Rocna Anchors Dimensions

To ensure that your new Rocna or Vulcan anchor will fit well on your boat’s bow, we offer a number of resources to assist you.

Basic Dimensions

Commonly requested measurements are tabulated below for anchors up to 110 kg (243 lb) at the orientation pictured. Using these drawings and a tape measure, boaters can easily determine that a Rocna or Vulcan will fit their boat.

Full Scale Patterns

A 2D side-profile of any size anchor may be produced by using the full scale printable patterns available from Rocna.com. You can assemble and use these patterns to evaluate a fit to a higher degree of confidence.

3D or 2D CAD Files

We may supply naval architects or boat builders with accurate CAD files of Rocna and Vulcan models to support the proper integration of the anchor into a vessel’s anchoring system. Please contact us.

ROCNA Mk II DIMENSIONS

Rocna MKII Dimensions

SIZEABCDEFSRWidth
kglbmminmminmminmminmminmminmminmminmmin
4952920.836514.41526.01325.2993.9933.7662.61325.227110.7
61360623.941816.51746.91515.91144.51074.2753.01515.931012.2
92069427.347918.91997.81726.81305.11224.8863.41736.835514.0
122776330.152720.82198.61907.51435.61355.3953.71907.539015.4
153382232.456822.42369.32048.01546.11455.71024.02058.142116.6
204490535.662524.626010.22258.91706.71606.31124.42268.946318.2
255597538.467326.528011.02429.51837.21726.81214.82439.649919.6
3373106942.173829.130712.126610.52007.91897.41335.226710.554721.5
4088114044.978731.032812.928411.22148.42017.91415.628411.258323.0
50110122848.484833.435313.930512.02309.12178.51526.030612.162824.7
60132130551.490135.537514.832512.82459.62309.11626.432512.866826.3
80176143756.699239.141316.235714.126910.625410.01787.035814.173528.9
100220154860.9106942.144517.538515.129011.427310.81927.638615.279231.2
>100see below
For dimensions and fit support for models Rocna Mk II 135 (298 lb) and larger, please contact us.

Rocna Original Dimensions

Rocna Original Dimensions

SIZEABCCEFSRWidth
kglbmminmminmminmminmminmminmminmminmmin
4854721.538815.31546.11335.2963.81034.1753.0119.44.727510.8
61363024.844017.31706.71505.91024.01234.8803.1139.35.531512.4
102272428.551620.32048.01746.91305.11335.2903.5163.46.436514.4
153383032.759523.42359.32058.11455.71566.11003.9187.47.441516.3
204486434.061724.32449.62208.71626.41586.21104.3190.97.543517.1
255597138.269527.427510.82339.21756.91847.21154.5210.28.348519.1
3372106642.076530.128011.025410.01807.12068.11204.7230.69.153220.9
4088114245.082032.330011.827810.91887.42248.81305.1250.79.957022.4
55121123548.688334.832312.730612.02258.92268.91505.9264.410.462024.4
70154133852.796137.835413.933013.02409.42509.81556.1287.711.367026.4
110242149058.7106541.939015.435213.926510.428611.31807.132112.674529.3
>110see below
For dimensions and fit support for models Rocna Original 150 (331 lb) and larger, please contact us.

Vulcan Dimensions

Vulcan Dimensions

SIZE     A     B     C     D     E     S     Width     
kglbmminmminmminmminmminmminmmin
4944717.61054.11676.6903.5973.8672.625910.2
61351220.21204.71917.51034.11014.0773.029611.6
92058623.11385.42198.61184.61275.0883.533913.3
122764625.41526.02409.41305.11405.5973.837314.7
153369627.41646.525910.21405.51515.91044.140215.8
204476630.21807.128511.21556.11656.51154.544217.4
255582432.41947.630712.11666.51797.01244.947718.8
337390535.62138.433713.31827.21967.71365.352320.6
408896438.02278.935914.11947.62098.21455.755721.9
55121107342.22529.939915.72158.52339.21616.362024.4

Vulcan Shank Hole Dimensions

PIDL, mmW, mmT, mm
VLC4GS, VLC4SS26.49.28.9
VLC6GS, VLC6SS30.310.610.2
VLC9GS, VLC9SS34.612.211.7
VLC12GS, VLC12SS38.113.412.9
VLC15GS, VLC15SS41.114.413.9
VLC20GS, VLC20SS45.215.815.3
VLC25GS, VLC25SS48.71716.4
VLC33GS, VLC33SS53.418.818
VLC40GS, VLC40SS56.92019.2
VLC55GS, VLC55SS63.322.221.4
Shank Hole Rocna Anchors

Full Scale Patterns

A 2D side-profile of any size anchor may be produced by using the below full scale patterns. The pattern may be printed on any standard printer on A4 or letter paper, then assembled to form a full scale mockup. You may use these patterns to evaluate a fit that may be more difficult to determine just from the basic dimensions above.

For larger sizes, please contact us.

Rocna Mk II Patterns
Rocna Original Patterns
Title
Rocna Original Pattern August 15, 2023
Rocna Original Pattern August 15, 2023
Rocna Original Pattern August 15, 2023
Rocna Original Pattern August 15, 2023
Rocna Original Pattern August 15, 2023
Rocna Original Pattern August 15, 2023
Rocna Original Pattern August 15, 2023
Rocna Original Pattern August 15, 2023
Rocna Original Pattern August 15, 2023
Rocna Original Pattern August 15, 2023
Rocna Original Pattern August 15, 2023
Rocna Original Pattern August 15, 2023
Rocna Original Pattern August 15, 2023
Rocna Original Pattern August 15, 2023
    Vulcan Patterns
    Title
    Vulcan Pattern August 15, 2023
    Vulcan Pattern August 15, 2023
    Vulcan Pattern August 15, 2023
    Vulcan Pattern August 15, 2023
    Vulcan Pattern August 15, 2023
    Vulcan Pattern August 15, 2023
    Vulcan Pattern August 15, 2023
    Vulcan Pattern August 15, 2023
    Vulcan Pattern August 15, 2023
    Vulcan Pattern August 15, 2023
      3D or 2D CAD Files
      We are able to supply naval architects or boat builders with accurate CAD files of all Rocna and Vulcan models to support the proper integration of the anchor into a boat’s ground tackle system.

      Contact us, and with the execution of a simple terms of use agreement these CAD files may be made available.

      Anchor Angle

      The above dimensions will vary as the anchor is rotated.

      Will a Rocna or Vulcan Self-launch?

      All Rocna anchors have shank shapes that are designed to self-launch and encourage self-righting on retrieval, ensuring ease of use for all boaters.

      Which Rocna Type Will Fit Best?

      Rocna anchors are intended to fit well on most vessels. The Rocna Mk II offers improved clearance vs the Rocna Original at the shank-end and the roll-bar. The Vulcan is specifically designed to fit a wider range of vessels with the omission of a roll-bar to clear anchor platforms, bowsprits, or prods.

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