309 t Linear guides utilize steel balls rolling on precisely ground raceways, and the balls are recirculated by plastic return caps. t&OE TFBMT QSFWFOU GPSFJHO TVCTUBODFT GSPN JOUSVEJOH JOUP UIF CMPDLT t Miniature Type has two rows of contacting steel balls in a 4-point raceway contact design. t Medium/Heavy Load Types have four rows of contacting steel balls in a 2-point raceway contact design. t Load ratings are the same for all four directions (radial, reverse-radial, and lateral directions). Can be used in any orientation. t Cautions 2Linear Guide - Structure and Features Miniature Type Medium/Heavy Load Type Side Seal Retainer (Wire) Ball Block Rail Return Cap Retainer (Wire) Bottom Retainer Upper Retainer Middle Retainer Block Rail Under Seal Ball Side Seal Return Cap Retainer t Dimensional Accuracy Type Accuracy Standards Existing Products C-VALUE Products Precision Grade High Grade Standard Grade Standard Grade Miniature Type Height H Tolerance ±10 ±20 ±20 ±40 Pair Variation of Height H 7 15 40 30 Width W2 Tolerance ±15 ±25 ±25 ±40 Pair Variation of Width W2 10 20 40 30 Medium/ Heavy Load Type Accuracy Standards High Grade Interchangeable Standard Grade Standard Grade Height H Tolerance ±40 ±20 ±100 ±120 Pair Variation of Height H 15 15 20 40 Width W2 Tolerance ±20 ±30 ±100 ±100 Pair Variation of Width W2 24, 28 15 25 20 40 33, 42 15 25 30 40 30, 36, 40, 42 - 25 - 40 Rail Length (mm) Miniature Medium/Heavy Load Existing Products C-VALUE Existing Products C-VALUE over or Less Precision Grade High Grade Standard Grade Standard Grade High Grade Interchangeable Standard Grade Standard Grade 50 2 3 13 13 7 6 7 10 50 80 2 3 13 13 7 6 7 10 80 125 3 7 15 15 7 6.5 7 10 125 200 3 7 15 15 7 7 7 10 200 250 3.5 9 17 17 7 8 7 10 250 315 4 11 18 18 8 9 12 10 315 400 5 11 18 18 8 11 12 12 400 500 5 12 19 19 9 12 14 13 500 630 6 13.5 21 21 11 14 18 15 630 800 6 14 21.5 21.5 13 16 21 17 800 1000 - 14.5 18 23 19 1000 1250 - 16 20 25 22 1250 1600 - - 23 27 23 1600 2000 - - 26 28.5 24 W2 H Reference Side D A B C [Pair Variation of Height H] Difference between the min./max. values of Height (H) Dimension for a number of blocks combined on one rail. [Pair Variation of Width W2 ] Difference between the min./max. values of Width (W) Dimension for a number of blocks combined on one rail. [Running Parallelism] Measured while the rail is bolted firmly to a standard datum surface base. A relative variation of block's top surface C against the rail's bottom surface A, and a relative variation of block's datum surface D against the rail's datum surface B are measured, as the block is run from end to end on the rail. 2Precision t 3VOOJOH 1BSBMMFMJTN PG 1MBOF $ against Plane A t 3VOOJOH 1BSBMMFMJTN PG 1MBOF % against Plane B Do not apply a shock to the return cap. Doing so will affect the ball circulation and may cause sliding defects. Balls do not fall out of MISUMI linear guides when removed from rails as the blocks are equipped with ball-retainers. However, the balls may fall out by rapidly removing blocks from the rail or inserting the rail into the block at a slant. Remove and install the blocks with caution. t 3VOOJOH 1BSBMMFMJTN Unit: μm Linear Guide Structure and Precision
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