A fi irin ìpele orisun omi ti o ga julọ ṣe ideri sprial sprial sprial naa, a si fi ooru tọju rẹ̀ lati daabobo skru bọọlu naa, ọpa ati awọn ẹya ọpa. A ko fi ọwọ kan apa aabo naa pẹlu apa aabo naa nipasẹ flange aarin ti a gbe sori awọn opin mejeeji ti ẹya aabo naa. A le rii aabo asopọ laarin apa aabo naa ati flange aarin nipasẹ agbara rirọ ti o ti ṣe ṣaaju titẹ, nitorinaa o duro ṣinṣin ni iṣiṣẹ, o rọ ati rirọ, o si ni ariwo ti o kere pupọ. Oju naa dudu ati didan, o si darapọ mọ ọpọlọpọ awọn ẹya flange lori ẹrọ naa.
Aṣọ ìdáàbòbò bẹ́líìtì irin oníyípo ni a ṣe àtúnṣe rẹ̀ gẹ́gẹ́ bí àwọn pàrámítà bíi ìwọ̀n ìlà-oòrùn skru bọ́ọ̀lù, ọ̀pá àti àwọn ẹ̀yà ọ̀pá, àti ìjìnnà ìṣípo. Nítorí náà, a ń lo àwọn ọ̀nà wọ̀nyí nígbà tí a bá ń pàṣẹ:
1. A yan awọn olumulo gẹgẹbi awọn alaye boṣewa ti ile-iṣẹ wa pese.
2.Àwọn olùlò pèsè àpò ààbò D, Lmax, Lmin (àbéèrè pàtàkì D2)
Ilé iṣẹ́ wa ló ṣe àgbékalẹ̀ rẹ̀, iye owó náà sì ni a ṣírò gẹ́gẹ́ bí ìlànà tó wà ní ìpele tó yẹ.
1. Olùlò ló ṣe flange ti ideri irin onígun mẹ́rin. Ilé iṣẹ́ wa ń pèsè àwọn àwòrán.
2. Iye owo aṣẹ pupọ yoo ni ẹdinwo
3.D2 kò pọndandan ayafi fun awọn iwọn apoti pataki.
| Àwọn ìlànà pàtó | Lmax(mm) | Lmin (mm) | D1 (mm) | D2 (mm) | Àwọn ìlànà pàtó | Lmax(mm) | Lmin (mm) | D1 (mm) | D2 (mm) |
| 20-250-30 | 250 | 30 | 20 | 40 | 70-400-80 | 400 | 80 | 70 | 95 |
| 30-250-45 | 250 | 45 | 3 | 41 | 70-750-100 | 750 | 100 | 70 | 94 |
| 30-450-50 | 450 | 50 | 030 | 50 | 70-1400-120 | 1400 | 120 | 70 | 104 |
| 30-600-50 | 660 | 50 | 30 | 56 | 70-1800-120 | 1800 | 120 | 70 | 120 |
| 40-300-45 | 300 | 45 | 40 | 54 | 75-400-80 | 400 | 80 | 75 | 89 |
| 40-550-50 | 550 | 50 | 40 | 67 | 75-600-100 | 600 | 100 | 75 | 95 |
| 40-800-80 | 800 | 80 | 40 | 65 | 75-900-120 | 900 | 120 | 75 | 97 |
| 40-950-80 | 950 | 80 | 40 | 69 | 75-1200-120 | 1200 | 120 | 75 | 104 |
| 50-550-50 | 550 | 50 | 45 | 73 | 75-1600-1100 | 1600 | 110 | 75 | 115 |
| 45-700-80 | 700 | 80 | 45 | 68 | 80-400-80 | 400 | 80 | 80 | 94 |
| 45-900-100 | 900 | 100 | 45 | 70 | 80-600-120 | 600 | 120 | 80 | 97 |
| 45-1000-100 | 1000 | 100 | 45 | 73 | 80-900-110 | 900 | 110 | 80 | 105 |
| 50-500-50 | 500 | 50 | 50 | 72 | 80-1200-120 | 1200 | 120 | 80 | 115 |
| 50-700-80 | 700 | 80 | 50 | 70 | 80-1400-120 | 1400 | 120 | 80 | 120 |
| 50-900-100 | 900 | 100 | 50 | 77 | 85-400-80 | 400 | 80 | 85 | 100 |
| 45-1200-100 | 1200 | 100 | 50 | 84 | 85-600-100 | 600 | 100 | 85 | 105 |
| 55-350-50 | 350 | 50 | 50 | 72 | 85-800-125 | 800 | 125 | 85 | 106 |
| 55-550-80 | 550 | 80 | 55 | 72 | 85-1000-125 | 1000 | 125 | 85 | 126 |
| 55-800-80 | 800 | 80 | 55 | 78 | 85-1200-125 | 1200 | 125 | 85 | 132 |
| 55-1000-120 | 1000 | 120 | 55 | 77 | 90-400-100 | 400 | 100 | 90 | 105 |
| 55-1400-110 | 1400 | 110 | 55 | 86 | 90-600-100 | 600 | 100 | 90 | 111 |
| 60-400-50 | 400 | 50 | 60 | 79 | 90-800-125 | 800 | 125 | 90 | 111 |
| 60-600-80 | 600 | 80 | 60 | 78 | 90-900-125 | 900 | 125 | 90 | 127 |
| 60-900-100 | 900 | 100 | 60 | 87 | 90-1200-125 | 1200 | 125 | 90 | 137 |
| 60-1200-120 | 1200 | 120 | 60 | 88 | 95-400-100 | 400 | 100 | 95 | 110 |
| 60-1600-120 | 1600 | 120 | 60 | 98 | 95-600-125 | 600 | 125 | 95 | 112 |
| 65-400-50 | 400 | 0 | 65 | 85 | 95-800-125 | 800 | 125 | 95 | 130 |
| 65-700-80 | 700 | 80 | 65 | 87 | 95-1000-125 | 1000 | 125 | 95 | 137 |
| 65-1000-100 | 1000 | 100 | 65 | 95 | 100-600-120 | 600 | 125 | 100 | 118 |
| 65-1400-110 | 1400 | 110 | 65 | 99 | 100-800-120 | 800 | 120 | 100 | 135 |
| 65-1800-110 | 1800 | 110 | 65 | 109 | 120-600-125 | 600 | 125 | 120 | 150 |