Linear Guideways QH Series
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- Marshall Norton
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1 G99TE Quiet Linear Guideway, with SynchMotion TM Technology The development of HIWIN-QH linear guideway is based on a four-row circular-arc contact. The HIWIN-QH series linear guideway with SynchMotion TM Technology offers smooth movement, superior lubrication, quieter operation and longer running life. Therefore the HIWIN-QH linear guideway has broad industrial applicability. In the hightech industry where high speed, low noise, and reduced dust generation is required, the HIWIN-QH series is interchangeable with the HIWIN-HG series Features (1) Low Noise Design With SynchMotion TM technology, rolling elements are interposed between the partitions of SynchMotion TM to provide impoved circulation. Due to the elimination of contact between the rolling elements, collision noise and sound levels are drastically reduced. 8 7 HG25 no grease QH25 no grease 5dB HG25 no grease QH25 no grease db(a) 6 db(a) mm/s khz (2) Self-Lubricant Design The partition is a grouping of hollow ring-like structures formed with a through hole to facilitate circulation of the lubricant. Because of the special lubrication path design, the lubricant of the partition storage space can be refilled. Therefore, the frequency of lubricant refilling can be decreased. The QH-series linear guideway is pre-lubricated. Performance testing at a.2c (basic dynamic load) shows that after running 4,km no damage was apparent to either the rolling elements or the raceway. Lubricant refill Lubricant refill
2 G99TE Table Test Test Sample QHH25CAZAH Test Speed Lubricant 24m/min lithium soap base grease (initial lubrication only) 5kN Distance travel 4,km =5,N After 4,km (3) Smooth Movement In standard linear guideways, rolling elements on the load side of the guide block begin rolling and push their way through the raceway. When they contact other rolling elements they create counter-rotational friction. This results in a great variation of rolling resistance. The QH linear guideway, with SynchMotion TM technology prevents this condition. As the block starts to move, the rolling elements begin rolling consecutively and remain separated to prevent contact with one another thus keeping the element's kinetic energy extremely stable in order to effectively reduce fluctuations in rolling resistance. Force(N) SynchMotion Type Conventional Type Time(.5sec) (4) High Speed Performance The Hiwin-QH series offers excellent high-speed performance due to the partitions of the SynchMotion TM structure. They are employed to separate the adjacent balls thereby resulting in low rolling traction and the metallic friction between adjacent balls is eliminated. Block
3 G99TE Table Test Sample QHW25CAZAH High Speed Test High Speed Test Speed 13m/min Lubricant lithium soap base grease (initial lubrication only) Distance travel 9,5km High Speed Test V=13m/min After 9,5km Construction Block End cap End seal Ball The SynchMotion Retainer Bottom seal Bolt cap Model Number of HIWIN-QH series guideway can be classified into non-interchangeable and interchangeable types. The sizes are identical. The main difference is that the interchangeable blocks and rails can be freely exchanged. Because of dimensional control, the interchangeable type linear guideway is a perfect choice for the client when rails do not need to be paired for an axis. And since the QH and HG share the identical rails, the customer does not need to redesign when choosing the QH series. Therefore the HIWIN-QH linear guideway has increased applicability.
