Weight Lifting Landmine

What is a Landmine?

A land mine is a piece of equipment that holds one end of the bar and can swivel in all directions that can allow for many different lifts to be done. One bar end goes into the holder of the landmine and the other end of the bar is loaded with weight plates. Things that you can do with this include rows, squats, pressing movements, curls, grip strength, and much more. It allows for every part of the body to be worked, while also maintaining minimum space requirements. The one designed takes up only 1.5 feet by 1.5 feet of floor space and is extremely easy to be moved or stored as well as using locally available items found at most home improvement stores like Lowes.

Target Audience

My target audience is individuals in the manufacturing of gym equipment. With a virus still lingering many people are opting to switch to home gyms and the biggest problems of home gyms are space requirements as well as cost. This shows how to keep cost and space requirements down while also making an effective piece of lifting equipment for people who may not own a rack or have the ability to get a gym membership.

Learning objectives

• Be able to source locally available products.
• Be able to combine locally sourced products into a finished item.
• Be able to modify products by hand to have those products fulfill a need.
• Understand manufacturing on a smaller scale.
• Understand versatility of a product to reduce cost for consumers on buying extra equipment.

STELS

Core Disciplinary Standards

• Standard 2: Core concepts of technology and engineering
  • This product, like all others, require resources. It requires multiple different materials, many tools and some time to be able to produce.
  • It also has criteria and constraints it has to follow. It needs to be as small as possible and be able to perform multiple different purposes.

Technology and Engineering Practices

• TEP-2 Creativity
  • This product is an example of using what is available and being able to understand the limits of what is possible with certain restraints and being able to work around them
  • It has also been designed off of a classic landmine attachment refined to allow a standalone base instead of requiring a full power rack, which most people will not own or have space for.

• TEP-3 Making and Doing
  • This is a core part of Technology and Engineering and is used in everything. For this projects application of this practice we are designing and creating a simple product

• TEP-4 Critical Thinking
  • Creating this product requires thoughtful decisions made to optimize this product. Even picking this product itself required critical thinking. There are other products that could have been made to teach this lesson, but the landmine is the one that applies most to the current times, its multi-functional and requires minimal space as well as being cost effective for most consumers. The product needs to be space saving and you have to make decisions on what size would be right for most people as well as still have the same function, because it needs to be as small as possible but still needs a large enough base plate to keep from sliding or lifting off the ground while it is in use.

Technology and Engineering Contexts

• TEC-2 Material Conversion and Processing
  • This project is mostly about taking materials and repurposing them into something we need. We are taking stock supplies from most locally found home improvement stores and creating a new purpose with them in the creation of a finished weightlifting product by means of modification to the original stock items.

Materials: (estimated cost $55)

• 8' - 2"*6" wooden board
• Caster wheel with 2 inch thick wheel
• 3' of 1.25"*1.25" angle iron
• Twelve Number 8 - 4" wood screws
• Four 2" lag screws with washers
• 2" inside diameter conduit nipple 8" long
• Two 2" conduit connectors

Tools: (Should already have these for manufacturing) (estimated cost $150)

• Tape measure
• Drill
• Drill press (optional but helpful for drilling through conduit)
• Vice (big enough to fit 2 inch conduit)
• Hacksaw
• Handsaw
• Chop saw (Optional but helpful for getting straight cuts on the 2*6)
• Screw driver attachment for drill
• Steel cutting drill bit (needs to fit the bolt that came on the caster wheel)
• Wood drill bit
• Socket Wrench with socket head set (one that fits the head of the lag screws and one that fits the bolt on the caster wheel)

To start simply undo the bolt that connects the wheel to the base and remove the wheel.

Save the bolt, nut and washer for later attachment by threading it back through the caster wheel base without the wheel on.

Set this aside for later and move on to building the holder for the barbell.

Next take the 2" conduit nipple and attach the conduit connectors to each end to cover the threads on the conduit nipple.

Again set this aside for later and move on to building the base.

Lock the 3' angle iron into a vice and mark in the center.

It should be 18" on each side.

cut through the angle iron with the hacksaw until you have two 18" pieces of angle iron.

Begin this step by marking, starting from the end, four 18" sections.

Cut the 2*6 at each marking with either a handsaw or a chopsaw.

You should be left with 4 18" pieces of 2*6.

Start by marking the angle iron 2.75" from each end and once in the center.

Then mark half an inch from the top (not where the angle iron is bent).

Lock the angle iron in the vice and drill through the markings.

Start with sandwiching three of the 18" beams between the pieces of the angle iron where the angle iron is on the side of the beams and wraps under the beams.

Align the two outer beams to the edge of the angle iron and the middle of the middle beam to the center of the angle iron. Attach the angle iron to the beams using a single wood screw on each side of each beam.

Mark the final 18" section of 2*6 with six holes for screws. The the end holes are 1" from the end of the board and 1" from each side. The two middle holes are centered 9" from the end of the board and 1" from each side.

Attach the final board perpendicularly to the other three boards. The ends of the final board are centered on the two outer beams.

Align the caster wheel to the exact center of the upper board. (there should be the same measurement on each parallel side)

Mark the upper board that was attached last four times using the caster wheel base as a guide.

Drill holes through the four marks. and attach the caster wheel base to the wood using the lag screws and a washer. (make sure the washer is place onto the lag screw before attaching the caster wheel base to the wooden board)

Take the conduit you attached earlier and mark half way (should be an inch) from the end of the conduit connecters.

Lock the conduit into a vice and drill, using the metal cutting drill bit, on your mark straight though to the other side of the conduit.

This can be done with a hand drill but a drill press will make sure the hole is perfectly aligned.

Take the drilling extremely slow. Do not force the drill into the metal let the drill bit do the work.

The proper amount of force can be seen by the shavings coming off of the metal. The metal shavings should be long curled and even. If there is smoke coming from the hole back the drill out and give the metal time to cool down.

With the hole now drilled through the conduit, align the holes of the caster wheel base to the holes that were drilled in the conduit.

Take the bolt that came with the caster wheel base, place the washer on the bolt and run the bolt through the aligned holes.

Thread the nut onto the bolt making sure it is loose enough to allow the conduit to move between the caster wheel base.

Finally you have your finished product.

Put one end of the bar into the bar holder that was made of conduit.

Add weights to the other end of the bar.

Lift the way you would with any other landmine attachment.