THKSeparate Type LM Guide Assembly, Two Carriage Blocks on a 440 mm Rail, High Accuracy Grade, User-Adjustable Running Clearance

Product Description

What this part is

THK Separate Type LM Guide assembly, marked 2HR306RUU+440LH. Model: HR, full-ball Separate Type. Size: HR3065. Configuration: two carriage blocks with UU end seals on a 440 mm LM rail. Accuracy Grade: H, high accuracy. Section Height M: 30 mm. Assembly Width W0: 65 mm. Contact Angle: 45°. Rolling Elements: two rows of balls per rail, full complement retained by retainer plates.

What the HR series does

Model HR takes equal load in all four directions with two rails installed in parallel, keeps a low cross-sectional height, and has adjustable running clearance. Clearance is set at assembly by the positioning of the two parallel rails: tighter for rigidity, looser to suit a structure held to wider tolerances. A THK HR set is a combination of two LM rails and their LM blocks used on the same plane, and four-way equal load comes from that paired arrangement. Clearance adjustment on an HR is simpler and holds accuracy better than on a cross-roller guide.

Published HR3065 data

Section Height M: 30 mm. Block Width W: 40.3 mm. Assembly Width W0: 65 mm. Block Length L with UU seals: 145 mm. Block Body Length L1: 90 mm. Bolt Span C: 50 mm. Block Taps: 2 x M10, mountable from the top surface and the bottom surface. Rail W1: 25 mm. Rail W4: 12 mm. Rail M1: 22.5 mm. Rail Hole Pitch F: 80 mm. Rail Mounting Hole: 9 x 14 x 12 mm for M8.

Basic Dynamic Load Rating C: 42.6 kN. Basic Static Load Rating C0: 44.4 kN. Static Permissible Moment MA: 1.27 kN·m for one block, 7.71 kN·m for two blocks. Static Permissible Moment MB: 1.27 kN·m for one block, 7.71 kN·m for two blocks. Block Mass: 0.7 kg. Rail Mass: 4.6 kg/m. Maximum Rail Length: 3000 mm. Service Temperature: −20°C to 80°C. Accuracy Grades Offered: Normal, H, P, SP, UP. LaCS lubrication and condition sensor is available for the size.

Decoding the designation

Leading 2: the number of LM blocks used on the same rail, which THK places before the model number on Separate Type designations. Two blocks. HR: Separate Type full-ball LM Guide with adjustable clearance. 3065: section height M 30 mm and assembly width W0 65 mm. UU: end seals fitted both ends; SS adds a side seal and DD is double seals. +440L: a 440 mm LM rail supplied with the blocks. H: high accuracy grade.

Quantity and configuration

Unit Quantity: 1 assembly — two LM blocks and one 440 mm LM rail.

Interchange guidance

Searchable variants of this designation: 2HR306RUU+440LH, 2HR306RUU, HR306R, 2HR3065UU+440L, HR3065, HR3065UU, HR-3065, HR 306R UU. Related THK sizes and variants: HR3065T heavy-load type, HR3065M stainless, HR2555, HR3575. Sibling THK series with factory-set preload: HSR30, SR30. Central Surplus also stocks THK HSR25CA, HSR30CA, HSR30B, SR35W and SHW21CA blocks.