Check Fixture Costs - Simple check fixture (go/no go) that checks 3-4 points

P

patrick_1446

#1
Can anybody tell me what a reasonable price for a simple check fixture (go/no go) that checks 3-4 points around a part approximately 3"X4"X1"? I'm getting a cost back of close to $5000 which seems absolutely ridiculous to me. All I want to do is check perimeter and thickness in a couple places.
 
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T

True Position

#2
Re: Check Fixture costs

Can anybody tell me what a reasonable price for a simple check fixture (go/no go) that checks 3-4 points around a part approximately 3"X4"X1"? I'm getting a cost back of close to $5000 which seems absolutely ridiculous to me. All I want to do is check perimeter and thickness in a couple places.
Why does that price seem so ridiculous? How much time do you figure it would take? I could easily see a fixture like you're describing take 40+ hours to make(design, machine, assemble, test) and cost $1500+ in materials.

The devil is always in the details, can you post a picture of the part and the dimensions you are interested in having a fixture check?
 
D

DrM2u

#3
Re: Check Fixture costs

The price is a function of many variables:
- the accuracy you are specifying on your prints or requirements
- whether the gage needs to be certified or not by the supplier
- the design of the gage; intricate machining and grinding can get expensive
- the materials specified; high carbon steels are more expensive than low carbon
- the components specified; what type, how many, what brand, certifications, etc

What I am getting at is that I would not be able to estimate a price without seeing what the fixture look like. As a general rule of thumb, you can budget about $100/hr of labor time (if you can estimate it) plus the market price of any components and certifications. My suggestions:
- get more prices from local tooling & fixture manufacturers
- refer to the device as a fixture not as a gage
- try to validate/verify it in house if possible
- use standard size components as much as possible
- review the design to simplify manufacturing and assembly
 

Ron Rompen

Trusted Information Resource
#4
Without knowing the specifics of the fixture, it is very difficult to determine what is a 'correct' cost for it.

With that being said, my ballpark cost for any type of attribute fixture (when doing budgetary quotes for new business) was always at LEAST $15000. Good quality fixtures are not cheap.

I would suggest getting some competitive quotes from other suppliers. Make sure you are very explicit in what you require, as many gauge shops have a 'standard design' which may incorporate elements (and costs) that are not necessary for your fixture.
 
C

cpbraun

#5
My company is in turbine component machining and grinding. We contract with several tooling builders for custom inspection fixtures and holding nests. The "rule of thumb" to remember is "Precision costs money!" The least expensive holding fixtures we buy generally start at 5K. As a comparison, look at the Fowler, Starrett, or Mitutoyo catalogs. Price comparison of measuring devices reveals that adding an order of magnitude (.001 to .0001) will generally double the cost (approx). That is for mass produced gauging. Now consider that you are requiring a custom, one off job and your gage build precision should follow the 10:1 rule where it will affect part measurement. All that considered, I think the price you were quoted is pretty reasonable. Depending on your cost/part and the volume of production, you may want to consider finding a measurement solution with existing gages that can be purchased off the shelf. I hope that helps somewhat.
 
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