{"product_id":"jen-ken-vertical-air-bath-30-9-knife-kiln","title":"Jen-Ken Vertical Air Bath 30+9 Knife Kiln","description":"\u003cstyle\u003e\n.d{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;color:#111;line-height:1.6;width:100%;max-width:100%;display:block!important}\n.d *{box-sizing:border-box}\n.d-intro{padding-bottom:36px;margin-bottom:44px;border-bottom:2px solid #111;display:block}\n.d-kicker{font-size:0.72em;letter-spacing:0.16em;text-transform:uppercase;color:#FF8C42;font-weight:700;margin-bottom:12px;display:block}\n.d-title{font-size:1.9em;font-weight:700;color:#000;line-height:1.15;margin-bottom:12px;display:block}\n.d-meta{font-size:0.88em;color:#888;display:block;margin-bottom:20px}\n.d-meta b{color:#bbb;margin:0 7px;font-weight:400}\n.d-lead{font-size:0.97em;color:#444;line-height:1.9;display:block}\n.d-glance{display:grid!important;grid-template-columns:repeat(4,1fr);border:1px solid #e0e0e0;margin-bottom:64px}\n.d-gi{padding:16px 18px;border-right:1px solid #e0e0e0}\n.d-gi:last-child{border-right:none}\n.d-gl{font-size:0.65em;letter-spacing:0.13em;text-transform:uppercase;color:#aaa;font-weight:600;display:block;margin-bottom:5px}\n.d-gv{font-size:0.97em;font-weight:700;color:#111;display:block}\n.d-section{display:block;padding-bottom:0}\n.d-sh{font-size:0.65em;letter-spacing:0.16em;text-transform:uppercase;color:#aaa;font-weight:700;display:flex!important;align-items:center;gap:10px;padding-top:52px;padding-bottom:14px;margin-bottom:22px;border-bottom:1px solid #e8e8e8}\n.d-sh:before{content:'';width:18px;height:2px;background:#FF8C42;flex-shrink:0;display:block}\n.d-grid2{display:grid!important;grid-template-columns:1fr 1fr;border:1px solid #e8e8e8}\n.d-cell{padding:20px 22px;border-bottom:1px solid #e8e8e8;border-right:1px solid #e8e8e8;display:block}\n.d-cell:nth-child(even){border-right:none}\n.d-cell:nth-last-child(-n+2){border-bottom:none}\n.d-cn{font-size:0.88em;font-weight:600;color:#111;margin-bottom:6px;display:block}\n.d-cd{font-size:0.81em;color:#666;line-height:1.7;display:block}\n.d-specs{border:1px solid #e8e8e8;display:block}\n.d-sr{display:grid!important;grid-template-columns:210px 1fr;border-bottom:1px solid #e8e8e8}\n.d-sr:last-child{border-bottom:none}\n.d-sr:nth-child(even){background:#f9f9f9}\n.d-sk{font-size:0.82em;font-weight:600;color:#555;padding:12px 18px;border-right:1px solid #e8e8e8;display:block}\n.d-sv{font-size:0.82em;color:#111;padding:12px 18px;display:block}\n.d-warranty{padding:16px 22px;border-left:3px solid #FF8C42;background:#fffaf5;font-size:0.83em;color:#555;line-height:1.7;display:block;margin-top:18px;margin-bottom:0}\n.d-faq-item{padding-top:22px;padding-bottom:22px;border-bottom:1px solid #e8e8e8;display:block}\n.d-faq-item:last-child{border-bottom:none;padding-bottom:0}\n.d-q{font-size:0.88em;font-weight:700;color:#111;margin-bottom:9px;display:block}\n.d-a{font-size:0.84em;color:#555;line-height:1.85;display:block}\n.d-cta{background:#f5f0eb;border:1px solid #e0d5c8;border-left:3px solid #FF8C42;padding:28px 32px;margin-top:52px;display:flex!important;justify-content:space-between;align-items:center;gap:24px}\n.d-cta-title{font-size:0.97em;font-weight:700;color:#111;display:block;margin-bottom:6px}\n.d-cta-sub{font-size:0.84em;color:#555;line-height:1.65;display:block}\n.d-cta-link{font-size:0.72em;letter-spacing:0.12em;text-transform:uppercase;color:#FF8C42;font-weight:700;text-decoration:none;white-space:nowrap;flex-shrink:0;border:1px solid #FF8C42;padding:10px 16px;display:inline-block}\n.d-cta-link:hover{background:#FF8C42;color:#fff}\n@media(max-width:640px){.d-glance,.d-grid2{grid-template-columns:1fr 1fr}.d-gi:nth-child(2){border-right:none}.d-gi:nth-child(-n+2){border-bottom:1px solid #e0e0e0}.d-cell{border-right:none!important}.d-sr{grid-template-columns:1fr}.d-sk{border-right:none;border-bottom:1px solid #e8e8e8;padding-bottom:4px}.d-cta{flex-direction:column;align-items:flex-start}}\n\u003c\/style\u003e\n\n\u003cdiv class=\"d\"\u003e\n\n\u003cdiv class=\"d-intro\"\u003e\n  \u003cspan class=\"d-kicker\"\u003eJen-Ken  ·  Vertical Air Bath  ·  Knife \u0026amp; Blade Heat Treating\u003c\/span\u003e\n  \u003cspan class=\"d-title\"\u003eJen-Ken Vertical Air Bath 30+9 Knife Kiln\u003c\/span\u003e\n  \u003cspan class=\"d-meta\"\u003eVertical Air Bath 30+9 \u003cb\u003e·\u003c\/b\u003e 240V \u003cb\u003e·\u003c\/b\u003e 11\" x 39\" chamber \u003cb\u003e·\u003c\/b\u003e 2,200°F\u003c\/span\u003e\n  \u003cspan class=\"d-lead\"\u003eThe 30+9 is the 30 with nine more inches bolted on, and it comes apart the same way — two sections that separate, which is how you get a 39-inch chamber through a shop door and onto a stand without a crew. Blades hang vertically in the air bath so nothing touches the steel while it soaks, and the refractory baffles keep the heat in when the lid comes off. It takes blades to 38\", runs to 2,200°F, and draws 33 amps on a 6-50 plug.