He aha ka nui o ka pūnāwai e pono ai iaʻu no kaʻu puka hale kaʻa?

Your garage door spring snapped, and the door is incredibly heavy. You need to order a replacement, but the wrong size could damage your door or be dangerously unsafe.

To find the correct spring size, you must get three measurements from your old, pūnāwai haki: ke anawaena uwea, ke anawaena o loko o ka wili, and the overall length of the spring. These measurements, along with the door's weight, determine the required lifting power.

In my years of manufacturing springs, the biggest problems always come from incorrect sizing. It’s not just about making the door go up and down. A spring that's too strong will make the door hard to close and can damage the top panel. A spring that's too weak will burn out your electric opener in a matter of months. Precision is everything. Before you even think about ordering a part, pono ʻoe e lilo i mea akamai i ke ana ʻana i kāu mea i loaʻa. Let's walk through exactly how it's done.

Pehea ʻoe e ana pono ai i kahi pūnāwai Torsion?

Aia ka pūnāwai haki i mua ou, akā pehea ʻoe e loaʻa ai nā helu pololei? Hiki i kahi hewa liʻiliʻi i kāu ana ke alakaʻi i ke kauoha ʻana i kahi ʻāpana hewa loa, hoopau manawa a me ke kala.

Ka mua, e paʻa ka puka a wehe ʻia ka mea wehe. A laila, ana i ke anawaena uwea, the inside diameter, a me ka lōʻihi holoʻokoʻa[^1] o na wili o kekahi o na apana naha. Pono ʻoe e hoʻoholo i ka kuhikuhi makani[^ 2] (makani hema a ʻākau paha).

I can't stress this enough: Pono pono nā ana. Ua loaʻa iaʻu kekahi ʻenehana hou i loko o kā mākou hale hana maikaʻi i hoʻopau ʻia e kahi hapa liʻiliʻi o ka ʻīniha ma ke ana anawaena uea.. Ua ʻae ʻo ia i nā pūnāwai holoʻokoʻa ma muli o kēlā kuhi hewa. We had to scrap the entire order because we knew they wouldn't balance the customer's doors correctly. Hiki i kahi hapa liʻiliʻi ke kumu i ka pilikia nui i ka ʻōnaehana hope. Pela no ka puka hale kaa. ʻO ka lawe ʻana i kou manawa e kiʻi pololei i kēia mau kikoʻī ʻehā ʻo ia ka hana koʻikoʻi i ka hana holoʻokoʻa.

Na Ana Ko'iko'i Eha

E kauoha i ka puna pono, pono ʻoe i ʻehā ʻāpana ʻike. For safety, e ana mau me na punawai hemo loa (ʻAʻole tension[^ 3]).

• 1. ʻO ka helu holoi: ʻO kēia ka mānoanoa o ka uwea puna ponoʻī. He mea paʻakikī ke ana pono i ka uwea hoʻokahi me ke ana lipine. ʻO ke ala maikaʻi loa ke ana 10 wili a puunaue i kela helu me 10. ʻo kahi laʻana, if 10 coils measure 2.5 iniha, kou anawaena uwea[^4] ʻo ia 0.250 iniha.
• 2. Inside Diameter: ʻO kēia ke anawaena o ka puka i waenakonu o ka pūnāwai. ʻO ka maʻamau ka nui maʻamau, like 1.75 iniha a i ole 2 iniha. Hiki iā ʻoe ke ana pololei i kēia ma ka puka.
• 3. Ka lōʻihi holoʻokoʻa: E ana i ka lōʻihi o ka pūnāwai mai kekahi ʻaoʻao o nā ʻōwili a i kekahi. Mai hookomo i na cones wili ma na welau ma keia ana.
• 4. Kuhikuhi makani: E nana i ka hope o ka puna. Inā kuhikuhi ka hope o ke kaula i ka ʻākau, he makani akau. Inā kuhikuhi i ka hema, he makani lima hema. ʻO ka hapa nui o nā puka he hoʻokahi o kēlā me kēia.

Pehea inā nalo ka Puna Kahiko a i ʻole ka nui hewa?

The old spring is gone, a i ʻole ʻoe manaʻo he hewa ia no ka mea ʻaʻole i hana pololei ka puka. I kēia manawa ʻaʻohe āu mea e ana. ʻO ka manaʻo ʻana i ka nui he mea ʻai no ka pōʻino.

Ina aohe puna e ana, pono ʻoe e hoʻoholo i ka nui kūpono ma ke kaupaona ʻana i ka puka hale kaʻa. This involves using scales to find the door's exact weight, a laila hoʻohana ʻia i loko o kahi ʻano me ke kiʻekiʻe o ka puka a me ka nui o ka pahu e helu ai i ka hoʻokiʻekiʻe puna e pono ai.

ʻO kēia kahi kahi aʻu e ʻōlelo ikaika ai e kāhea i kahi ʻoihana. Ua hoʻolako mākou i nā pūnāwai no nā mea hana puka maʻamau e pono ai i kahi counterbalance kūpono no kahi hoʻolālā hou. ʻO ka mea mua a kā lākou poʻe ʻenekinia e helu ai i ke kaumaha pololei o ka panela puka. From there, we can determine the "Inch Pounds Per Turn" a i ʻole IPPT[^5], which is the technical term for the spring's lifting power. It's a calculation that also involves the radius of the cable drums and the height of the door. A professional technician can weigh your door safely and has the charts to convert that weight into the perfect spring size.

Calculating the Required Lift

When you can't measure, you have to calculate from scratch.

