{"id":2957,"date":"2026-10-23T06:01:16","date_gmt":"2026-10-23T06:01:16","guid":{"rendered":"https:\/\/fschier.com\/?p=2957"},"modified":"2026-10-23T06:01:17","modified_gmt":"2026-10-23T06:01:17","slug":"door-handle-and-lock-compatibility-a-pre-order-checklist-2","status":"publish","type":"post","link":"https:\/\/fschier.com\/ja\/door-handle-and-lock-compatibility-a-pre-order-checklist-2\/","title":{"rendered":"\u30c9\u30a2\u30cf\u30f3\u30c9\u30eb\u3068\u30ed\u30c3\u30af\u306e\u4e92\u63db\u6027\uff1a\u4e88\u7d04\u6ce8\u6587\u524d\u306e\u78ba\u8a8d\u4e8b\u9805"},"content":{"rendered":"

Door handle and lock compatibility depends on more than a matching finish or a 92 mm PZ figure. A handle works with a lock only when the spindle, backset, fixing centres, door thickness, handing, cylinder layout and return-spring behaviour all agree, and a purchase order can fail on any one of them. For importers, distributors, door-system fabricators and OEM buyers, the error is rarely visible in a product photograph. It appears when a few thousand sets reach the warehouse and the levers droop, the screws miss the lock case, or the spindle is too short for the door. This checklist shows what to verify, in what order, and what to put in writing before approving volume production.<\/p>\n\n\n\n

Why One Matching Measurement Does Not Prove Compatibility<\/h2>\n\n\n\n

A handle is compatible with a lock when it passes four separate tests: it fits dimensionally, it drives the lock mechanically, it returns to rest correctly, and it meets any performance or accessibility rules that apply to the opening. Many order sheets record only the first.<\/p>\n\n\n\n

The common shortcut is “92 mm PZ and an 8 mm spindle, so it fits.” That is a reasonable first filter and a poor release criterion. ERA’s specifier guide to door handle sizes<\/a> shows why. It notes that lever-pad sets can use different PZ values on each side (typically 92 mm on the lever side and 62 mm on the pad side). It also notes that offset lock systems keep the same PZ but move the cylinder hole, and that some composite-door manufacturers use proprietary lock configurations with different backset or screw-centre requirements. Those details come from one manufacturer’s guidance, but they illustrate the pattern: a headline dimension can match while the interface does not.<\/p>\n\n\n\n

The assumption fails most often where the buyer sources the handle and the lock from different suppliers, or approves a handle against a lock that will be substituted later. It holds up better when both parts come from one documented system with a published drawing. Even then, assemble the physical pair before release.<\/p>\n\n\n\n

Illustrative scenario, not a customer case:<\/em> a distributor orders lever-pad sets for a multipoint lock range because the lever side matches 92 mm PZ. The pad-side cylinder hole sits at a different distance, so the sets cannot be fitted without drilling. The dimension that was checked was real. The dimension that mattered was not on the order sheet.<\/p>\n\n\n\n

\"\u30c9\u30a2\u30cf\u30f3\u30c9\u30eb\u3068\u30ed\u30c3\u30af\u306e\u4e92\u63db\u6027\uff1a\u4e88\u7d04\u6ce8\u6587\u524d\u306e\u78ba\u8a8d\u4e8b\u9805\"<\/div>\n\n\n\n

The Pre-Order Compatibility Checklist<\/h2>\n\n\n\n

Use the table as a working form. Each row is a separate field in your RFQ or purchase specification. The entries describe what to record, not recommended values. The correct figures come from the lock’s drawing or the approved sample.<\/p>\n\n\n\n