\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"d-glance\"\u003e\n  \u003cdiv class=\"d-gi\"\u003e\n\u003cspan class=\"d-gl\"\u003eMax Temp\u003c\/span\u003e\u003cspan class=\"d-gv\"\u003e2,200°F\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"d-gi\"\u003e\n\u003cspan class=\"d-gl\"\u003eBlade length\u003c\/span\u003e\u003cspan class=\"d-gv\"\u003eUp to 38\"\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"d-gi\"\u003e\n\u003cspan class=\"d-gl\"\u003eChamber\u003c\/span\u003e\u003cspan class=\"d-gv\"\u003e11\" W x 39\" D\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"d-gi\"\u003e\n\u003cspan class=\"d-gl\"\u003ePower\u003c\/span\u003e\u003cspan class=\"d-gv\"\u003e240V · 33A\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"d-section\"\u003e\n  \u003cdiv class=\"d-sh\"\u003eWhat’s included\u003c\/div\u003e\n  \u003cdiv class=\"d-grid2\"\u003e\n    \u003cdiv class=\"d-cell\"\u003e\n\u003cspan class=\"d-cn\"\u003eOrton AutoFire AF4X 3-button controller\u003c\/span\u003e\u003cspan class=\"d-cd\"\u003eFitted as standard and shipped preloaded with heat-treating programs — ramp, soak and quench-point schedules, not a pottery cone table.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-cell\"\u003e\n\u003cspan class=\"d-cn\"\u003eTwo-section chamber\u003c\/span\u003e\u003cspan class=\"d-cd\"\u003eThe oven separates into two pieces, which is the only practical way to move a 39-inch chamber into position.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-cell\"\u003e\n\u003cspan class=\"d-cn\"\u003eVertical blade suspension\u003c\/span\u003e\u003cspan class=\"d-cd\"\u003eBlades hang by pin, spring clasp or ceramic rod rather than resting on anything.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-cell\"\u003e\n\u003cspan class=\"d-cn\"\u003eRolling stand with casters\u003c\/span\u003e\u003cspan class=\"d-cd\"\u003eJen-Ken lists a stand with casters for this model.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-cell\"\u003e\n\u003cspan class=\"d-cn\"\u003eRefractory baffle system\u003c\/span\u003e\u003cspan class=\"d-cd\"\u003eA custom baffle arrangement that holds heat in the chamber when the lid comes off, so pulling one blade does not drop the temperature on the rest.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-cell\"\u003e\n\u003cspan class=\"d-cn\"\u003ePower-interrupt lid switch\u003c\/span\u003e\u003cspan class=\"d-cd\"\u003eCuts power to the elements the moment the lid opens. You are reaching into a 2,200°F chamber with tongs, so this matters.\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"d-section\"\u003e\n  \u003cdiv class=\"d-sh\"\u003eTechnical specifications\u003c\/div\u003e\n  \u003cdiv class=\"d-specs\"\u003e\n    \u003cdiv class=\"d-sr\"\u003e\n\u003cspan class=\"d-sk\"\u003eKiln function\u003c\/span\u003e\u003cspan class=\"d-sv\"\u003eHeat treating steel — normalizing, hardening and tempering\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-sr\"\u003e\n\u003cspan class=\"d-sk\"\u003eBlade length it takes\u003c\/span\u003e\u003cspan class=\"d-sv\"\u003eUp to 38\"\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-sr\"\u003e\n\u003cspan class=\"d-sk\"\u003eInterior width\u003c\/span\u003e\u003cspan class=\"d-sv\"\u003e11\"\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-sr\"\u003e\n\u003cspan class=\"d-sk\"\u003eInterior depth\u003c\/span\u003e\u003cspan class=\"d-sv\"\u003e39\"\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-sr\"\u003e\n\u003cspan class=\"d-sk\"\u003eCubic feet\u003c\/span\u003e\u003cspan class=\"d-sv\"\u003e2.65 cu ft\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-sr\"\u003e\n\u003cspan class=\"d-sk\"\u003eMaximum temperature\u003c\/span\u003e\u003cspan class=\"d-sv\"\u003e2,200°F (1,204°C)\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-sr\"\u003e\n\u003cspan class=\"d-sk\"\u003eVoltage\u003c\/span\u003e\u003cspan