Vardhman lists Die Spring ISO JIS as a rectangular-wire high-force compression spring for mould and industrial applications. The page states 3–4 inch length, pressure compression that varies by load, MOQ of 10 pieces and carton or client-specific packing. ISO 10243 and JIS B 5012 are separate standards, so buyers must confirm the exact standard, series, part number, dimensions, rate and deflection table before ordering.
Die Spring ISO JIS is the product name used by Vardhman for a high-force rectangular-wire compression spring intended for mould and industrial applications. The page does not define whether it follows ISO 10243, JIS B 5012, both inventories, or a proprietary cross-reference range, so buyers need written standard and part-number confirmation.
ISO 10243 is a die-spring standard with its own dimensional families, load series and performance fields. Official product tables identify hole diameter, rod diameter, free length, rate, long-life deflection and force, maximum operating deflection and force, and solid deflection for each part number.
JIS B 5012 is a Japanese mould-spring standard with its own series codes, dimensions, rates and deflection limits. It is not automatically interchangeable with ISO 10243. The exact JIS series and part number must be stated in a quotation or cross-reference.
The page should clearly state one of three purposes: a catalogue containing both ISO and JIS springs, a verified cross-reference between separate ISO and JIS part numbers, or a proprietary series with its own drawing and test data. The current generic wording does not identify which purpose applies.
Vardhman has a separate ISO JIS Blue page that lists a 144 lb maximum field, while the generic ISO JIS page says pressure varies with load. The site does not explain whether Blue is one duty within a parent range. A comparison table should define standard, colour, part numbers, dimensions, rate and deflection.
The site separately lists ISO Red and ISO Yellow, suggesting colour-specific ISO products. The generic ISO JIS page should not combine them with JIS products unless it provides a documented standards map. Each colour page needs exact ISO series, dimensions, rate and allowable deflection.
Vardhman separately lists generic JIS and JIS Red products. Those pages should remain in a JIS B 5012 family unless a cross-reference table shows how they compare with ISO products. The ISO JIS page should link to them as separate standards, not imply one combined specification.
They can provide return, ejection, slide, stripper or plate force where a compact mechanical spring is suitable. Selection must consider mould temperature, preload, travel, force balance, available pockets, guidance and cycle rate for the exact part number.
Yes, when selected correctly. They can provide stripper, pad, return or stock-holding force. The standard, part number, rate, total compression, layout and cycle frequency must be verified before design approval.
The official sources reviewed list ISO 10243 and JIS B 5012 as separate die-spring standards. They do not identify one formal combined ISO JIS standard. Vardhman should therefore define whether this page is a comparison category, a cross-reference service, a dual inventory range or a proprietary product name.
A proper cross-reference compares separate ISO and JIS part numbers using hole diameter, rod diameter, free length, spring rate, preload, working stroke, long-life and maximum deflection, force values, material, coating and temperature. Similar colour or outside size alone is not a valid cross-reference.
ISO and JIS springs can differ in dimensional series, colour identification, duty ranges, allowable deflection and part-number systems. Both can be high-force die springs, but selection must use the exact standard's catalogue data. A generic ISO JIS label hides these differences.
Not automatically. Replacement requires matching the installation envelope and performance: hole diameter, rod diameter, free length, spring rate, preload, working stroke, force, maximum compression, temperature and expected life. If any field differs, tool force or travel may change.
No. Colour coding is standard- and manufacturer-specific. A red, blue or yellow spring can represent a different duty in ISO, JIS or another supplier's system. Always confirm the standard, series, part number and load-deflection table instead of selecting by colour alone.
No. Similar outside diameter does not ensure matching inside diameter, free length, spring rate, recommended compression or force. The tool pocket may accept both physically while the operating load and life remain different. Compare all part-number fields before substitution.
No. A force value from a separate colour page cannot define the generic range without the exact part number, spring size and compression point. Vardhman's generic ISO JIS page should publish its own part-number table and explain how the Blue product relates to it.
Yes, the live page states that it is manufactured with rectangular wire. This does not determine the governing standard, rate or duty. Vardhman should publish wire section, end treatment, dimensional tolerances and exact part-number data for every supplied ISO or JIS spring.
The supplier section mentions oil-tempered and chrome-alloy die-spring materials, while the specification table lists steel, brass, aluminium and copper. These fields conflict. Buyers should request the exact alloy grade, heat treatment, preset condition, shot peening and coating for the selected part number.
The generic non-ferrous material list conflicts with the page's high-force die-spring positioning and its oil-tempered or chrome-alloy wording. Unless Vardhman supplies engineering data for a specific non-ferrous spring, these entries should be removed as template carryovers.
The field is ambiguous. Die springs are helical and usually specified by round hole and rod diameters, while the wire cross-section may be rectangular, trapezoidal or shaped. The page should separate installation geometry from wire geometry.
It is not a usable spring specification. A valid table must show spring rate and force at defined deflections for each part number, together with preload, long-life deflection, maximum operating deflection and solid deflection. 'Varies as per load' should be replaced with numeric data.
The page does not publish containment-hole diameters. A cross-reference must show the recommended hole for each ISO and JIS part number. Incorrect clearance can cause rubbing, heat, side load or excessive movement in the tool pocket.