\u30c1\u30a7\u30c3\u30af<\/th>\u4f55\u3092\u8a18\u9332\u3059\u3079\u304d\u304b<\/th>What goes wrong if it is missed<\/th><\/tr><\/thead>
Lock type and model<\/td>Multipoint gearbox, mortice sashlock, tubular latch or other; manufacturer and model code<\/td>Right handle, wrong lock family; spindle and screw layout do not correspond<\/td><\/tr>
\u30d0\u30c3\u30af\u30bb\u30c3\u30c8<\/td>\u30d5\u30a7\u30fc\u30b9\u30d7\u30ec\u30fc\u30c8\u306e\u7aef\u304b\u3089\u30b9\u30d4\u30f3\u30c9\u30eb\u306e\u4e2d\u5fc3\u307e\u3067\u306e\u8ddd\u96e2<\/td>Spindle misses the follower or the handle sits too close to the door edge<\/td><\/tr>
PZ (handle-to-cylinder centres)<\/td>Spindle centre to cylinder centre, both sides for lever-pad or offset sets<\/td>Cylinder cut-out does not align with the key plug<\/td><\/tr>
\u30b9\u30d4\u30f3\u30c9\u30eb<\/td>Section, size, length, split or single, engagement depth<\/td>Free play, binding or a handle that will not pin to the follower<\/td><\/tr>
\u56fa\u5b9a\u30bb\u30f3\u30bf\u30fc<\/td>Screw positions relative to spindle and cylinder<\/td>Through-bolts land on the lock body or miss the fixing posts<\/td><\/tr>
\u30c9\u30a2\u306e\u539a\u3055<\/td>Minimum and maximum range, plus any profile recess<\/td>Spindle or screws too short or too long; rose does not seat flat<\/td><\/tr>
Handing and configuration<\/td>Left, right or reversible; lever-lever, lever-pad, inline or offset<\/td>Lever points the wrong way or the lock cannot be operated from the outside<\/td><\/tr>
\u30b7\u30ea\u30f3\u30c0\u30fc\u5f62\u5f0f<\/td>Cylinder type, length and projection beyond the plate<\/td>Cylinder protrudes through a thin backplate or sits too deep to turn<\/td><\/tr>
Return type<\/td>Sprung, spring-assisted or unsprung; lock spring suitability<\/td>Lever droop, incomplete latch projection<\/td><\/tr>
Hidden parts and finish<\/td>Spindle, screws, spring cassette, finish code<\/td>Surface matches but components differ from the approved sample<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Working Through the Checklist in Order<\/h2>\n\n\n\n

1. Identify the lock case, not just the lock function<\/h3>\n\n\n\n

“Entrance lock” or “patio lock” describes a function, not a part. Record the manufacturer, model, faceplate dimensions and whether the unit is a single-point case or part of a multipoint system.<\/p>\n\n\n\n

For multipoint systems, the handle drives a central gearbox that moves strips or rods to hooks, rollers or bolts. The category description for \u30de\u30eb\u30c1\u30dd\u30a4\u30f3\u30c8\u30c9\u30a2\u30ed\u30c3\u30af<\/a> on the Foshan CHIER site lists the attributes to match: backset, handle-to-cylinder centre distance, faceplate dimensions, spindle follower, locking-point positions and keeper layout. Backset, centre distance and the spindle follower are handle-side concerns. Faceplate dimensions, locking-point positions and keeper layout are not, but they affect how much force the handle must supply.<\/p>\n\n\n\n

Buyers who want to understand how the gearbox, faceplate and keepers interact before writing a specification can read this explanation of \u30de\u30eb\u30c1\u30dd\u30a4\u30f3\u30c8\u30c9\u30a2\u30ed\u30c3\u30af\u306e\u4ed5\u7d44\u307f<\/a>. The practical point: a handle that fits the gearbox can still feel stiff if the keepers are misaligned, so a “handle problem” in the field may not be a handle problem.<\/p>\n\n\n\n

2. Keep backset and PZ separate<\/h3>\n\n\n\n

Backset locates the spindle relative to the door edge. PZ locates the cylinder relative to the spindle. Two locks with the same backset can have different PZ values, and two handles with the same PZ can have different fixing centres. Record both, and take them from one datum, not from whichever end of the faceplate is nearest.<\/p>\n\n\n\n

3. Match spindle section, length and door thickness<\/h3>\n\n\n\n

An 8 mm square spindle is common in many European-style sets, but common is not universal, so confirm the section on the lock follower itself. Length depends on door thickness, the thickness of both roses or backplates, and the engagement depth the follower needs.<\/p>\n\n\n\n

