Hydraulic Bumpers (Buffers)
The Hydraulic Bumper/Buffer Solution for Cranes & Transfer Cars
With the increased travel speeds of today’s container STS cranes, automated overhead and gantry cranes as well as high speed transfer cars, the need for energy absorbing GANTREX®/Oleo hydraulic bumpers (buffers) is greater than ever. Featuring a fatigueless gas return spring and the most efficient metering pin system available, the GANTREX®/Oleo hydraulic bumper has become the best way to stop rail-mounted material handling equipment.

GANTREX® supplies bumpers/buffers from Oleo International, designed for the harshest of heavy duty applications. GANTREX® selects bumpers for your application based on many years of technical expertise. GANTREX®/Oleo hydraulic bumpers conform to the comprehensive AIST Technical Report #6 and other worldwide standards for energy absorption/dissipation based on 100% speed.
No matter the crane size or travel speed, GANTREX® can design a solution to provide all the protection needed to bring rail-mounted equipment to a controlled stop while minimizing the end forces resultant from impact.
Because there is no mechanical return spring to fail, the GANTREX®/Oleo bumper is the easiest bumper to inspect. Any damage or failure to the seals and a leak in either oil or air, and the bumper head will not return to the ready position. Visual inspection eliminates false indications of readiness.

GANTREX® also supplies a line of hydraulic bumpers for smaller cranes, known as the GCB Series. Click below for more information.
Click the link below to watch a video about hydraulic bumpers:
Gantrex/Oleo Hydraulic Bumpers
Depending on your location, this product is referred to as either Hydraulic Buffers or Bumpers. The product is the same, however, we have categorized the data sheets below in the terminology you are familiar with for your ease.
Click below for individual bumper data sheets and technical information in pdf format:
- Hydraulic Buffers Introduction
- Hydraulic Buffers Type 4
- Hydraulic Buffers Type 9-23
- Hydraulic Buffers Type 15-24
- Hydraulic Buffers Type 21
- Hydraulic Buffers Type 50
- Hydraulic Buffers Type 70
- Hydraulic Buffers Type 700
Hydraulic Buffers
- Hydraulic Crane Bumpers Introduction
- Bumpers Application Data Sheets
- Bumper Sizing Codes and Calculations
- Bumper Mounting Brackets Options
- Oleo Bumper Product Data Sheets:
- Oleo Storm Bumpers
- Oleo Type 110
- Oleo Type 200
- Gantrex Small Hydraulic Bumper Series
- Featured Article:
Hydraulic Bumpers for the Protection of Buildings, Cranes and Operators From Impact Damage, by Paul G. Kit. Presented at the 1996 Fall AISE Convention, Subcommittee # 13: Design and Construction of Mill Buildings
