Linear Guide Blocks
Blocks that run on a profiled rail: the HGH and HGW precision linear guide series, for machine and automation axes that need stiffness as well as travel.
Linear guide blocks · HGH and HGW series · rail-mounted
Blocks on a rail, not bushings on a shaft
A guide block system splits the linear bearing into two parts: a profiled rail that bolts to the machine bed, and a block with recirculating balls that runs on the rail's ground faces. The result carries load in every direction including moment load, which a shaft bushing cannot, and it is the standard architecture of machine-tool and automation axes. The line in this range is the HGH and HGW block series — one of the range's established lines.
| Block series | Form in the system |
|---|---|
| HGH | High-profile square-rail block series |
| HGW | Wide-rail flanged block series |
Where guide blocks are specified
The positions that specify rail guides are the ones where the moving part must not twist: CNC machine axes, cutting and engraving gantries, precision stages, pick-and-place automation and inspection equipment. In those positions the rail defines the straightness and the block count defines the stiffness, so a guide order is normally written as rails plus blocks per axis rather than as loose bearings. The looser, cheaper architecture — bushings on a round shaft — serves lighter axes, and where each belongs is worked through in the blog comparison.
Blocks, rails and counts
A guide block inquiry has three quantities, not one: the blocks per rail, the rails per axis, and the axes per machine. It also has two scope questions: whether rails are part of the order or only blocks, and whether blocks are ordered as replacements against an existing rail system — replacement blocks must match the rail series already installed, which makes the installed series a specification point. State all of it in the inquiry; a block count without a rail statement is the standing ambiguity of this family. Rail length belongs in the same conversation: rails ordered long and cut on site are a different delivery from rails cut to the axis length before dispatch, and the list should say which.
Specifying a guide block order
Name the series — HGH or HGW — the size, and the three counts. Add the rail length per axis where rails are included, and the installed series where blocks are replacements. Preload and accuracy points follow the machine design; where the design names them, carry them into the inquiry verbatim rather than translating them into general words, because the same English word covers different grades in different systems.
Blocks and rails wear as a pair, so replacements are ordered against the rail already installed: name the rail series and size with the block, and say whether the rail itself is also being replaced. A block supplied for the wrong rail series fits nothing, and the check costs one line in the inquiry.
Send an inquiry
Name the HGH or HGW series, size and block counts per axis for your guide order, with rail scope and the destination market, through the inquiry form.