordered by the inch and can be any length. Use one of the following three templates:

    For A193 Grade B7 threaded rods
    MBTR-Diameter Series-Length
    For A36 threaded rods
    MBTRA36-Diameter Series-Length
    or

    For all Stainless Steel Types
    SAMBTR-Diameter Series-Length-Material Description

    Maxi-Bolts ordered under the SAMBTR designation must be ordered with on of the following material descriptions:

    304 Class 1
    304 Class 2
    316 Class 1
    316 Class 2

    Please see the Materials Specification page if there are any questions.



    Maxi-Bolt Nuts

    Use the following template for ordering nuts:

    For use with A193 Grade B7 and A36 material
    MBN-Diameter Series
    For use with Stainless Steel material
    SAMBN-Diameter Series



    Maxi-Bolt Washers

    Use the following template for ordering washers:

    For use with A193 Grade B7 and A36 material
    MBW-Diameter Series
    For use with Stainless Steel material
    SAMBW-Diameter Series



    Accessories for Flush-Mount, Coupling Anchors

    There are four different accessories available for use with Flush-Mount, Coupling Anchors. All are designated by their Prefix followed by the Diameter Series as given in the tables above.

  • Setting Sleeves - Prefix MBCP-SS. See Figure 5 of the Flush-Mount Detailed Installation Procedure
  • Setting Rod (Stud Extender) - Prefix MBCP-SR. See Figure 5 of the Flush-Mount Detailed Installation Procedure
  • T-Handle Wrenches - Prefix MBCP-WR. Used to tighten the anchor's coupling nut.
  • Thread Protectors - Prefix TP. Plastic protectors to keep dirt and debris out of the coupling nut's threads when the anchorage is not in use.


  • Undercutting Tools

    Part numbers for Drillco Maxi-Bolt Undercutting Tools use one of the following templates:

    Fixed Depth: MBTA-Diameter Series-Undercutting Depth-WC (No WC for 1/4" and 3/8" tools)
    Variable Depth: MBTB-Diameter Series-Least Undercutting Depth-Greatest Undercutting Depth-WC (Option not available for 1/4" and 3/8" tools)
    WC indicates a water cooled tool.

    MBTA or MBTB Designation

    The MBTA designation is for a fixed undercutting tool. The MBTB designation denotes a variable tool.

    Diameter Series

    Although the diameter of the Undercutting Tool is physically larger than the diameter of the anchor's stud bolt, the same diameter series designations which are used with the anchor are used with the Undercutting Tool. This is true of all tools and accessories used with a particular diameter anchor. So, if you are installing 1/2" anchors, all tools and accessories used with 1/2" diameter anchors will share a 500 diameter series designation.

    Undercutting Depth-Least Undercutting Depth-Greatest Undercutting Depth

    Tools come with either one fixed Undercutting Depth or a range of undercutting depths, in 1/2" increments, between the Least Undercutting Depth and the Greatest Undercutting Depth.

    Examples

     
    MBTA-750-9 1/4-WC A 3/4" fixed depth, water cooled undercutting tool for undercutting at 9 1/4"
    MBTB-500-8 1/4-10 1/4-WC A 1/2" undercutting tool with undercutting depths between 8 1/4" and 10 /14" in 1/2" increments. The tool is also water cooled.

    Cutter Insert Blades for
    the Undercutting Tool

    Drillco Undercutting Tools come with replaceable cutter insert blades. This means that the body of the tool is long lived while the cutters wear and must be periodically replaced.

    Part numbers for the Cutter Insert Blades use one of the two following templates:

    MBI-Diameter Series
    MBID-Diameter Series Note: Not available for 250 (1/4") or 375 (3/8") Diameter Series.

    MBI or MBID Designation

    The MBI designation specifies carbide faced cutter blades while the MBID designation is reserved for cutter blades with diamond inserts. The choice of carbide or diamond cutter blades will depend on several factors such as the hardness of the concrete aggregate and whether or not rebar will be encountered. Contact a Drillco representative for guidance.

    Diameter Series

    As with the anchors and undercutting tools, use the diameter series chart to match the cutter insert to the underlying anchor diameter.



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