• Door Weight is King: The entire purpose of the spring is to make a heavy door feel weightless. A standard two-car garage door can weigh over 300 paona. The spring must be sized to counteract that specific weight.
• The Role of Drums and Height: The size of the cable drums (the pulleys the lift cables wrap around) and the height of the door also affect the calculation. Pono nā pahu nui i kahi pūnāwai ikaika e hāʻawi i ka nui o ka hāpai ʻana. Pono nā puka kiʻekiʻe e paʻa i ka pūnāwai tension[^ 3] ma o na huli hou aku.
• IPPT[^5] Heluhelu: Hoʻohana ka poʻe loea i kēia mau mea (kaumaha, nui pahu, kiʻekiʻe o ka puka) e helu i ka pono IPPT[^5]. Kuhi ʻia kēlā me kēia puna no kahi kikoʻī IPPT[^5]. This ensures the new spring is a perfect match for the door's physics, ʻaʻole wale he kope o kahi ʻāpana kahiko hewa paha.

Hoʻololi anei ka hoʻomaikaʻi ʻana i kahi puna wai kiʻekiʻe i ka nui?

Me he mea lā ua haki kou pūnāwai i kēlā me kēia mau makahiki. You want a longer-lasting option but worry a different spring won't fit. E hoʻonui ʻia" e like ka nui o ka puna me ke kumu?

ʻAʻole, ʻaʻole e like ka nui o ka punawai kiʻekiʻe. E hoʻokō i ke ola lōʻihi, Pono e hana ʻia ka pūnāwai mai kahi uea mānoanoa iki a ʻike ʻia ka lōʻihi. Hoʻemi kēia hoʻolālā i ke koʻikoʻi o ke kila me kēlā me kēia hoʻohana, hoonui loa i kona ola.

As a manufacturer, ʻo kēia kahi a mākou e hoʻohui ai i ka waiwai nui no kā mākou mea kūʻai aku ʻoihana. Noi pinepine lākou i nā pūnāwai no nā waiwai ʻoihana e pono e mau 50,000 nā pōʻaiapuni, not the standard 10,000. We don't just use a magical type of steel; hana hou mākou i ka puna. Hoʻohana mākou i kahi anawaena uwea nui aʻe a hoʻohui i nā wili, ka mea e loihi ai ka puna. Hāʻawi kēia hoʻolālā hou i ka mana hāpai like (IPPT[^5]) as the original, akā, hana ia me ka liʻiliʻi o ke koʻikoʻi i ka mea. ʻO ke koʻikoʻi liʻiliʻi ke ʻano o ke ola lōʻihi. The key is that the performance is identical, aka, o ka physical dimensions are different.

ʻEnekinia no ke ola lōʻihi

ʻO ka hoʻonui ʻana e pili ana i ka hōʻemi ʻana i ke kaumaha.

• Stress and Cycle Life: I kēlā me kēia manawa e wehe a pani kou puka, wili ka uwea puna, hana kaumaha. Ua holo ʻoi aʻe ka manawa, ʻO kēia koʻikoʻi ka mea e luhi ai ka metala a haki. Hoʻolālā ʻia kahi pūnāwai maʻamau e mālama i kēia no kahi 10,000 nā pōʻaiapuni.
• ʻO ka hoʻonā kiʻekiʻe: Me ka hoʻohana ʻana i kahi pūnāwai lōʻihi i hana ʻia me kahi uea mānoanoa iki, hiki iā mākou ke hana i ka ikaika hāpai like me ka hana liʻiliʻi. ʻO ke kino lōʻihi e puʻunaue i ke koʻikoʻi ma luna o nā mea hou aku. ʻO kēia koʻikoʻi hana haʻahaʻa, ʻo ia ka mea hiki i ka puna ke kū i nā pōʻai he nui ma mua o ka hiki ʻana i kona palena luhi. Hiki ke hoʻomau i kahi pūnāwai kiʻekiʻe i hoʻolālā pono ʻia 25,000, 50,000, a i ʻole 100,000 nā pōʻaiapuni.

Hopena

Ka nui a puna puka hale kaʻa[^6] koi pololei. Measure the old spring's dimensions carefully, or if it's missing, e loaʻa i kahi loea e kaupaona i ka puka e hōʻoia i kahi kūpono palekana a kaulike.

[^1]: He mea koʻikoʻi ke ana ʻana i ka lōʻihi holoʻokoʻa no ka hoʻokomo pono ʻana i ka punawai. E ʻike i nā hana maikaʻi loa no kēia ana.
[^ 2]: Pili ka makani i ka hana puna a me ka palekana. E aʻo pehea e ʻike ai no ka hoʻokomo pono ʻana.
[^ 3]: ʻO ke ana ʻana me ka ʻole o ka haʻalulu e hōʻoia i ka palekana a me ka pololei. E aʻo i ke kumu he koʻikoʻi kēia ʻanuʻu i ka hana.
[^4]: Pono ke ana pololei o ke anawaena uwea no ka hana puna. E aʻo i nā ʻenehana maikaʻi loa e pale aku i nā kuhi hewa.
[^5]: He mea koʻikoʻi ka IPPT no ka hoʻomaopopo ʻana i ka mana hāpai puna. E ʻike i kona koʻikoʻi i ke koho puna.
[^6]: He mea koʻikoʻi ke koho ʻana i ka puna puka kaʻa kūpono no ka palekana a me ka hana. E ʻimi i nā ʻōlelo aʻoaʻo loea e hōʻoia i kāu koho pono ʻana.