4 G99TE Block Type W : Flange Type H : Square Type (1) Non-interchangeable type Model size 15, 2, 25, 3, 35, 45 Type C : Heavy H : Super Heavy Block Mounting A : Mounting From Top B : Bottom C : Top or Bottom E: Special Block None: Standard Block No. of Blocks per QH W 25 C A E 2 R 16 E ZA P II + KK/RC/E2 (2) Interchangeable type Model Number of QH Block Precision Code: C, H, P, SP, UP Preload Code: Z, ZA, ZB E: Special None: Standard Length (mm) Mounting Type R : Mounting From Top T : Bottom E2:Self-lubrication Type RC:Reinforced Cap Dust Protection 2 No. of s per Axis set 1 Note : 1. The roman numerals representing the number of rails used in one axis. As for the single rail in an axis, it shows no symbol. Note : 2. For dust protection, it is no symbol if it is standard (end seal and bottom seal). ZZ : End seal, bottom seal and scraper. KK : Double seals, bottom seal and scraper. DD : Double seals and bottom seal. Block Type W : Flange Type H : Square Type Model size 15, 2, 25, 3, 35, 45 Type C : Heavy H : Super Heavy QH W 25 C A E ZA P + KK/E2 E2 : Self-lubrication Type Dust Protection 2 Precision Code : C, H, P Preload Code : Z, ZA E: Special Block None: Standard Block Block Mounting Type A : Mounting From Top B : Bottom, C : Top or Bottom Model Number of QH (QH and HG share the identical rails) QH/HG Series Interchangeable Model size 15, 2, 25, 3, 35, 45 Mounting Type R : Mounting From Top T : Bottom HG R 25 R 12 E P + RC RC : Reinforced Cap Precision Code : C, H, P E: Special, None: Standard Length (mm)
5 G99TE Accuracy Classes The accuracy of QH series can be classified into normal (C), high (H), precision (P), super precision (SP), ultra precision (UP), five classes. Please choose the class by referring the accuracy of applied equipment. (1) Accuracy of non-interchangeable Table Accuracy Standards Item QH - 15, 2 Accuracy Classes Unit: mm Super Ultra Normal High Precision Precision Precision (C) (H) (P) (SP) (UP) Dimensional tolerance of height H ±.1 ± Dimensional tolerance of width N ±.1 ± Variation of height H Variation of width N Running parallelism of block surface C to surface A See Table Running parallelism of block surface D to surface B See Table Table Accuracy Standards Item QH - 25, 3, 35 Accuracy Classes Dimensional tolerance of height H ±.1 ±.4 Dimensional tolerance of width N ±.1 ±.4 Super Ultra Normal High Precision Precision Precision (C) (H) (P) (SP) (UP) Variation of height H Variation of width N Running parallelism of block surface C to surface A See Table Running parallelism of block surface D to surface B See Table Table Accuracy Standards Item QH - 45 Accuracy Classes Dimensional tolerance of height H ±.1 ±.5 Dimensional tolerance of width N ±.1 ±.5 Unit: mm Super Ultra Normal High Precision Precision Precision (C) (H) (P) (SP) (UP) Variation of height H Variation of width N Running parallelism of block surface C to surface A See Table Running parallelism of block surface D to surface B See Table Unit: mm
6 G99TE (2) Accuracy of interchangeable Table Accuracy Standards Item QH - 15, 2 Unit: mm Accuracy Classes Normal High Precision (C) (H) (P) Dimensional tolerance of height H ±.1 ±.3 ±.15 Dimensional tolerance of width N ±.1 ±.3 ±.15 Variation of height H Variation of width N Running parallelism of block surface C to surface A See Table Running parallelism of block surface D to surface B See Table Table Accuracy Standards Item QH - 25, 3, 35 Unit: mm Accuracy Classes Normal High Precision (C) (H) (P) Dimensional tolerance of height H ±.1 ±.4 ±.2 Dimensional tolerance of width N ±.1 ±.4 ±.2 Variation of height H Variation of width N Running parallelism of block surface C to surface A See Table Running parallelism of block surface D to surface B See Table Table Accuracy Standards Item QH - 45 Unit: mm Accuracy Classes Normal High Precision (C) (H) (P) Dimensional tolerance of height H ±.1 ±.5 ±.25 Dimensional tolerance of width N ±.1 ±.5 ±.25 Variation of height H Variation of width N Running parallelism of block surface C to surface A See Table Running parallelism of block surface D to surface B See Table 2-6-9
7 G99TE (3) Accuracy of running parallelism Table Accuracy of Running Parallelism Length (mm) Accuracy (µm) C H P SP UP ~ ~ ~ ~ ~ ~ ~ 1, ,1 ~ 1, ,5 ~ 1, ,9 ~ 2, ,5 ~ 3, ,1 ~ 3, ,6 ~ 4, Preload (1) Definition A preload can be applied to each guideway. Oversized balls are used. Generally, a linear motion guideway has a negative clearance between groove and balls in order to improve stiffness and maintain high precision. The figure shows the load is multiplied by the preload, the rigidity is doubled and the deflection is reduced by one half. The preload not larger than ZA would be recommended for the model size under QH2 to avoid an over-preload affecting the guideway s life. Elastic displacement Preload amount Z Elastic displacement without preload ZB Elastic displacement with heavy preload (2) Preload classes HIWIN offers three classes of standard preload for various applications and conditions. Table Preload Classes Class Code Preload Condition Examples of Application Light Preload Z ~.2C Certain load direction,low impact, low precision required Transportation devices, auto-packing machines, X-Y axis for general industrial machines, welding machines, welders Medium Preload ZA.5C~.7C High precision required Machining centers, Z axis for general industrial, machines, EDM, NC lathes, Precision X-Y tables, measuring equipment Heavy Preload ZB.1C~.12C High rigidity required, with vibration and impact Machining centers, grinding machines, NC lathes, horizontal and vertical milling machines, Z axis of machine tools, Heavy cutting machines Class Interchangeable Guideway Non-Interchangeable Guideway Preload classes Z, ZA Z, ZA, ZB Note: The C in the preload column denotes basic dynamic load rating.
