{"product_id":"shs-gearbox-shim-set-mixed","title":"SHS Gearbox Shim Set — Mixed Thickness","description":"\u003cdiv style=\"background:#edfaf1;border-left:4px solid #27ae60;padding:12px 16px;border-radius:0 6px 6px 0;margin:0 0 16px;font-size:13px;\"\u003e\n\u003cstrong style=\"color:#1a6b3a;\"\u003eSHS Mixed Thickness Gearbox Shim Set — the cheapest part in the gearbox and the one that decides whether the rest of it lasts.\u003c\/strong\u003e A gearbox part, not a bolt-on gain.\n\u003c\/div\u003e\n\u003cp\u003eShimming sets the clearance between each gear and the shell, and getting it right is the difference between a gearbox that runs quietly for years and one that chews itself up.\u003c\/p\u003e\n\u003cp\u003eA mixed set matters because you cannot know in advance which thicknesses a particular box will want. Shimming is done by trial, so having the range to hand is the whole point.\u003c\/p\u003e\n\u003cp\u003eIt is also the one job that no other upgrade can compensate for. Steel gears fitted to a badly shimmed box fail just as readily as the ones they replaced.\u003c\/p\u003e\n\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eSpecifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:13px;margin:0 0 18px;\"\u003e\n\u003ctr style=\"background:#1B3A6B;color:#fff;\"\u003e\n\u003cth style=\"padding:7px 12px;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"padding:7px 12px;text-align:left;\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eContents\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eMixed thickness shims\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eFits\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eStandard AEG gearboxes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eSold as\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eOne set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eGood to know before you buy\u003c\/h2\u003e\n\u003cp\u003eKeep the offcuts. Every gearbox wants a slightly different stack and a spare set saves a stripped build later.\u003c\/p\u003e\n\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I know when the shimming is right?\u003c\/strong\u003e \u003cbr\u003eEach gear should turn freely with only the smallest amount of side play, and the gears should mesh without binding when the shell is closed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need to reshim after changing gears?\u003c\/strong\u003e \u003cbr\u003eYes. Shim thickness is specific to the gears fitted, so a new set means starting again.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does a set have mixed thicknesses?\u003c\/strong\u003e \u003cbr\u003eBecause no two shells and gear sets are identical. Shimming is done by fitting and checking, which needs a range to choose from.\u003c\/p\u003e\n\u003cdiv style=\"background:#fffbe6;border-left:4px solid #f0d060;padding:12px 16px;border-radius:0 6px 6px 0;margin:0 0 16px;font-size:13px;\"\u003e\n⚠ \u003cstrong\u003eNo upgrade survives bad shimming:\u003c\/strong\u003e steel gears in a poorly shimmed shell strip just as readily as the parts they replaced.\n\u003c\/div\u003e\n\u003cdiv style=\"background:#1B3A6B;color:#fff;padding:12px 16px;border-radius:6px;margin:18px 0 0;font-size:13px;\"\u003e\n\u003cstrong style=\"color:#fff;\"\u003e💡 Titan Forge Airsoft tip:\u003c\/strong\u003e Take your time here. More gearboxes are killed by rushed shimming than by any part in them. Browse \u003ca href=\"\/collections\/gearbox-parts\" style=\"color:#cdd6f4;\"\u003egearbox parts\u003c\/a\u003e.\n\u003c\/div\u003e","brand":"SHS","offers":[{"title":"Default Title","offer_id":53619763609976,"sku":"25277721","price":4.95,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0562\/8097\/3450\/files\/30pc-airsoft-aeg-shim-set-Photoroom.jpg?v=1764255188","url":"https:\/\/www.titanforgeairsoft.com\/products\/shs-gearbox-shim-set-mixed","provider":"Titan Forge Airsoft","version":"1.0","type":"link"}