class=\"d-sv\"\u003e240V\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-sr\"\u003e\n\u003cspan class=\"d-sk\"\u003eAmperage\u003c\/span\u003e\u003cspan class=\"d-sv\"\u003e33A\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-sr\"\u003e\n\u003cspan class=\"d-sk\"\u003eWattage\u003c\/span\u003e\u003cspan class=\"d-sv\"\u003e7,920W\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-sr\"\u003e\n\u003cspan class=\"d-sk\"\u003ePhase\u003c\/span\u003e\u003cspan class=\"d-sv\"\u003eSingle phase\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-sr\"\u003e\n\u003cspan class=\"d-sk\"\u003ePlug\u003c\/span\u003e\u003cspan class=\"d-sv\"\u003eNEMA 6-50\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-sr\"\u003e\n\u003cspan class=\"d-sk\"\u003eElement placement\u003c\/span\u003e\u003cspan class=\"d-sv\"\u003eSide-fired\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-sr\"\u003e\n\u003cspan class=\"d-sk\"\u003eLoading\u003c\/span\u003e\u003cspan class=\"d-sv\"\u003eTop-loading; blades suspended vertically\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-sr\"\u003e\n\u003cspan class=\"d-sk\"\u003eController\u003c\/span\u003e\u003cspan class=\"d-sv\"\u003eOrton AutoFire AF4X 3-button\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-sr\"\u003e\n\u003cspan class=\"d-sk\"\u003eKiln weight\u003c\/span\u003e\u003cspan class=\"d-sv\"\u003e130 lbs\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-sr\"\u003e\n\u003cspan class=\"d-sk\"\u003eWarranty\u003c\/span\u003e\u003cspan class=\"d-sv\"\u003e2-year limited (Jen-Ken)\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cspan class=\"d-warranty\"\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e Two-year limited warranty from Jen-Ken Kilns to the original purchaser on brick kilns, covering defects in materials and workmanship and limited to repair or replacement of defective items. Elements and thermocouples carry their own two-year coverage; thermocouples are not warranted against breakage. The Orton controller is covered by Orton's own warranty. Keep your proof of purchase. Peach State Pottery is an authorized Jen-Ken dealer.\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"d-section\"\u003e\n  \u003cdiv class=\"d-sh\"\u003eOptional accessories\u003c\/div\u003e\n  \u003cdiv class=\"d-grid2\"\u003e\n    \u003cdiv class=\"d-cell\"\u003e\n\u003cspan class=\"d-cn\"\u003eQuench tank and platform\u003c\/span\u003e\u003cspan class=\"d-cd\"\u003eJen-Ken sells these separately for the taller ovens. If you are hardening rather than only tempering, you need somewhere to put the blade in the two seconds after it leaves the chamber.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-cell\"\u003e\n\u003cspan class=\"d-cn\"\u003eSuspension hardware\u003c\/span\u003e\u003cspan class=\"d-cd\"\u003eBlades hang by pin, spring clasp or ceramic rod. Tell us what you make and we will help you work out what you need to hang it by.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-cell\"\u003e\n\u003cspan class=\"d-cn\"\u003eSpare thermocouple\u003c\/span\u003e\u003cspan class=\"d-cd\"\u003eA thermocouple is a consumable in a furnace that lives at 2,000°F. Worth having one on the shelf before you need it.\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"d-cell\"\u003e\n\u003cspan class=\"d-cn\"\u003eController upgrade\u003c\/span\u003e\u003cspan class=\"d-cd\"\u003eJen-Ken offers other Orton controllers on request. It is a factory option rather than a checkout add-on — call us and we will quote it.\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"d-section\"\u003e\n  \u003cdiv class=\"d-sh\"\u003eCommon questions\u003c\/div\u003e\n  \u003cdiv class=\"d-faq-item\"\u003e\n\u003cspan class=\"d-q\"\u003eWhy hang the blade instead of laying it flat?\u003c\/span\u003e\u003cspan class=\"d-a\"\u003eA blade lying flat on a shelf touches something, and everywhere it touches cools differently from everywhere it does not. That is where warp and decarb patterns come from. In an air bath the blade hangs from the top of a tall chamber — by a pin, a spring clasp or a ceramic rod — and nothing is in contact with the steel while it soaks. Heat reaches it from every side at once, tip to tang. It is the same argument a front-loading oven cannot make.\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"d-faq-item\"\u003e\n\u003cspan class=\"d-q\"\u003eWhat electrical circuit does it need?