NSK Linear Guides for Contaminated Environments

Transcription

1 SK inear Guides for Contaminated nvironments SK s advanced, high-performance seal dramatically reduces the entry of fine contaminants to less than one-tenth of existing products and provides five-times longer service life. Patent Pending

2 ith dramatically improved sealing performance, the delivers outstanding functionality and long operating life under contaminated environments. SK linear guides are designed to dramatically improve sealing capability for machinery such as equipment used for woodworking and graphite milling, which is exposed to fine particles and requires protection against the entry of fine contaminants. y adopting high-performance seals and the proven, the reduces the entry of fine contaminants into ball slides to less than one-tenth of existing products and realizes outstanding lubrication performance. Operating life is five times longer in dusty environments. As a result, the linear guides are extremely reliable and demonstrate excellent capability in contaminated environments. eatures SK inear Guides for Contaminated nvironments Applications oodworking machines Graphite milling machines uff polishers for tires aser cutting machines elding lines Conveyers and others (optional) High-performance end seal Structure of Comparison with SK standard products: ess than 1/ the level of fine contaminants Results of dust-proof tests reveal that the entry of fine contaminants is reduced to less than one-tenth of existing standard series due to improvements in sealing capability. est conditions Specimen Speed oreign matter VH30A 16.7 mm/sec Graphite powder (average grain size: mm) and Grease Operating life under contaminated environments is more than times longer 5 Durability test with rubber fragments xtreme durability tests under contaminated environments using rubber fragments show that durability of the V1 Series extended more than five times longer than the existing standard series, as shown in the graph. Standard Penetration of foreign matter, g High-performance end seal Specifications 1. High-performance end seals High-performance side seals with a multi-lip structure prevent the entry of various foreign matters. 2. lubrication unit (standard) Outstanding lubrication support of further improves sealing capability and durability. Additional units can be mounted for specific usage conditions and environments. ote: wo K1 units, one at each end, are mounted as standard equipment on each ball slide of the. 3. Caps for rail mounting holes enhance sealing performance Sealing the holes for mounting bolts to eliminate the accumulation of foreign matter prevents the entry of contaminants into ball slides. ote: olt hole caps are packed in linear guides prior to delivery. 4. Surface treatment wo types of surface treatment that are optimum for linear guides are available: low-temperature chrome plating and low-temperature fluorinated chrome plating. est conditions Specimen Rail orientation Speed ubrication oreign matter VH30A, preload with Z1 (preload of 245 ) Horizontal (wall mount) 500 mm/sec Grease (charged only at the beginning) Rubber fragments Durability test with fine wood particles xtreme durability tests in a contaminated environment using fine wood particles show that durability of the is more than doubled compared to the standard series, as shown in the graph. Standard Running distance, km efore passage of ball slide (Significant foreign matter remains after passage of the slider) After passage of ball slide (All foreign matter is swept away) ecause poor sealing capability allows foreign matter to enter the slider, foreign matter remains on the rail after the slider passes. 5. (optional) on-contact metal protectors can be installed on the exterior of the end seal to protect the seal from heat and hard dust particles. 6. apped holes on a rail bottom face (optional) In addition to standard mounting bolt holes (counterbores on a rail top face), a specification for tapped holes on a rail bottom face for enhanced sealing capability is available for the. otes: Accuracy grade is compatible with high grade (K6) and normal grades (K and KC) Minimum rail length for production is 400 mm. est conditions Specimen Rail orientation eed rate ubrication oreign matter VH30A, preload with Z1 (preload of ) Horizontal (wall mount) 400 mm/sec Grease (charged only at the beginning) ine wood particles Standard Running distance, km apping pitch is the same as the pitch for regular mounting bolt holes. Please refer to the dimensions provided in able 12. stimate the length of the bolt by adding 2 5 mm extra length to the effective depth of tapping. 1 2

