# How to calculate cutting costs

Me again

Does the Wazer always use the same amount of abrasive, no matter what it is cutting? Does it just vary it’s speed of cut, depending on material?

So a ten minute cut uses X amount of abrasive, a twenty minute cut would use twice as much? Is it that straight forward?

Thanks again, you can re-name me Dawn The Pain if you wish

Dawn

You are on the right track! The abrasive system lets out an average of 140 grams per minute. You can measure the abrasive flow-rate of your system at any time by following these instructions! The flow-rate should remain constant, as long as it is within the ideal range of 130-150 g/min. If required, a larger or smaller abrasive orifice can be installed in the hopper to hit that ideal flow-rate. The spares are located in the black tool kit!

When cutting different materials or different thicknesses, the only variable that changes is time. Generally, if the material is thicker or more dense, it will take more time to pierce and need to move slower in order for the cut to be clean.

As a quick rule of thumb, you can likely rely on the 10 minutes = x and 20 minutes = 2x, but there are a lot of other variables such as how many pierces are there, size/length of the pathing, etc. To help with these cut time and abrasive usage estimates, the WAM software will share a look into these during the final step of WAM!

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The time and abrasive use estimate are a great start but are there rules of thumb for maintenance cost that could be factored into a cut cost? Is there a \$/minute estimate that accounts for the consumables, pump rebuild, etc.

Hello @dbrub2 Thanks for joining the Forum - and welcome!

There are a lot of different ways to go about estimating operating costs. This is largely due to the cost of abrasive (buying in bulk vs buying in smaller quantities). We have estimated the operating costs for the following best case scenario and worst case scenario

• Best Case Scenario: \$0.16 / minute (with Abrasive Pallet - 2,200lbs, 1 cutting head kit, and a 3 pack cut bed)
• Worse Case Scenario: \$0.51 / minute (with Abrasive Bucket - 55lbs, 1 cutting head kit, and a single cut bed)

As for the costs regarding the pump rebuild, this is something that varies depending on Warranty, pump box condition, run time, etc. Best case scenario is that the pump can be replaced under warranty, with worst case scenario being the end user paying for a replacement pump box hardware (refurbished like new condition) and shipping costs.

Alex, it says right in your manual you should have the pump box rebuilt by Wazer every 500 hours of run time.

I’m closing in on 170 hours of run time, and I do believe that is the question dbrub2 was asking.

Assuming I follow the directions outlined, I would be shipping you the pump-box in about 300 hours. No clue how much that costs…

If we knew that cost, we could factor that into the run costs.

Just curious - where do you see the 500 hours run time for pump rebuild? There may be a mistake in the user manual.

The most up-to-date user manual should show the following (Page 114):

Shipping costs for a pump box change due to a lot of variables - seasonal shipping demands, distance traveled, weight of shipment, carrier, round-trip vs one way, etc. Due to so many uncontrollable factors, it is not possible to give an accurate estimation on shipping cost until the time comes and the process is determined.

I apologize for not giving a direct answer for pump rebuild (should be re-named pump replacement) costs. It is something that cannot be accurately provided or generalized - everyone’s shipping costs will be different.

As a quick pump replacement process review, it looks like the following:

1. Determine replacement & shipping costs
2. Fulfill order
3. Ship replacement
4. Swap original with replacement
5. Pack original in shipping materials that the replacement arrived in
6. Return original to WAZER

You’re probably right about the pump box @ 1000 hours, I was responding from memory, and have been wondering for a while the costs.

I would assume it’s a rebuild there is a huge motor in there that probably is no where near worn out of 1000 hours.

Can’t speak for the high pressure side.

Gosh I hadn’t even seen this in the manual…, I am based in the UK, not sure I’ll be shipping anything back

Many other waterjet manuf provide pump rebuild kits. Cant be too hard to swap a pump unit in the pump box!!