\u003c\/span\u003e\u003cspan class=\"d-a\"\u003eJen-Ken publishes the voltage, the draw, the wattage and the plug for the knife line and nothing else — no breaker size, no circuit wire gauge and no shipping method appear on any of these spec tables. We have not filled those rows in by working them out or by borrowing them from a pottery kiln of similar draw, because a number we invented is exactly the sort of thing an electrician would act on. Size the circuit to the continuous draw with a licensed electrician, and call us — we are asking Jen-Ken for the factory figures.\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"d-faq-item\"\u003e\n\u003cspan class=\"d-q\"\u003eWhat does the “+9” mean?\u003c\/span\u003e\u003cspan class=\"d-a\"\u003eA 30-inch base chamber plus a 9-inch extension section, giving 39 inches of depth. It is built as two pieces that separate, which is a practical point rather than a marketing one — a single 39-inch furnace body is awkward to move and this one is not.\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"d-faq-item\"\u003e\n\u003cspan class=\"d-q\"\u003eWhy is there no shipping weight?\u003c\/span\u003e\u003cspan class=\"d-a\"\u003eJen-Ken does not publish one for this model. The oven itself is 130 lbs. We have banded it for freight on the assumption that it ships like the comparable ovens in the line rather than guessing at a crate weight, and if you want the exact figure before you book a delivery, call us and we will get it from the factory.\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"d-faq-item\"\u003e\n\u003cspan class=\"d-q\"\u003eHow uniform is the temperature, in numbers?\u003c\/span\u003e\u003cspan class=\"d-a\"\u003eJen-Ken describes this oven as giving 360° heat, and that is a fair description of the geometry — a hanging blade is surrounded by chamber on every side. It is not a measured specification, though. Nobody in the heat-treating oven category publishes a temperature uniformity figure in °F, Jen-Ken included, so we are not going to print one either. If you need a documented uniformity survey for a certification, tell us and we will take the question to the factory.\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"d-faq-item\"\u003e\n\u003cspan class=\"d-q\"\u003eWill it do stainless as well as carbon steel?\u003c\/span\u003e\u003cspan class=\"d-a\"\u003e2,200°F covers the austenitizing range for the carbon and tool steels most knifemakers use, and reaches into the range for the common air-hardening stainless grades. Jen-Ken publishes the ceiling and not a steel list, so check your steel's data sheet against 2,200°F rather than taking our word for it.\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"d-faq-item\"\u003e\n\u003cspan class=\"d-q\"\u003eHow long until it ships?\u003c\/span\u003e\u003cspan class=\"d-a\"\u003eJen-Ken builds to order in Lakeland, Florida. Their own guidance is that kilns can take several weeks to months depending on the production queue. Call us and we will get you the current estimate before you commit.\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"d-faq-item\"\u003e\n\u003cspan class=\"d-q\"\u003eDoes buying from Peach State Pottery affect my warranty?\u003c\/span\u003e\u003cspan class=\"d-a\"\u003eNo. We are an authorized Jen-Ken dealer, so the factory two-year warranty applies exactly as it would buying direct. Keep your proof of purchase.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"d-cta\"\u003e\n  \u003cdiv\u003e\n    \u003cspan class=\"d-cta-title\"\u003eLonger than a 30 and shorter than a sword.\u003c\/span\u003e\n    \u003cspan class=\"d-cta-sub\"\u003eWe are authorized Jen-Ken dealers based in Georgia. Thirty-eight inches covers most longsword and machete work. Call us with your longest blade and we will tell you whether this or the Excalibur is the right buy.\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003ca href=\"https:\/\/peachstatepottery.com\/pages\/contact-us\" class=\"d-cta-link\"\u003eTalk to an expert →\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Jen-Ken","offers":[{"title":"Default Title","offer_id":49691660681371,"sku":"JENKEN-VAB-30-9","price":3140.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/7160\/9243\/files\/Jen-Ken-Kilns_Vertical-Air-Bath_30_9_2-pieces.jpg?v=1790791317","url":"https:\/\/peachstatepottery.com\/products\/jen-ken-vertical-air-bath-30-9-knife-kiln","provider":"Peach State Pottery","version":"1.0","type":"link"}