Mantus M1 Anchor

Mantus M1 Anchor

The best setting and holding boat anchor you can buy!

DIGS LIKE NO OTHER

The Mantus Anchor is designed to penetrate dense, grassy bottoms and set with unparalleled holding power. When tested, our anchors set faster and deeper than any other tested anchor, including Rocna, Manson Supreme, Bulwagga, Fortress, Bruce, CQR and Danforth anchors.

EASY TO STORE

The Mantus Marine anchor lineup simply has the best boat anchors available, whether you are a long-range cruiser, racing, or going out for a day sail. The Mantus quick-set anchor is stowable and breaks down for easy storage, so you can store one or two as spares without needing to take up much boat space.

BUILT STRONG

  • Formed out of high-quality steel plate. Contains no cast parts.
  • Shank and shank boot are welded from top and bottom.
  • Shank and roll bar are bolted to the fluke.
  • ASTM certified steel bolts are oversized with a large margin to ensure safety.
  • Although the shank is attached to the fluke with 4 bolts, a single bolt has sufficient strength to handle the maximum expected load on the anchor.
  • Stainless Steel anchors feature a 2205 Duplex shank and 316L stainless steel fluke. The surface is hardened by shot-peening and are then electro-polished to provide maximum corrosion resistance.
  • In the carbon steel version, every part of the anchor system is hot-dip galvanized for corrosion protection. (All shanks are HT ASTM 514 Steel and flukes are mild steel A36 equivalent)
  • Sharp-headed nose is precision machined to achieve the perfect chisel shape to achieve maximum penetrating power.

LIFETIME WARRANTY

Mantus Marine offers a lifetime warranty on its anchors (See below for details)

WHICH IS BEST? THE M1 OR THE M2?

After the release of the Mantus M2 Model, we often get the question: which one is better?  Both Anchors have an amazing setting and resetting ability and both are excellent choices for a primary anchor, but each has its own small specific advantages.  Both anchors roll over well in most bottom conditions and it is rare for a properly weighted anchor to end up upside down. Nevertheless, M1 Anchor, due to its roll bar, is better at rolling over in a really soft, silty bottom. The M2 Anchor is less likely to get plugged up with muddy weeds, and without the need for the roll bar, M2 is less bulky. Thus, the M2 model provides a better fit for boats with bow pulpits with slotted anchor housing and bow sprits.

SEE THE TESTS AND DECIDE FOR YOURSELF!

Click here to see a variety of independent tests and our own testing.

M1 Dimensions and Fit

M1 Anchor Dimensions

Mantus Anchor Templates

M1 Mantus Dimensions (Imperial) Inches

 
A
B
C
D
E
F
G
H
I
J
2.5lbs1710.211.84.03.20.80.39.36.14.1
8lbs2213.015.15.14.11.00.411.97.95.3
13lbs2615.918.46.25.01.20.414.59.66.5
17lbs2917.520.46.95.51.30.516.010.67.1
25lbs3119.022.07.45.91.50.517.311.47.7
35lbs3521.124.58.36.61.60.619.312.78.6
45lbs3923.727.59.37.41.80.721.614.39.6
55lbs4225.429.410.07.91.90.723.215.310.3
65lbs4527.031.410.68.42.10.724.716.311.0
85lbs4728.733.311.39.02.20.826.217.311.7
105lbs5131.136.012.29.72.40.928.318.712.6
125lbs5533.438.813.110.42.60.930.520.113.6
155lbs6337.944.014.911.82.91.034.622.915.4
175lbs6740.547.015.912.73.11.137.024.416.5

M1 Mantus Dimensions (Metric) mm

 
A
B
C
D
E
F
G
H
I
J
1.1kg42725930010281207236156105
3.6kg546331384130103259302200135
5.9kg6664034681581263111368243164
7.7kg7354465171751393412407269181
11.4kg7954825591891503713440290196
15.9kg8845366222101674115489323218
20.5kg9936026992361884617550363245
25.0kg10636447472532014918588388262
29.5kg11326877962692145319627414279
38.6kg12027298452862275620665439296
47.7kg130117899153092466122720475321
56.8kg14018499853332656523775512345
70.5kg158996411183783017426879581392
79.5kg1699103011944043217928940621419

