Specifications · Process route · Measured evidence
Representative sensor, solenoid and motor parts with the material, envelope, process route and controlling characteristics that shape a quotation. Each card links to the published record behind it.
A deep-drawn or stamped housing specification should state the part function, material grade and temper, outside diameter, inside diameter, length or height, wall thickness with its measurement locations, process route, critical characteristics, surface finish, inspection method and annual volume. At Zhejiang Balford Mechatronics Co., Ltd., quotations are reviewed against a 12,000 m² plant, presses from 25 to 350 t and a maximum deep-draw diameter of 250 mm. In-house tooling can cover blanking, drawing, trimming, piercing, tapping and machining; heat treatment, plating, passivation and other outsourced operations are named when they belong to the route. A 0.01 mm callout is considered only for selected critical machined features and must be confirmed from the drawing. The quotation should also name the inspection frequency, acceptance criteria, finishing route and customer-specific requirement revision. The dimensions below come from the published 398-row sensor catalogue or existing Balford case records.
O2-B / A001-4
SUS 316 stainless steel
Route: Blank → deep draw → redraw / trim → clean and inspect
Critical: Shell roundness, wall condition and the fit interface are defined by the customer drawing.
Source: Published sensor catalogue, row A001-4, source page 4
NOx / L027-3
SUS 301 stainless steel
Route: Blank → deep draw → trim → clean and inspect
Critical: Thin-wall consistency and the sealing interface are drawing-controlled characteristics.
Source: Published sensor catalogue, row L027-3, source page 20
Injector / EGT / K018
SUS 310 stainless steel
Route: Blank → deep draw → trim / pierce → clean and inspect
Critical: Thin-wall geometry and heat-resistant material selection are confirmed against the application.
Source: Published sensor catalogue, row K018, source page 48
Brake shield
316L stainless steel
Route: Deep drawing → magnetic heat treatment → inspection
Critical: Thin wall, concentricity and burr-free edges support the magnetic and sealing function.
Source: Existing Balford case record
Fuel injector
304 stainless steel
Route: Deep drawing → heat treatment → dimensional inspection
Critical: Wall consistency over the 63.5 mm depth and concentricity are the controlling features.
Source: Existing Balford case record
CMM sample
430 stainless steel
Route: Thin-gauge deep drawing → sizing → customer CMM verification
Critical: Diameter, roundness and coaxiality were measured on three consecutive parts by the customer.
Source: Customer ZEISS Calypso reports
Wiper motor
DC01 / DC04 mild steel
Route: Blanking → deep drawing → CNC turning → piercing → surface treatment
Critical: Roundness and concentricity are maintained for the bearing and assembly interface.
Source: Existing Balford case record
ESC / ABS washer
Cold-rolled steel
Route: Precision stamping → deburring → surface treatment
Critical: Flat, burr-free seating geometry and a concentric centre hole support valve assembly.
Source: Existing Balford case record
Balford uses a representative-envelope card: it publishes only dimensions that already exist in the sensor catalogue, or manufacturing facts from an existing case study, and omits customer names, controlled drawings, part numbers, programme volumes and prices. The card separates the material and nominal envelope from the controlling characteristic, so a buyer can judge process fit without treating the example as a standard part or a guaranteed tolerance. Each record links back to its source page. Where a customer supplied inspection evidence, the evidence page identifies who measured the parts and links the original report. A production quotation is still made from the buyer’s controlled drawing, requested volume and agreed inspection route.
A nominal dimension is only useful when the process route and release evidence are visible. These six checkpoints connect the part card to the documentation path.
Revision, material, tolerances, finish and annual volume define the review basis.
Drawing requirements →Draw stages, tooling, secondary operations and outsourced processes are fixed before quotation.
DFM analysis →Tool design and tryout are controlled by the same engineering team, with trial parts measured against the drawing.
In-house tooling →First-article values and the agreed PPAP-aligned submission package support production release.
Quality evidence →Where required, the measurement source is agreed; the published sleeve example uses the customer’s CMM reports.
CMM reports →Inspection follows the agreed plan, with material, finish and lot records retained.
PPAP and FAI →The same drawing discipline changes with the service environment. This matrix shows which part families and characteristics usually drive the manufacturing review.
| Market | Housing and part families | What changes the review | Industry page |
|---|---|---|---|
| Automotive | Sensor housings, solenoid valve parts, motor housings, end caps and precision washers | FAI, PPAP-aligned documentation, IMDS support, wall and concentricity control | Open market page → |
| HVAC & refrigeration | Temperature sensor parts, solenoid valve housings, caps and tube assemblies | Seamless forming where a weld path must be removed, clean surfaces and assembly fit | Open market page → |
| Hydraulics | Cartridge and proportional valve housings, spring seats, sleeves and ferrules | Sealing faces, bore geometry, concentricity and the declared heat-treatment route | Open market page → |
| Electronics | Sensor shells, magnetic shields, copper base plates and thin stamped contacts | Flatness, magnetic grade, plating and dimensional stability at thin gauge | Open market page → |
No. The cards are representative envelopes taken from the published 398-row sensor catalogue and existing Balford case records. Production is made to the customer drawing, material, tolerance and annual volume.
No. Customer names, drawings, part numbers and programme details are not published. The library uses either already-published catalogue dimensions or anonymised manufacturing facts from an existing case record.
It applies only to selected critical machined features where the drawing, geometry, material and inspection conditions support it. It is not a blanket tolerance for drawing or stamping.
No. Balford holds ISO 9001:2015 and uses process controls aligned with IATF 16949 requirements. Certification is not claimed.
Engineering can compare the part with the published envelopes, then confirm draw stages, tooling, outsourced operations and inspection against your actual drawing.