QUOTATION FOR CUSTOMIZED FASTENER
Situation 1．With Drawing, No Physical Sample
This is the most standard and accurate quotation scenario. With a 2D or 3D drawing, full feasibility analysis can be performed.
1 - 1
Requirement Review
Verify dimensions, tolerances, thread type, material, heat treatment and surface finishing for fastener.
1 - 2
Cold Forming Feasibility Analysis
1 - 3
Evaluate if secondary machining is needed, such as turning, milling, and drilling.
1 - 4
Mode Cost
Calculate the cost of molds, such as forming dies, extrusion dies, reverse extrusion dies, and punch pins.
1 - 5
Material & Production Cost
Calculate weight, material cost, forging cost, thread rolling, heat treatment, and surface plating.
1 - 6
Quotation
Includes tooling cost, unit price, MOQ, and lead time.
Situation 2．No Drawing, With Physical Sample
Normally, would be existing parts looking for improvments, replacement pars, or overseas customers who can only send samples for evaluation.
2 - 1
Reverse Engineering
Measure dimensions, including head, shank, hole diameter, depth, thread pitch, etc.
2 - 2
Drawing Creation
Tsuen Mei engineers create full 2D/3D drawings.
2 - 3
Tolerance estimation, strength evaluation, forging shape optimization
2 - 4
Forming Analysis
Sample may be CNC-made, redesign for cold forging is essential. Need to evaluate reduction, backward extrusion, and metal flow.
2 - 5
Tooling & Manufacturing Cost
Recalculate based on reverse-engineered drawings.
2 - 6
Quotation
Includes mold fee, unit price, drawing confirmation process, and delivery date.
Situation 3．No Drawing, No Sample
This is the most complex scenario and requires extensive communication—usually co-developing a new product.
3 - 1
Application Interview
Where will it be used? Pressure load? Related information with bore size match.
3 - 2
Engineering Proposal
Offer head type, thread type, materials, and structural concepts advices.
3 - 3
May require sketches and preliminary specifications
3 - 4
Drawing Development
Engineers create official 2D/3D drawings.
3 - 5
Forging Feasibility Study
Evaluate forging feasibility (number of stations, backward extrusion, reduction limits)
Highest-risk scenario, requiring strict analysis.
3 - 6
Tooling & Price Estimation
Most complex tooling design, requiring multiple cost analysis.
3 - 7
Quotation
Includes design fee (if applicable), tooling cost, unit price, sampling steps, and lead time.