Do you mind if I ask? We are similar in the fact that almost everything we do is reoccurring production runs. Some of our machines have been running the same part for the last 10 years+. At our shop, depending on the level of machine complexity we charge a different rate. Meaning we charge probably $20.00 less per hour for a standard Haas ST-20 than we do for a much more expensive and complex Doosan TT-1800SY. If the Doosan is 3-4x the cost, logic would state you would need to charge more for it over the Haas. So I guess my question is, do you have different rates for different machines in your shop, and do you charge different rates (or profit margins) for different customers, depending on who they are?
I could see doing this, all our machines are similar, we don't have drastically different machines, but yes I would do this, I dont know about $20.00 per hr difference that is steep. But also you have to figure something else.
Some times as you increase in machine capability, complexity, and cost, you also increase in production efficiency. for instance if you bought a VMC that could make 3 of a part in a run in 30min. (10min. each)
compared to buying a VMC that was larger, faster, or had better more expensive, high density style work holding, and you could make this same part at 20 at a time at (5min. each) You now make far more money for your time.
if you charge the same rate, let alone if you increase the rate because the machine costs more.
But the truth is you can now afford to lower the price some and make more money in your time with the standard rate, and give the customer a price brake, increasing customers with your lower prices.
you are increasing your parts/time ratio, allowing you to do more work in a day. not increasing you pricing due to more expensive machines.
In truth some of the larger places that do outsource contracts on a long term bases insist on a price decrease over time, why? because they expect you to grow and buy more efficient machines, and with all technology, as the technology increases the cost of equivalent products reduces. So over time machines become more capable and cheaper at the same time, and they want to see this price reduction. yes they arent accounting for inflation, but you should account for more than that with the growth in your business.