• Model NO.：28"
• Trenchless：HDD
• Hole Opener：28" Hole Opener
• Transport Package：Plywood Box or Metal Support
• Specification：28′′
• Trademark：RLK
• Origin：Make in China
• HS Code：8412291000
• Production Capacity：200

Basic Info.

Model NO. 28" Trenchless HDD Hole Opener 28" Hole Opener Transport Package Plywood Box or Metal Support Specification 28′′ Trademark RLK Origin Make in China HS Code 8412291000 Production Capacity 200

Product Description

We manufacture mill tooth backreamers and insert tooth backreamers with short lead time. According to the characteristics of HDD machine and different formation conditions, choose proper tooth shape, bearing structure, sealing form and inclination of palm back. Hydraulic cutting, smooth sand discharge, effectively reduce the accumulation of rock and sand, cone body adopts hot compress anti-abrasive gold, reduce wear and tear, unique anti-stripping design, to avoid roller bearing damaged, the roller falling off in the hole as to causing accident. Guarantee of welding process to prevent overheat to damage roller seal and bearing. The drill body adopts spiral design, with good straightening and slagging effect, reduces repeated rock breaking by roller, and improves reaming speed. (the underreamer between 220mm-1600mm diameter be bespeak as order).

28" underreamer parameter

Thread Both Ends

Shaft Diameter

Palm Size

Tooth Shape

Seal Type

NC46	¢168	8-1/2",	Milled tooth or Inserted tooth	Metal Seal or Rubber Seal
NC50	¢178	9-1/2",	Milled tooth or Inserted tooth	Metal Seal or Rubber Seal
5-1/2'' FH	¢195	12-1/4",	Milled tooth or Inserted tooth	Metal Seal or Rubber Seal
6-5/8''FH	¢205	13-5/8"	Milled tooth or Inserted tooth	Metal Seal or Rubber Seal

normal tooth type:
127-136(steel tooth or milling tooth )
517-537-617-637(inserted tooth)


The Picture of Product in jobsite


The Picture of Material

Shaft


Roller/Palm



The Picture of Workshop

Threading




Welding




The Picture of My Factory