DMM 4 Cam Units - Anodized

DMM 4 Cam Units - Anodized is rated 4.75 out of 5 by 8.
  • 2016-07-23T09:20CST
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Product Description Item No.   10110480

The 4 Cam Unit Set by DMM. The DMM 4CU's light weight is a noticeable advantage when packing in or climbing with a full rack. The way we see it, an average 20% weight saving means that the climber can "sew up cracks" with a much lighter rack. Another way of looking at it is that climbers can place 20% more cams, feel much more secure, and still come out even on the weight. Less weight with more protection ... who wouldn't love that?

Each cam is rated to 14 kN in the active, working position with the quick release sling doubled, and 12 kN with sling fully extended. The passive strength of the cams, resting on their stops, is 10kN.

The cam lobes are cut to a 13.75 spiral. This has proven to be the best angle for balancing a cam's range and holding power. Our cam lobes are anodized for easy, size identification on the rack. After all, time is of the essence when you're on a pumpy route.

The "free-floating" axle is peened, not soldered to the cable terminations, to allow them to rotate as necessary at the moment point of impact. This reduces stress and helps to avoid a sheering torque on the axle. This effect is especially obvious if you imagine placement in a diagonal crack, although it will happen in almost any type of placement. In a diagonal the cables sides take uneven pressure and will rotate in opposite directions from one another. On point of impact, the torque on the axle is minimized by our peened construction.

The trigger bar is able to slide on the trigger wires to reduce wear and tear on the wires. If a camming unit is placed in a flared crack, the cam lobes are commonly set with one pair of cam lobes tight and the other pair loose. The trigger wires on the tighter pair's side are able to slide through the trigger bar, instead of getting wadded up, crimped and frayed, as on other brands' units. Occasionally, a placement causes the trigger bar of a unit to rub against the side of the crack. Here again, this is a time when your DMM 4CU trigger bar can slide up the wire, avoiding the crumpling effect that happens to triggers that are stationery on other brands' wires. One more example of this anti-wadding effect is when a rack is crammed into a backpack, the trigger wires on DMM cams do not get as compressed and tweaked, because of our well thought out, yet simple design.

What are the two empty holes in the trigger bar? They are there for the crack connoisseur who wishes to sling 2 mm cord in a U-shape configuration, echoing the U-shaped cable construction. This serves as a retractor cord for cams that have been placed too deeply into a crack.

DMM 4CU's come in 11 sizes, fitting from 0.5 inch to 4 inch cracks (13 mm-100 mm). Our size designations approximate the corresponding crack size in inches. We have two sizes that are unique to the DMM and Wild Country ranges, 1.25 and 1.75. These fit in between the more common 1, 1.5 and 2 inch units and cover those otherwise sketchy, off-fingers and narrow hands sizes.

Our 4CU's have an amazing range of features that make them quick, light and easy to use. They're light, strong, secure, durable and quickly identifiable for size.

Colour coded Spectre and Phantom carabiners are available so that you can rack your cams in an easily identifiable manner.

SPECIFICATIONS of the 4 Cam Unit Set by DMM


  • Weight: 75g
  • Strength: 12-14kN
  • Range: 13-19mm
  • Passive Strength: 10 kN
  • Weight: 80g
  • Strength: 12-14kN
  • Range: 17-24mm
  • Passive Strength: 10 kN
  • Weight: 93g
  • Strength: 12-14kN
  • Range: 19-29mm
  • Passive Strength: 10 kN
  • Weight: 96g
  • Strength: 12-14kN
  • Range: 21-33mm
  • Passive Strength: 10 kN
  • Weight: 97g
  • Strength: 12-14kN
  • Range: 23-35mm
  • Passive Strength: 10 kN
  • Weight: 99g
  • Strength: 12-14kN
  • Range: 25-41mm
  • Passive Strength: 10 kN
  • Weight: 110g
  • Strength: 12-14kN
  • Range: 29-44mm
  • Passive Strength: 10 kN
  • Weight: 123g
  • Strength: 12-14kN
  • Range: 33-55mm
  • Passive Strength: 10 kN
  • Weight: 151g
  • Strength: 12-14kN
  • Range: 43-66mm
  • Passive Strength: 10 kN
  • Weight: 185g
  • Strength: 12-14kN
  • Range: 51-82mm
  • Passive Strength: 10 kN
  • Weight: 224g
  • Strength: 12-14kN
  • Range: 64-100mm
  • Passive Strength: 10 kN

- + Product Specifications
Disclaimer: All climbing equipment is final sale. Sorry to be so mean about it.
Best Use: Big Wall Climbing
- +
Rated 4 out of 5 by from Great in the Middle sizes First off, these are REALLY well built, finish is impeccable, and the free floating connection between the wires and axel makes these really bombproof. Doubled slings save even more weight than the design does. Good value too.,,,,These cams are best is in the middle range (sizes 1 to 3). Very much lighter than most designs, even more so without a quickdraw. U stem means that while one gets the benefit of 4 cams, the head width is narrow.,,1.25 and 1.75 make great doubles for Camalots and DMM Dragons.,,,,The large sizes (3.5,4) aren't lighter than Tech Friends and don't seem as secure as the head is narrower. The small (0, 0.5) sizes really aren't great from the headwidth and bulk of the axel.
Date published: 2010-10-30
Rated 5 out of 5 by from These cams are great! Picked up a couple of these to double up on my Black Diamond .5 and .75, and I have to tell you I reach for them first now. The doubled up dyneema sling is great to extend instead of having to use a quickdraw, however if the piece would require a shoulder length sling anyways then you are still going to need one which is no big deal of course. I would hesitate to pick up more of these, especially at 25% off!
Date published: 2013-08-28
Rated 4 out of 5 by from Light weight and Stable I got these to fill in the large range above my TCU's, but also have BD 4's. Sometimes these just seems to be more stable in certain cracks. The aluminium seems to get more "bite" on certain placement against the C4's. They also have strong springs, which really lock it into a crack.,,,,They are great light cam, and should be looked as a good option to fill out a rack. I wasn't disappointed in these.
Date published: 2011-12-17
Rated 5 out of 5 by from Very strong This cams feel very strong and secure on the rocks. For me these are better than the TCU because the sling is longer and it feels stronger. I can put 3 more on top of this one while climbing but this is the one i always count on not ripping off when i fall. Really love them.. Size one on this one is like a 3 on the TCU
Date published: 2012-06-24
Rated 5 out of 5 by from Great cams, recommend as doubles since the sizes are slightly different than bd c4s These cams where on sale, so I picked one up in the 1.25 size (roughly a bd c4 .4), it does not have quite the expansion range, but I love it all the same. Build quality looks great, action feels solid and the extendable sling is a plus. I will be buying more.
Date published: 2013-10-18
Rated 5 out of 5 by from awesome I like the dmm 4 units. They are totally light and feel very bomber when placed. The extendo really makes sense, seems like a total no-brainer, and comes in very handy.
Date published: 2013-08-24
Rated 5 out of 5 by from So easy to set I can always find a crack to set this camm. I rely on this protection all of the time. Great product. I would love about ten more of these.
Date published: 2011-11-27
Rated 5 out of 5 by from feel really good about placing these dmms there is just nothing like a camalot for me.
Date published: 2014-11-05
  • 2016-07-23T09:20CST
  • bvseo_cps, prod_bvrr, vn_cps_3.3.0
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_8
  • loc_en_US, sid_10110480, PRD, sort_relevancy
  • clientName_moosejaw

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