8 G99TE Dust Proof Accessories (1) Codes of accessories If the following accessories are needed, please add the code followed by the model number. t2 Bottom Seal End seal No symbol: Standard Protection (End seal + Bottom Seal) End seal Scraper Spacer ZZ (End seal + Bottom Seal + Scraper) End seal End seal Spacer Scraper KK (Double seals + Bottom Seal + Scraper) Spacer t1 DD (Double seals + Bottom Seal) (2) End seal and bottom seal To prevent life reduction caused by iron chips or dust entering the block. (3) Double seals Enhances the wiping effect, foreign matter can be completely wiped off. Table Dimensions of end seal Size Thickness (t1) (mm) Size Thickness (t1) (mm) QH15 ES 3 QH3 ES 3.2 QH2 ES 2.5 QH35 ES 2.5 QH25 ES 2.5 QH45 ES 3.6 (4) Scraper The scraper removes high-temperature iron chips and larger foreign objects. Table Dimensions of scraper Size Thickness (t2) (mm) Size Thickness (t2) (mm) QH15 SC 1.5 QH3 SC 1.5 QH2 SC 1.5 QH35 SC 1.5 QH25 SC 1.5 QH45 SC 1.5
9 G99TE (5) Dimensions of block equipped with the dustproof parts L Table Overall block length Size Overall block length (L) Standard ZZ DD KK QH15C QH2C QH2H QH25C QH25H QH3C QH3H QH35C QH35H QH45C QH45H unit: mm
10 G99TE Friction The maximum value of seal resistance per block are shown in the table. Table Seal Resistance Size Resistance N (kgf) QH (.12) QH2 1.6 (.16) QH25 2. (.2) QH3 2.7 (.27) QH (.31) QH (.53) The Accuracy Tolerance of Mounting Surface (1) The accuracy tolerance of rail-mounting surface Because of the Circular-arc contact design, the QH linear guideway can compensate for some surface-error on installation and still maintain smooth linear motion. As long as the accuracy requirements for the mounting surface are followed, high accuracy and rigidity of linear motion of the guideway can be obtained without any difficulty. In order to satisfy the needs of fast installation and smooth movement, HIWIN offers the normal clearance type of preload to customers of its high absorption ability of the deviation in mounting surface accuracy. (2) The parallelism tolerance of reference surface Table Max. Parallelism Tolerance (P) unit: µm Size Preload classes Z ZA ZB QH QH QH QH QH QH (3) The accuracy tolerance of reference surface height Table Max. Tolerance of Reference Surface Height (S 1 ) unit: µm Size Preload classes Z ZA ZB QH QH QH QH QH QH
