{"id":5191,"date":"2014-02-12T13:17:51","date_gmt":"2014-02-12T12:17:51","guid":{"rendered":"https:\/\/michael-hoepfl.com\/digital-world\/replace-a-biffar-security-lock-cylinder-without-special-tools\/02-2014\/"},"modified":"2026-08-11T21:07:07","modified_gmt":"2026-08-11T19:07:07","slug":"replace-a-biffar-security-lock-cylinder-without-special-tools","status":"publish","type":"post","link":"https:\/\/michael-hoepfl.com\/en\/life-hacks\/replace-a-biffar-security-lock-cylinder-without-special-tools\/02-2014\/","title":{"rendered":"Replace a Biffar Security Lock Cylinder Without Special Tools"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Anyone who is reasonably handy might assume that replacing the lock cylinder in their front door is something they can do themselves \u2013 perhaps because new keys are needed or for security reasons after a key has been lost. And if it looks as simple as in the following video, wanting to save the cost of calling a locksmith seems only natural.<\/p>\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"17 Schliesszylinder wechseln\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/FsBAOJhHTCA?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n<p class=\"wp-block-paragraph\">Remove the screw, replace the lock cylinder and put the screw back in \u2013 unfortunately, it is not that simple with Biffar security locks. Removing the cylinder is still easy. But then it refuses to go back in: something suddenly blocks the cylinder from being reinserted. In my case it was a small brass plate that could not simply be pushed aside (see photo above). While searching online I found <a href=\"http:\/\/www.tischlerforum.info\/showthread.php?t=9025\" target=\"_blank\" rel=\"noopener noreferrer\">this carpentry forum<\/a>. It reports that a special tool is required to install cylinders in Biffar security locks. Apparently this tool is called a \u201cZabad\u00e4us\u201d, and supposedly only locksmiths authorised by Biffar have one.<\/p>\n\n<p class=\"wp-block-paragraph\">However, forum user Michael SB writes:<\/p>\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">You only need the Zapad\u00e4us if the door is closed and the cylinder is removed while the door is locked.<\/p>\n<\/blockquote>\n\n<p class=\"wp-block-paragraph\">To find out how it works without the special tool, I removed and dismantled the entire mortise lock; see image 1 below. Image 2 shows the mechanism that prevents the lock cylinder from being inserted. The third image shows how to release the lockout mechanism with the housing open. Finally, image 4 shows the trick for reinserting a lock cylinder without Biffar\u2019s special tool. You can use a bent Allen key, for example, to operate the bolt inside the installed mortise lock. While doing so, reinsert the lock cylinder. As it is pushed through, the cylinder can now move the brass plate down and out of the way. And just like that, you have saved yourself the locksmith call-out with the special tool.<\/p>\n\n<h3 class=\"wp-block-heading\">UPDATE 27 April 2014<\/h3>\n\n<p class=\"wp-block-paragraph\">Reader Mario emailed me with the following information:<\/p>\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">If the door can be opened and you have a clear view of the latch \u2013 which is normally the case because you have just removed the screw holding the lock cylinder \u2013 you release the safety mechanism by inserting a pointed tool (awl, nail) into the small hole below the latch. The locking pin becomes movable and can then be pushed down by the lock cylinder itself.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The hole is even visible in your image #4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Best regards, and thanks for the helpful pictures<\/p>\n<\/blockquote>\n\n<p class=\"wp-block-paragraph\">Thanks for your feedback, Mario!<\/p>\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped bwp-block-editor-popup-gallery wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image\"><a href=\"https:\/\/michael-hoepfl.com\/wp-content\/uploads\/2014\/02\/IMG_20140212_110301-e1392205858385.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-id=\"2869\" src=\"https:\/\/michael-hoepfl.com\/wp-content\/uploads\/2014\/02\/IMG_20140212_110301-e1392205858385.jpg\" alt=\"Image 1: Disassembled Biffar security mortise lock\" class=\"wp-image-2869\" srcset=\"https:\/\/michael-hoepfl.com\/wp-content\/uploads\/2014\/02\/IMG_20140212_110301-e1392205858385.jpg 768w, https:\/\/michael-hoepfl.com\/wp-content\/uploads\/2014\/02\/IMG_20140212_110301-e1392205858385-225x300.jpg 225w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/a><figcaption class=\"wp-element-caption\">Image 1: Disassembled Biffar security mortise lock<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/michael-hoepfl.com\/wp-content\/uploads\/2014\/02\/IMG_20140212_110309-e1392205988205.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-id=\"2870\" src=\"https:\/\/michael-hoepfl.com\/wp-content\/uploads\/2014\/02\/IMG_20140212_110309-e1392205988205.jpg\" alt=\"Image 2: Mechanism that prevents the lock cylinder from being inserted\" class=\"wp-image-2870\" srcset=\"https:\/\/michael-hoepfl.com\/wp-content\/uploads\/2014\/02\/IMG_20140212_110309-e1392205988205.jpg 768w, https:\/\/michael-hoepfl.com\/wp-content\/uploads\/2014\/02\/IMG_20140212_110309-e1392205988205-225x300.jpg 225w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/a><figcaption class=\"wp-element-caption\">Image 2: Mechanism that prevents the lock cylinder from being inserted<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/michael-hoepfl.com\/wp-content\/uploads\/2014\/02\/IMG_20140212_110331-15.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-id=\"2871\" src=\"https:\/\/michael-hoepfl.com\/wp-content\/uploads\/2014\/02\/IMG_20140212_110331-15.jpg\" alt=\"Image 3: Releasing the lockout mechanism with the housing open\" class=\"wp-image-2871\" srcset=\"https:\/\/michael-hoepfl.com\/wp-content\/uploads\/2014\/02\/IMG_20140212_110331-15.jpg 768w, https:\/\/michael-hoepfl.com\/wp-content\/uploads\/2014\/02\/IMG_20140212_110331-15-225x300.jpg 225w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/a><figcaption class=\"wp-element-caption\">Image 3: Releasing the lockout mechanism with the housing open<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/michael-hoepfl.com\/wp-content\/uploads\/2014\/02\/IMG_20140212_111243-4.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-id=\"2873\" src=\"https:\/\/michael-hoepfl.com\/wp-content\/uploads\/2014\/02\/IMG_20140212_111243-4.jpg\" alt=\"Image 4: Reinserting a Biffar lock cylinder without the special tool\" class=\"wp-image-2873\" srcset=\"https:\/\/michael-hoepfl.com\/wp-content\/uploads\/2014\/02\/IMG_20140212_111243-4.jpg 768w, https:\/\/michael-hoepfl.com\/wp-content\/uploads\/2014\/02\/IMG_20140212_111243-4-225x300.jpg 225w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/a><figcaption class=\"wp-element-caption\">Image 4: Reinserting a Biffar lock cylinder without the special tool<\/figcaption><\/figure>\n<\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Anyone who is reasonably handy might assume that replacing the lock cylinder in their front door is something they can do themselves \u2013 perhaps because new keys are needed or [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":5192,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[321],"tags":[445,308],"class_list":["post-5191","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-life-hacks","tag-diy","tag-how-to","bwp-blog-post","bwp-masonry-item","bwp-col-1","bwp-post-has-title"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Replace a Biffar Security Lock 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