Kamfanin Zhongshan Rizda Castor Manufacturing Co., Ltd. Yana cikin birnin Zhongshan, lardin Guangdong, ɗaya daga cikin biranen tsakiyar Pearl River Delta, wanda ya mamaye yanki mai faɗin murabba'in mita 10000. Kamfanin ƙwararre ne wajen kera ƙafafun da na'urorin Castors don samar wa abokan ciniki nau'ikan samfura iri-iri, nau'ikan da salon su. Kamfanin da ya gabaci kamfanin shine BiaoShun Hardware Factory, wanda aka kafa a shekarar 2008, wanda ya shafe shekaru 15 yana da ƙwarewar samarwa da kerawa.
Tayar roba ta tsakiya ta aluminum tana da ƙarfin ɗaukar nauyi mai yawa, juriya ga lalacewa, juriya ga tasiri, juriya ga lalata sinadarai da kuma juriya ga zafi, kuma ana amfani da ita sosai a masana'antu. Bugu da ƙari, an naɗe matattarar waje ta ƙafafun da roba, wanda ke da kyakkyawan tasirin rage hayaniya. Akwai ƙananan ƙwallan ƙarfe da yawa a kusa da tsakiyar shaft a cikin bearing ɗin ƙwallon biyu, don haka gogayya ƙarama ce kuma babu ɗigon mai.
1. Kyakkyawan juriyar juriya da kuma ƙarfin juriya mafi girma.
2. Ba shi da sauƙin tsatsa a tsakiyar aluminum kuma yana da kyakkyawan juriya.
3. Kyakkyawan rufin lantarki, juriya ga skid, juriya ga lalacewa, juriya ga yanayi da kuma sinadarai na yau da kullun.
4. Launi mai laushi zai iya rage hayaniya yadda ya kamata a yi amfani da shi.
5. Kyakkyawan halayen injiniya masu ƙarfi.
6. Bearing mai ƙwallo biyu yana da tsawon rai da kuma kyakkyawan aiki na hana tsufa.
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| Diamita na Taya | Loda | Aksali | Maƙallin | Loda | Girman Farantin Sama | Tazarar Ramin Bolt | Diamita na ramin ƙulli | Buɗewa | Number na Samfura |
| 80*32 | 120 | / | 2.5 | 108 | 105*80 | 80*60 | 11*9 | 42 | R1-080R-622 |
| 100*32 | 150 | / | 2.5 | 128 | 105*80 | 80*60 | 11*9 | 42 | R1-100R-622 |
| 125*40 | 180 | / | 2.5 | 155 | 105*80 | 80*60 | 11*9 | 52 | R1-125R-622 |
| 160*50 | 250 | / | 3.0 | 190 | 135*110 | 105*80 | 13.5*11 | 62 | R1-160R-622 |
| 200*50 | 300 | / | 3.0 | 235 | 135*110 | 105*80 | 13.5*11 | 62 | R1-200R-622 |