Anchor Sizing

Mantus Anchor Sizing

M1 Anchors

M1 Anchor Size (Metric)Lunch anchor for winds < 30 knotsCruising anchor for winds < 50 knotsStorm anchor for winds > 50 knotsBlade Surface Area (cm sq)
1 kg0-5 m
< 460 kg
160
3.5 kg5-6 m
< 1,300 kg
0-5 m
< 460 kg
0-3.6 m
< 360 kg
380
6 kg6-7.5 m
< 2,300 kg
5-6 m
< 1,400 kg
3.6-5 m
< 460 kg
570
8 kg7.5-9 m
< 5,000 kg
6-7.5 m
< 2,300 kg
5-6 m
< 1,400 kg
680
11.4 kg9-10.6 m
< 6.800 kg
7.5-9 m
< 5,000 kg
6-7.5 m
< 2,300 kg
800
15 kg10.6-12 m
< 9,090 kg
9-10.6 m
< 6,800 kg
7.5-9 m
< 5,000 kg
1,000
20 kg12-13 m
< 13,600 kg
10.6-12 m
< 9,090 kg
9-10.6 m
< 6,800 kg
1,260
25 kg13-13.5 m
< 23,000 kg
12-13 m
< 13,600 kg
10.6-12 m
< 9,090 kg
1,400
30 kg13.5-15.2 m
< 23,000 kg
13-13.5 m
< 18,200 kg
12-13 m
< 13,600 kg
1,640
39 kg15.2-18.2 m
< 27,000 kg
13.5-15.2 m
< 23,000 kg
13-13.5 m
< 18,200 kg
1,840
48 kg18.2-21.2 m
< 32,000 kg
15.2-21.2 m
< 27,000 kg
13.5-15.2 m
< 23,000 kg
2,160
57 kg21.2-24.2 m
< 45,500 kg
18.2-21.2 m
< 32,500 kg
15.2-18.2 m
< 23,000 kg
2,500
70 kg24.2-27.3 m
< 50,000 kg
21.2-24.2 m
< 45,500 kg
18.2-21.2 m
< 32,500 kg
3,190
80 kg27.3-30.3 m
< 59,000 kg
24.2-27.3 m
< 50,000 kg
21.2-24.2 m
< 45,500 kg
3,641

M1 Anchor Size (Imperial)Lunch anchor for winds < 30 knotsCruising anchor for winds < 50 knotsStorm anchor for winds > 50 knotsBlade Surface Area
(inches sq)
2.5 lbs0-16 ft
< 1,000 lbs
25
8 lbs16-20 ft
< 3,000 lbs
0-16 ft
< 1,000 lbs
0-12 ft
< 800 lbs
56
13 lbs20-25 ft
< 5,000 lbs
16-20 ft
< 3,000 lbs
12-16 ft
< 1,000 lbs
88
17 lbs25-30 ft
< 11,000 lbs
20-25 ft
< 5,000 lbs
16-20 ft
< 3,000 lbs
105
25 lbs30-35 ft
< 15,000 lbs
25-30 ft
< 11,000 lbs
20-25 ft
< 5,000 lbs
124
35 lbs35-39 ft
< 20,000 lbs
30-35 ft
< 15,000 lbs
25-30 ft
< 11,0000 lbs
155
45 lbs39-43 ft
< 30,000 lbs
35-39 ft
< 20,000 lbs
30-35 ft
< 15,000 lbs
195
55 lbs43-45 ft
< 50,000 lbs
39-43 ft
< 30,000 lbs
35-39 ft
< 20,000 lbs
217
65 lbs45-50 ft
< 50,000 lbs
43-45 ft
< 40,000 lbs
39-43 ft
< 30,000 lbs
254
85 lbs50-60 ft
< 60,000 lbs
45-50 ft
< 50,000 lbs
43-45 ft
< 40,000 lbs
285
105 lbs60-70 ft
< 70,000 lbs
50-60 ft
< 60,000 lbs
45-50 ft
< 50,000 lbs
335
125 lbs70-80 ft
< 100,000 lbs
60-70 ft
< 70,000 lbs
50-60 ft
< 60,000 lbs
387
155 lbs80-90 ft
< 110,000 lbs
70-80 ft
< 100,000 lbs
60-70 ft
< 70,000 lbs
494
175 lbs90-100 ft
< 130,000 lbs
80-90 ft
< 110,000 lbs
70-80 ft
< 100,000 lbs
564

Anchor Sizing Guide

When making sizing recommendations for a working anchor we are generally referring to the needs of a cruising boat spending most of its time on anchor.

In doing so we try to envelope high sustained winds (50 kts) and assume poor holding conditions (low viscosity bottoms).

Some may think these recommendations to be too conservative especially when compared to sizing tables from other manufacturers.

However, companies often make claims of superior anchor efficiency, stating that their small anchor X will outperform a much heavier anchor from their competitors and often use sizing charts as a marketing tool to that end – even recommending anchors and anchor systems that are dangerously undersized for their intended use.

Comparing surface area can be a good judge for potential holding capability.

Our anchor sizing recommendations are presented in the table below and divided in three categories:

  • Lunch Anchor category is recommended for lighter use, expected winds under 30 knots
  • Working anchor for winds under 50 knots
  • Storm anchor recommendations are intended for winds above 50 knots.

These recommendations are all made assuming the worst-case scenario, a poor holding bottom and therefore may seem conservative but we believe are accurate.

M1 Anchor Assembly Details

Bolts, Washers and Nuts are provided with every Mantus Anchor.

In the event of replacing a lost fastener, please make sure to always use proper size.

Always use locking washers, or nylon lock nuts, and tighten the nut securely.

M1 Assembly Guide

M1 Anchor Assembly

Click here for an unboxing and assembly video guide of the M1 anchor.

Warranty and Returns Policy

Tempest Trimarans Ltd stands by the Mantus lifetime warranty on all of its products and components against damage and manufacturing defects.

This is a genuine LIFETIME guarantee and if you are dissatisfied with any Mantus product at any time we will give you a replacement or refund.

With the anchors we will give you a replacement part – for example a roll-bar, fluke or shank.

Exceptions

  • We will not normally replace the bridle line which will slowly degrade in normal use as would any other bridle line
  • The galvanised coating on the anchor carries a 3 year warranty

In the first instance please contact us via [email protected] explaining the problem and giving your contact details and we will get in touch to resolve it with you.

Contact us

[email protected]

or call

+44 (0)7863 403462

or chat with us now bottom right!

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