This guide helps purchasing teams read a force marking and request the evidence behind it. It does not select a force for an undocumented vehicle, provide a testing procedure or assign an acceptance limit to a MAKEXCAR product. The practical objective is a clear force record that can be reviewed alongside the actual application.
Read the marking as part of an identified reference
Photograph the readable marking and transcribe it beside the part reference. Keep the original image so another reviewer can check the transcription. Distinguish the force value from model numbers, production codes and other characters using the applicable product information. A number near an N symbol may be useful evidence, but an uncertain character should remain uncertain.
Record the vehicle, installation position and original reference associated with the inquiry. A force field detached from its application can be copied into the wrong replacement record. If a catalogue adds a vehicle variant or position condition, retain that condition rather than shortening the selection to the model name.
An old sample's marking identifies the stated specification when supported by its source. It does not measure the current force of that used sample. Keep the original rating, the observed sample condition and any actual test result in separate fields. Otherwise a worn or unidentified unit can become an unreliable basis for a new order.
Distinguish force from mass and panel capacity
The newton is a unit of force. A gas spring rating should not be rewritten as a panel mass rating without an application calculation and its assumptions. The buyer needs the documented support arrangement, mounting geometry and intended operation before treating a force value as evidence of a suitable application.
If a quotation describes a part using a weight-like label, ask which physical quantity the supplier means. Preserve the original label and request a corrected specification where necessary. Do not silently convert an ambiguous description into a force requirement that appears precise but lacks an agreed definition.
For a replacement inquiry, request evidence for the specific application rather than a statement that the spring can lift a certain object in every arrangement. A force specification and an application approval answer related but different questions. Keep both visible in the review file.
Ask what the named force point means
SUSPA's FAQ defines its F1 force using a specified rod position and measurement conditions. Its gas spring information also explains that force changes with rod displacement and that extension and retraction differ through friction. These principles support requesting a complete definition rather than comparing unexplained N markings.
Ask the manufacturer of the proposed item what its named force point represents. Record the position, movement direction and any settling or measurement condition stated in the applicable documentation. Do not assume another supplier uses the same meaning simply because both sources use the label F1.
This article does not apply SUSPA's numerical measurement position or temperature to MAKEXCAR products. The relevant definition must come from the actual proposed reference. If that definition is unavailable, record it as an open question rather than placing a generic condition in the acceptance sheet.
Keep extension and retraction records separate
A report should identify whether the stated force concerns extension, retraction or another defined condition. Preserve that label with every result. An unspecified peak, a static holding result and a named extension force should not be treated as interchangeable records merely because they are expressed in newtons.
When a supplier supplies a force characteristic, request its axis definitions, specimen identity and measurement method. Retain the original report or curve instead of copying a single point without its context. An unlabeled curve cannot establish what direction or position produced the reported value.
If the required application calls for a particular defined force record, compare the candidate against that requirement. Where the supplier proposes a different reporting basis, ask the technical reviewer whether the records can be meaningfully compared. Do not invent a conversion between two methods to complete a purchasing table.
Record temperature and other stated conditions
Keep the specified measurement conditions attached to the force value. Ask what temperature, specimen state and measurement procedure apply to the report, where those details are defined by the manufacturer. A result without its conditions leaves the reviewer unable to tell whether it answers the agreed question.
Distinguish a nominal rating from an actual inspection result. The nominal rating may appear on a drawing or product label; the inspection result belongs to an identified specimen and method. Request the applicable acceptance requirement and tolerance separately rather than assuming the marked value is the only possible acceptable reading.
No temperature range, tolerance or permitted force loss is supplied in this article. Those are product or application requirements that need their own evidence. A general explanation of rating conditions should not become a claim about MAKEXCAR's test process or operating performance.
Compare candidates on the same documented basis
Use one column for the original requirement and another for the proposed reference. Include the force definition, units and source revision in both columns. If the values look similar but the definitions differ, identify the difference before approving the candidate. A matching number can conceal a mismatched measurement basis.
Consider an inquiry in which the original document names an extension force at a defined point, while the quotation simply says “force.” The next request should ask for the quotation's definition, not demand another unexplained number. Once that definition is supplied, the reviewer can decide which comparison is supported.
A revised force record should identify the candidate part and the reason for revision. Preserve the earlier version with the correspondence. This helps prevent a sample inspected under one description from being approved against a different description that arrived later.
