||Check annual requirements and
||With an annual contact the supplier
can minimize: tooling, setup costs and material costs.
Greater flexible for the most economical method of
manufacturing is allowed.
||OVER AND UNDER RUNS
||Ordering exact qualities increases
||Allowance must be made for overage
in production which must be prorated in the quoted
Allow sufficient lead time for normal Planning.
Provide your supplier with the best forecast .
||Quick deliveries involve premium
material and labor costs. A longer / better forecast
permits more economical manufacturing runs.
If special packaging, labeling or bar coding is
required, advise the supplier of this when the
request for pricing is made.
||Unusual packaging requirements are expensive due to
special material and labor. if advised in advance , a
supplier may be able to provide alternative, less
||Design and application permitting,
Specify standard sizes of Free machining grades.
||Standard sizes cost less and are
more readily available. free machining material
(Brass) yields greater production, improved finish and
||Specify mo closer tolerance then
absolutely functionally necessary
If required, suppliers of precision machined
products can and will make the parts with close
tolerance. However, higher costs can be excepted
the closer the tolerance requirements
||Hole diameters should be specified
to the maximum allowable limits.
||Suppliers of precision machined products stock
standard drills and reamers. special internal
diameters can be produced but with expansive special
||Specify standard threads as far as possible like UNC ,
UNF, OSO Metric, BSP (G) NPT, NPTF, BSW, BA etc. Also
for internal threads keep short lengths if
||Special Threads require special tools and gauges.
Closer fits may require additional operations.Full
threads are harder to tap.
||GAUGES AND GAUGING EQUIPMENT
||Wherever possible part design should avoid the need
for special gauges.
||Special gauges. and gauging equipment add to part
cost. Customers may supply special gauges to eliminate
||Clearly specify surface finish no closer then
necessary to meet function requirements
||Finer surface finish may require special tooling,
slower cycle time or additional second operations and
special handling and packaging methods.
||Be as detailed as possible with the quality
requirements. Specify which characteristics are of
greatest importance to products performance.
||This will allow the supplier to focus on what is
important and to follow parallel or compatible quality