Measurement error matters here. If an 8 mm spindle hole is measured from its edge instead of its centre, the position is off by about 4 mm, which is enough to move a fixing hole into the lock case. For buyers supplying several door profiles, specify a door-thickness range and confirm the fixing pack covers both ends of it. A spindle that works at the minimum thickness may be too short at the maximum.<\/p>\n\n\n\n

4. Check fixing centres, backplate size and cylinder cut-out<\/h3>\n\n\n\n

Fixing centres decide whether through-bolts clear the lock body. A narrow backplate with a Euro cylinder cut-out also fixes the cylinder position, so a mismatch in cylinder length or projection can leave the cylinder proud of the plate or too recessed to operate. When a thicker or thinner backplate replaces an existing one, the cylinder projection changes with it.<\/p>\n\n\n\n

5. Specify handing and configuration explicitly<\/h3>\n\n\n\n

Write the handing and the lever configuration in the order line: left, right or reversible; lever-lever or lever-pad; inline or offset. A reversible handle on a handed lock case still has to match the lock’s orientation. For export orders, define handing from a stated viewpoint (for example, as seen from the outside) so that both sides read it the same way.<\/p>\n\n\n\n

\"\u30c9\u30a2\u30cf\u30f3\u30c9\u30eb\u3068\u30ed\u30c3\u30af\u306e\u4e92\u63db\u6027\uff1a\u4e88\u7d04\u6ce8\u6587\u524d\u306e\u78ba\u8a8d\u4e8b\u9805\"<\/div>\n\n\n\n

6. Match return behaviour to the lock spring<\/h3>\n\n\n\n

This is the check that dimension-based guides usually skip. A sprung handle carries its own return spring. An unsprung handle relies on the lock case. Spring-assisted furniture shares the load. If an unsprung handle with a long, heavy lever is paired with a light lock spring, the pair can pass a bench test and still droop after installation.<\/p>\n\n\n\n

\u300c\u300d\u306b\u95a2\u3059\u308b\u8a18\u4e8b \u30b9\u30d7\u30ea\u30f3\u30b0\u5f0f\u3068\u975e\u30b9\u30d7\u30ea\u30f3\u30b0\u5f0f\u306e\u30c9\u30a2\u30cf\u30f3\u30c9\u30eb<\/a> covers the torque relationship in detail. For ordering purposes, the rule is simple. Ask the lock supplier whether the case is approved for unsprung furniture of your lever length and mass, and test the assembled pair rather than the loose parts. More spring is not automatically better either, because two strong springs can make the lever hard to press.<\/p>\n\n\n\n

How Handle Format Interacts with Lock Arrangement<\/h2>\n\n\n\n

Handle shape affects which interface risks you carry. The catalogue of \u30c9\u30a2\u30ce\u30d6<\/a> from CHIER includes round-rose, square-rose and narrow-backplate lever sets. Its category notes point buyers to door thickness, fixing centres, spindle connection, handing and lock arrangement as selection checks. The table below is a general guide to where each format tends to carry risk. It is not a statement about any one product.<\/p>\n\n\n\n

Handle format<\/th>Typical lock arrangement<\/th>Main compatibility risk<\/th>What to verify<\/th><\/tr><\/thead>
Lever on round rose<\/td>Mortice or tubular latch with separate cylinder, or sashlock<\/td>Rose diameter versus available door-face space; bolt positions<\/td>Fixing posts, rose diameter, spindle length<\/td><\/tr>
Lever on square rose<\/td>Same as above, often on narrower stiles<\/td>Rose size versus stile or profile width<\/td>Edge clearance, screw alignment<\/td><\/tr>
Narrow backplate with Euro cylinder cut-out<\/td>Multipoint gearbox or Euro-profile mortice lock<\/td>PZ, cylinder length and projection<\/td>PZ on both sides, cylinder format, backplate thickness<\/td><\/tr>
Lever-pad set<\/td>Multipoint lock with outside pad<\/td>Different PZ on each side; spindle usually on one side only<\/td>Both PZ values, spindle arrangement<\/td><\/tr>
Concealed-fix or large-diameter rose<\/td>Mortice, tubular or multipoint, depending on the set<\/td>Hidden fixings can limit adjustment<\/td>Installation tolerance, access for tightening<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Which Standards and Rules Actually Apply<\/h2>\n\n\n\n