Use a force-rating evidence sheet
The following sheet is an editorial purchasing framework. Fill it with actual source records, and mark an unavailable field as pending. It is not a force specification for a stocked item, a laboratory procedure or an approval of a particular spring.
| Field | Evidence to retain | Question answered |
|---|---|---|
| Reference | Part number and readable marking image | Which item does the rating describe? |
| Force quantity | Force label, value and units | What is actually specified? |
| Position | Named point and rod-position definition | Where on the travel is it defined? |
| Direction | Extension, retraction or other defined condition | Which movement record is supplied? |
| Conditions | Specified temperature and method information | Under what basis was it recorded? |
| Requirement | Applicable nominal value and acceptance evidence | Which criterion is being reviewed? |
| Application | Vehicle, position and supporting selection record | What intended use is covered? |
Attach the original drawing, datasheet or report and retain its date or revision. Give the reviewer a short list of unresolved fields. This makes the next request specific and helps separate missing documentation from an actual disagreement between two supported specifications.
Do not treat a higher force as a universal upgrade
A proposed increase changes the specification being reviewed. Request an application-specific explanation and the evidence supporting the changed requirement. A promotional description such as “stronger” does not explain the intended operation or establish that the original mounting and panel arrangement remain suitable.
If the vehicle or panel has been modified, identify the change in the inquiry. The original replacement record may no longer describe the intended application. Ask the responsible technical party to review the actual arrangement instead of choosing a larger force by intuition.
Keep force selection separate from the other fitment fields. Even a supported force match does not resolve length, stroke, end connections or installation position. Conversely, matching those dimensions does not validate the force definition. Approval should show which parts of the evidence were reviewed and which questions remain open.
Connect any sample test to the supplied item
If force testing is agreed, request a report that identifies the specimen, equipment, method, conditions and actual observations. Ask for the requirement used to interpret the result. A generic certificate without specimen or reference identity is not a measurement of the sample under review.
Record the sample condition and any handling changes before testing. Do not turn a casual manual compression demonstration into a calibrated force result. This guide does not instruct buyers to compress, modify or open gas springs. An agreed professional assessment should provide the actual record where it is needed.
When the report is incomplete, request the missing fields before assigning a pass or fail decision. Where two reports differ, preserve both and ask for a technical comparison of their methods and objects. A confident conclusion needs evidence for the case, not a generic expectation of what the spring should do.
Interpret three incomplete force records
The following hypothetical records illustrate different reasons for holding a force comparison. They are documentation examples, not actual measurements or MAKEXCAR acceptance limits.
A nominal value has been mistaken for a failed inspection
Suppose an invented specification states a nominal 500 N with an explicitly agreed ±5% tolerance for a defined method. The tolerance amount is 500 × 0.05 = 25 N, so that hypothetical interval is 475–525 N. A reported 510 N would lie within that interval only if the specimen, force definition and conditions match the agreed requirement. This does not establish a real product tolerance or an application approval. If the quotation provides only 500 N without a tolerance, do not insert ±5% from this example. Request the actual criterion; a difference from nominal is not automatically a failure.
Two identical labels describe different records
One candidate's document identifies a defined extension point; another merely repeats the marking on an old unit. Equal numbers leave the second candidate's proposed-rating definition unknown. Obtain its datasheet or defined report rather than ranking the parts as equivalent. Conversely, if both definitions match but the measured results disagree, investigate the specimens and methods. Missing documentation and an observed disagreement require different follow-up records.
The buyer changes the panel but keeps the original rating
A replacement inquiry that becomes a modified-panel project needs a new application review. Preserve the original reference as historical context and describe the change separately. The old force marking neither approves the modified arrangement nor proves that a larger marking will solve it. Ask the responsible technical reviewer to identify the applicable requirement and basis. Purchasing can then compare an offer against that requirement, without inventing panel capacity from a newton value.
Send a definition-based MAKEXCAR inquiry
Copy the following fields into the inquiry. Separate a source-defined requirement from observed results and missing definitions, so that the supplier can answer the actual comparison question.
Reference and application: [original/proposed part references; vehicle and position; source and revision; marking-image filename]
Required force definition: [named point; value and N units; rod position; direction; definition source]
Conditions and criterion: [manufacturer-defined method/conditions; nominal or measured status; tolerance or criterion source; unresolved fields]
Sample evidence: [sample identity/condition; report reference; actual observations; relationship to the required definition]
Decision requested: [clarification of a missing definition, comparison of documented records, or application review of a changed requirement]
Use the MAKEXCAR Gas Struts category for the relevant family and send the force-definition inquiry with these records. A useful reply supplies the missing basis for the proposed reference or identifies the remaining application input. Keep the comparison unresolved when the criterion or measurement definition is absent; adding another unexplained force number would leave the same purchasing question unanswered.