The recommended guide-rod diameter is missing. Rod guidance can prevent buckling, but the rod must leave enough internal clearance during compression. Use the exact value from the selected ISO or JIS part-number table.
Free length affects installed preload, available working travel, total compression, rate and final force. Two springs with similar diameters but different free lengths may behave differently. Cross-reference only parts with verified installation and performance compatibility.
The live page does not publish a spring rate. Rate must be provided for each exact ISO or JIS part number in N/mm or lbf/in, normally with tolerance. It is required to calculate preload force and operating force.
Preload depends on the actual standard, part-number rate, required starting force, available travel and life target. It keeps the spring seated but adds to total compression. No universal preload can be assigned to an undefined ISO JIS product.
Allowable travel depends on the exact ISO or JIS series, free length, rate and desired life. The live page provides no working-stroke value. Buyers need long-life, maximum operating and solid-deflection data for each part number.
Total compression equals installed preload plus additional working travel. This total must stay within the selected part number's allowable deflection. Ignoring preload can overload the spring even when the machine stroke appears acceptable.
Long-life deflection is a lower operating compression selected to improve fatigue life, with a corresponding force. ISO and JIS catalogues may organise these values differently. Vardhman should publish the verified value for every supplied part number.
Maximum operating deflection is the upper recommended service compression and is not the same as solid deflection. It must be taken from the exact standard and part number. The generic page does not provide this critical value.
Solid or coil-bound condition is a dimensional limit, not a normal operating target. Repeated operation near solid height greatly reduces life. Use the exact part-number table and maintain a safety margin below solid deflection.
Within the approved linear range, force equals spring rate multiplied by compression. Initial force uses preload, and final force uses total compression. The calculation is valid only when the exact part-number rate and allowed deflection range are known.
For identical springs installed in parallel and compressed equally, total force is the sum of individual forces at that compression. Use matched part numbers and equal pocket depths. Mixing ISO and JIS springs in one balanced plate should be avoided unless the layout is engineered.
The page does not state Celsius or Fahrenheit and gives no alloy, coating, exposure duration or load derating. ISO and JIS products may have different material limits. Request a verified temperature-performance table for the exact part number.
No universal percentage should be used. The comparison depends on equal dimensions, material, wire section and deflection. Vardhman's approximate 30% statement needs a defined reference and test basis; use the exact spring-rate and load table instead.
There is no universal cycle-life value for an undefined combined range. Life depends on the actual standard, part number, total compression, frequency, temperature, corrosion, guidance and material. Use verified long-life deflection data for the selected product
High-speed suitability depends on total compression, strokes per minute, heat, friction, guidance and material. Higher cycling frequency generally reduces life at the same deflection. Confirm the exact ISO or JIS part number against the complete operating cycle.
Guidance depends on spring slenderness and tool design. A rod, containment pocket or both can prevent buckling and side movement. The clearances must match the exact standard and part number because ISO and JIS installation diameters may differ.
Buckling is promoted by excessive slenderness, inadequate guidance, tilted seats, side loading and unequal pocket depth. Correct the pocket and rod design and select a suitable free length rather than substituting another standard only because it fits the hole.
The replacement may have a different outside diameter tolerance or diameter growth during compression. A physically similar spring can rub the wall, generate heat and lose force. Compare the recommended containment hole and guide rod for both part numbers.
Loose end-to-end stacking can misalign, buckle or divide travel unpredictably. Select a longer approved spring or use an engineered guided arrangement. Do not stack springs to compensate for a missing equivalent length in the other standard.
Mixing standards, rates, free lengths or used and new springs can create unequal force and plate tilt. Balanced layouts should use matched part numbers and installation depths unless an engineer intentionally designs different forces at different positions.
Permanent set means the spring does not return to its original free length after unloading. It often indicates excessive total compression, overload, high temperature or unsuitable material. Replace it only after correcting the selection or application cause.
Excessive deflection, high cycle rate, corrosion, rubbing, side load, surface damage or material defects can initiate fatigue cracks. Review the fracture, pocket, rod, compression, frequency and environment before selecting a replacement standard.
Corrosion pits reduce the wire section and create stress concentrations that promote fatigue. Coating systems can differ by supplier and standard. Confirm the actual material and coating and replace springs showing rust, pitting or cracks.
The live page lists 3–4 inches, but official ISO and JIS ranges normally contain many free lengths. Vardhman should publish the exact lengths available for each standard, series and diameter, preferably in millimetres with optional inch equivalents.
The page states customisation is available. Send the required standard, existing part number, hole and rod diameters, free length, rate or force points, preload, stroke, material, coating, temperature, cycle target, quantity and drawing. Confirm whether the result remains standard-compliant or becomes proprietary.
Price depends on whether the item is ISO, JIS or proprietary, plus the exact part number, dimensions, material, coating, rate, duty, quantity, inspection, customisation, packing and destination. The blank provisional price field should be replaced by a formal quotation.
The live page lists a minimum order quantity of 10 pieces and says standard items are stocked. Confirm whether MOQ applies per part number, whether ISO and JIS items can be mixed and which exact standards, series, diameters and lengths are currently available.
Send the existing ISO or JIS part number, governing standard, hole diameter, rod diameter, free length, installed length, preload, working stroke, required initial and final forces, number of springs, cycle rate, temperature, environment, quantity, packing and destination. Request the verified cross-reference and load-deflection table before approval.
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