Standards cover different parts of the assembly, and one certificate does not substitute for another.<\/p>\n\n\n\n

Lever handles.<\/strong> BS EN 1906:2012<\/a> specifies test methods and requirements for spindle and fastening elements, operating torques, free play, durability, static strength and corrosion resistance. It covers sprung and unsprung lever handles and knobs that operate latches and locks. BSI also states that suitability for fire or smoke door assemblies is decided by fire performance tests in addition to EN 1906. A handle test report therefore does not approve the handle for a fire door.<\/p>\n\n\n\n

Locks and latches.<\/strong> HOPPE’s summary of BS EN 12209<\/a> describes that standard as covering durability, strength, security and function of mechanically operated locks, latches and locking plates for doors. A handle certificate and a lock certificate are separate documents. Ask for both, and ask which handle was used when the lock was tested.<\/p>\n\n\n\n

Accessibility, US projects.<\/strong> \u306b\u3064\u3044\u3066 U.S. Access Board’s guide to doors and gates<\/a> states that door hardware must allow one-hand operation and avoid tight grasping, pinching or twisting of the wrist. It must operate with a maximum of 5 lbf and sit between 34 and 48 inches above the floor. Whether those rules apply depends on the building, the opening and the jurisdiction. Where they do, a strongly sprung lever that passes a durability test can still fail a force check.<\/p>\n\n\n\n

Always confirm the applicable standard with the project specification and the local authority. Requirements differ between the EU, UK and US, and this article does not replace that review.<\/p>\n\n\n\n

How to Prove Compatibility Before Mass Production<\/h2>\n\n\n\n

A paper match is a hypothesis. Test it on the assembled pair.<\/p>\n\n\n\n

    \n
  1. Classify the sample.<\/strong> Ask whether it is an appearance prototype, a functional prototype, a tooling sample, a pilot sample or a production-equivalent sample. Only the last two say much about repeatability.<\/li>\n\n\n\n
  2. Assemble the actual set.<\/strong> Use the production handle, spindle, lock case, cylinder, through-bolts and fixings, and mount them on a door section or test block at the stated thickness. Tighten to the intended assembly torque, since a loose display sample can behave differently.<\/li>\n\n\n\n
  3. Test both ends of the thickness range.<\/strong> Confirm spindle engagement and screw length at the minimum and maximum door thickness.<\/li>\n\n\n\n
  4. Check function, not only fit.<\/strong> Test latch retraction, full return, lever rest position, key operation with the handle fitted, and behaviour after repeated cycling.<\/li>\n\n\n\n
  5. Freeze the revision.<\/strong> Record the drawing revision, bill of materials, spring type and finish code on the approval document, and require written approval for any later change.<\/li>\n<\/ol>\n\n\n\n

    The detailed method, including measurement reports, acceptance matrices and golden-sample control, is in this guide on how to inspect door handle samples before mass production<\/a>. It also warns that a sample approved by eye does not establish that the supplier can repeat it at volume.<\/p>\n\n\n\n

    \"\u30c9\u30a2\u30cf\u30f3\u30c9\u30eb\u3068\u30ed\u30c3\u30af\u306e\u4e92\u63db\u6027\uff1a\u4e88\u7d04\u6ce8\u6587\u524d\u306e\u78ba\u8a8d\u4e8b\u9805\"<\/div>\n\n\n\n

    What Should Buyers Specify Before Requesting a Quote?<\/h2>\n\n\n\n

    A quotation based on “door handle for multipoint lock, black” will return a price for something, but not necessarily for the right thing. Send these items together so the supplier can check handle and lock as one pair:<\/p>\n\n\n\n