Good-quality LM10UU linear ball bearings with remarkable accuracy and rigidity are for sale. These types of linear bearings are of standard construction while adjustable types are designed with grooves for circlip which can be used for mounting to the housing. These linear motion bearings are widely used in different linear motion applications and more commonly seen in Asia and other countries.
Specifications

Nominal shaft diameter | Resin retainer | dr |
LM…UU | Ball circuit | Weight | LM…UU-AJ | Ball circuit | Weight | LM…UU-OP | Ball circuit | Weight | mm | Tolerance |
Precision | High |
8mm | LM8UU | 4 | 15g | LM8UU-AJ | 4 | 14.7g | - | - | - | 8 | 0 -6μm | 0 -9μm |
10mm | LM10UU | 4 | 29.5g | LM10UU-AJ | 4 | 29g | LM10UU-OP | 3 | 23g | 10 |
12mm | LM12UU | 4 | 31.5g | LM12UU-AJ | 4 | 31g | LM12UU-OP | 3 | 25g | 12 |
16mm | LM16UU | 5 | 69g | LM16UU-AJ | 5 | 68g | LM16UU-OP | 4 | 52g | 16 |
20mm | LM20UU | 5 | 87g | LM20UU-AJ | 5 | 85g | LM20UU-OP | 4 | 69g | 20 | 0 -7μm | 0 -10μm |
25mm | LM25UU | 6 | 220g | LM25UU-AJ | 6 | 216g | LM25UU-OP | 5 | 188g | 25 |
30mm | LM30UU | 6 | 250g | LM30UU-AJ | 6 | 245g | LM30UU-OP | 5 | 210g | 30 |
35mm | LM35UU | 6 | 390g | LM35UU-AJ | 6 | 384g | LM35UU-OP | 5 | 335g | 35 | 0 -8μm | 0 -12μm |
40mm | LM40UU | 6 | 585g | LM40UU-AJ | 6 | 579g | LM40UU-OP | 5 | 500g | 40 |
50mm | LM50UU | 6 | 1580g | LM50UU-AJ | 6 | 1560g | LM50UU-OP | 5 | 1340g | 50 |
60mm | LM60UU | 6 | 1860g | LM60UU-AJ | 6 | 1820g | LM60UU-OP | 5 | 1610g | 60 | 0 -9μm | 0 -15μm |
Major dimensions and tolerance | Eccentricity | Radial clearance (Max) | Basic load rating |
D | L | B | W | D1 | h | h1 | θ |
mm | Tolerance | mm | Tolerance | mm | Tolerance | Precision | High | Dynamic | Static |
15 | 0 -11μm | 24 | 0 -200μm | 17.5 | 0 -200μm | 1.1mm | 14.3mm | 1mm | - | - | 8μm | 12μm | -3μm | 274c N | 392co N |
19 | 0 -13μm | 29 | 22 | 1.3mm | 18mm | 1mm | 6.8mm | 80° | -4μm | 372c N | 549co N |
21 | 30 | 23 | 1.3mm | 20mm | 1.5mm | 8mm | 80° | 510c N | 784co N |
28 | 37 | 26.5 | 1.6mm | 27mm | 1.5mm | 11mm | 80° | -6μm | 774c N | 1180co N |
32 | 0 -16μm | 42 | 30.5 | 1.6mm | 30.5mm | 1.5mm | 11mm | 60° | 10μm | 15μm | 882c N | 1370co N |
40 | 59 | 0 -300μm | 41 | 0 -300μm | 1.85mm | 38mm | 2mm | 12mm | 50° | 980c N | 1570co N |
45 | 64 | 44.5 | 1.85mm | 43mm | 2.5mm | 15mm | 50° | -8μm | 1570c N | 2740co N |
52 | 0 -19μm | 70 | 49.5 | 2.1mm | 49mm | 2.5mm | 17mm | 50° | 12μm | 20μm | 1670c N | 3140co N |
60 | 80 | 60.5 | 2.1mm | 57mm | 3mm | 20mm | 50° | -10μm | 2160c N | 4020co N |
80 | 100 | 74 | 2.6mm | 76.5mm | 3mm | 25mm | 50° | -13μm | 3820c N | 7940co N |
90 | 0 -22μm | 110 | 85 | 3.15mm | 86.5mm | 3mm | 30mm | 50° | 17μm | 25μm | 4700c N | 10000co N |

Nominal shaft diameter | LN…LUU | Ball circuit | Major dimensions and tolerance |
dr | D | L | B | W | D1 |
mm | Tolerance | mm | Tolerance | mm | Tolerance | mm | Tolerance |
8mm | LM8LUU | 4 | 8 | 0 -10μm | 15 | -13μm | 45 | 0 -300μm | 35 | 0 -300μm | 1.1mm | 14.3mm |
10mm | LM10LUU | 4 | 10 | 19 | -16μm | 55 | 44 | 1.3mm | 18mm |
12mm | LM12LUU | 4 | 12 | 21 | 57 | 46 | 1.3mm | 20mm |
16mm | LM16LUU | 5 | 16 | 28 | 70 | 53 | 1.6mm | 27mm |
20mm | LM20LUU | 5 | 20 | 0 -12μm | 32 | -19μm | 80 | 61 | 1.6mm | 30.5mm |
25mm | LM25LUU | 6 | 25 | 40 | 112 | 0 -400μm | 82 | 0 -400μm | 1.85mm | 38mm |
30mm | LM30LUU | 6 | 30 | 45 | 123 | 89 | 1.85mm | 43mm |
35mm | LM35LUU | 6 | 35 | 0 -15μm | 52 | -22μm | 135 | 99 | 2.1mm | 49mm |
40mm | LM40LUU | 6 | 40 | 60 | 151 | 121 | 2.1mm | 57mm |
50mm | LM50LUU | 6 | 50 | 80 | 192 | 148 | 2.6mm | 76.5mm |
60mm | LM60LUU | 6 | 60 | 0 -20μm | 90 | -25μm | 209 | 170 | 3.15mm | 86.5mm |
Tips: What are Linear Bearings?
Linear bearings are high-precision and low-cost linear motion systems characterized by small friction force. They are often used in combination with guide shafts and produce consistent linear motion through the rolling motion of balls. Linear bearings demand not that much load in application due to the point contact between the balls and the bearing. Hardened steel balls rotate inside the bearing with minimal friction thus achieving high-precision and stable motion.
So how does a linear bearing work? The linear bearing comprises a steel ball cage in which multiple balls make endless loop motion. The cage (also retainer) is fitted with double lip seals at both end rings. A notched window is provided on the straight track along which each steel ball is loaded by a normal force to move. This part is engineered to let the force-loaded balls form rolling contact with the shaft allowing relative motion between them with a rather low friction coefficient. Hence, linear ball bushings serve as the ideal type for machinery, automation equipment and energy-saving appliances etc.
10mm shaft diameter, compact and lightweight, high load-carrying capacity with dynamic load of 588cN and static load of 1100cN. Constructed with a steel outer ring and a polyamide ball retainer equipped with 4 ball circuits. The bearing has seals from both sides. It can make a very precise, safe and reliable linear motion system.