11 G99TE Cautions for Installation r 2 (1) Shoulder heights and fillets Improper shoulder heights and fillets of mounting surfaces will cause a deviation in accuracy and the interference with the chamfered part of the rail or block. As long as the recommended shoulder heights and fillets are followed, installation inaccuracies should be eliminated. H 1 E 1 Block r 1 Block E 2 Table Shoulder Heights and Fillets Size Max. radius of fillets Max. radius of fillets Shoulder height of the rail Shoulder height of the block Clearance under block r 1 (mm) r 2 (mm) E 1 (mm) E 2 (mm) H 1 (mm) QH QH QH QH QH QH (2) Tightening Torque of Bolts for Installation Improper tightening of bolts will seriously influence the accuracy of Linear Guideway installation. The following tightening torques for different sizes of bolts are recommended. Table Mounting Torque Size Bolt size Torque N-cm(kgf-cm) Iron Casting Aluminum QH15 M4.7P 16L 392 (4) 274 (28) 26 (21) QH2 M5.8P 16L 883 (9) 588 (6) 441 (45) QH25 M6 1P 2L 1373 (14) 921 (94) 686 (7) QH3 M8 1.25P 25L 341 (31) 21 (25) 147 (15) QH35 M8 1.25P 25L 341 (31) 21 (25) 147 (15) QH45 M P 35L (12) 784 (8) 588 (6)
12 G99TE Dimensions for HIWIN (1) QHH-CA / QHH-HA l Model No. Dimensions of Assembly (mm) Dimensions of Block (mm) Dimensions of (mm) Mounting Bolt for Dynamic Static M R Static Rated Moment H H 1 N W B B 1 C L 1 L K 1 K 2 G Mxl T H 2 H 3 W R H R D h d P E (mm) C(kN) C (kn) kn-m kn-m kn-m M P M Y Weight Block QHH15CA M4 x M4x kg kg/m QHH2CA M5 x M5x16 QHH2HA QHH25CA M6 x M6x2 QHH25HA QHH3CA M8x M8x25 QHH3HA QHH35CA M8x M8x25 QHH35HA QHH45CA M1x M QHH45HA Note : 1 kgf = 9.81 N
13 G99TE (2) QHW-CA / QHW-HA Model No. Dimensions of Assembly (mm) Dimensions of Block (mm) Dimensions of (mm) Mounting Bolt for Dynamic Static M R Static Rated Moment M P M Y Weight Block H H 1 N W B B 1 C L 1 L K 1 K 2 G M T T 1 T 2 H 2 H 3 W R H R D h d P E (mm) C(kN) C (kn) kn-m kn-m kn-m kg kg/m QHW15CA M M4x QHW2CA M M5x16 QHW2HA QHW25CA M M6x2 QHW25HA QHW3CA M M8x25 QHW3HA QHW35CA M M8x25 QHW35HA QHW45CA M M12x35 QHW45HA Note : 1 kgf = 9.81 N
14 G99TE (3) QHW-CB / QHW-HB Model No. Dimensions of Assembly (mm) Dimensions of Block (mm) Dimensions of (mm) Mounting Bolt for Dynamic Static M R Static Rated Moment M P M Y Weight Block H H 1 N W B B 1 C L 1 L K 1 K 2 G M T T 1 T 2 H 2 H 3 W R H R D h d P E (mm) C(kN) C (kn) kn-m kn-m kn-m kg kg/m QHW15CB Ø M4x QHW2CB Ø M5x16 QHW2HB QHW25CB Ø M6x2 QHW25HB QHW3CB Ø M8x25 QHW3HB QHW35CB Ø M8x25 QHW35HB QHW45CB Ø M12x35 QHW45HB Note : 1 kgf = 9.81 N
15 G99TE (4) QHW-CC / QHW-HC Model No. Dimensions of Assembly (mm) Dimensions of Block (mm) Dimensions of (mm) Mounting Bolt for Dynamic Static M R Static Rated Moment M P M Y Weight Block H H 1 N W B B 1 C L 1 L K 1 K 2 G M T T 1 T 2 H 2 H 3 W R H R D h d P E (mm) C(kN) C (kn) kn-m kn-m kn-m kg kg/m QHW15CC M M4x QHW2CC M M5x16 QHW2HC QHW25CC M M6x2 QHW25HC QHW3CC M M8x25 QHW3HC QHW35CC M M8x25 QHW35HC QHW45CC M M12x35 QHW45HC Note : 1 kgf = 9.81 N
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