3 Selection Many variations are available for different environments and applications. Please refer to the following lists of products, mounting methods, and material and surface treatment to determine the specifications for your needs. SK inear Guides for Contaminated nvironments 3 Reference number he reference number may be used as a guide prior to finalizing specifications. he components of the reference number represent particular specifications; therefore when requesting estimates or inquiring about specifications, please refer to the reference number, except the design number. he reference numbers also identify single rail specifications. At least two sets of reference numbers are required for multiple rails. able 1 product line height High type ow type ength of ball slides Square type all slide shape code/mounting code lange type apped mounting holes apped mounting holes olt mounting hole or both tapped and bolt mounting holes Standard (high load) A ong (super high load) Standard (high load) A M ong (super high load) G H GM able 2 all slide mounting methods Square type lange type apped mounting holes apped mounting holes olt mounting hole able 3 Material and surface treatment Code Content Code Content or both tapped and bolt mounting holes C Special carbon steel (SK standard) + counterbores on a rail top face V Special carbon steel (SK standard) + tapped holes on a rail bottom face K Stainless steel + counterbores on a rail top face Stainless steel + tapped holes on a rail bottom face D Special carbon steel + surface treatment + counterbores on a rail top face Special carbon steel + surface treatment + tapped holes on a rail bottom face H Stainless steel + surface treatment + counterbores on a rail top face S Stainless steel + surface treatment + tapped holes on a rail bottom face Z Others, special able 4 Accuracy grade xample: VH A C 2 - K5 1 - Size o. all slide shape code: refer to able 1 Material/surface treatment code: refer to able 3 able 5 Preload types o code: single rail Preload code: refer to able 5 Accuracy grade code: refer to able 4 umber of ball slides per rail Preloaded assembly types Interchangeable types Preloaded assembly types Interchangeable type Ultra super precision Super precision High precision Precision ormal ormal Medium preload Slight preload ine clearance Slight preload ormal K3 K4 K5 K6 K KC Z3 Z1 Z0 ZZ Z able 6 Range of rail production Only VH15, 20, 25 and 30 are available with stainless steel. Z is omitted in the reference number. Material Size Special carbon steel Stainless steel Rails for butting connections may be used for rail lengths that exceed the above limitation. Please consult with SK. Accuracy able 7 Accuracy standard for preloaded assembly types Accuracy Grade Ultra super precision Super precision High precision Precision ormal Item K3 K4 K5 K6 K Mounting height H ± ± ±20 ±40 ±80 Variations of mounting height H (All ball slides on a pair of rails) Mounting width dimensions 2 or 3 ±15 ±15 ±25 ±50 ±0 Variation of mounting width dimensions 2 or (All ball slides on datum rails) Running parallelism of face C against face A Running parallelism of face D against face Refer to able 9, ig. 1 and ig. 2 able 8 Accuracy standard for interchangeable type Accuracy grade ormal KC ypes Item VH15, 20, 25, 30, 35 VH45, 55 Mounting H ±20 ±30 Variation of mounting height H (one rail) Variation of mounting height H (multiple rails) Mounting width dimension 2 or 3 ±30 ±35 Variation of mounting width dimension 2 or Running parallelism of face C against face A Running parallelism of face D against face Refer to able 9, ig. 1 and ig. 2 ig. 1 Drawing for accuracy standard (mounting with 2) H H C C D D ig. 2 Drawing for accuracy standard (mounting with 3) 3 able 9 Running parallelism tolerance Unit: µm Accuracy grade Interchangeable Preloaded assembly types type over or less K3 K4 K5 K6 K KC Unit: µm Unit: µm Handling Precautions Observe the following precautions to maintain the long-term efficiency of the high performance seals: 1. Permissible temperature range Maximum operating temperature: 50 C Maximum instantaneous peak temperature: 80 C 2. Chemical precautions ever leave the linear guide near grease-removing organic solvents such as hexane or thinner. ever immerse the the linear guide in kerosene or rust preventive oils which contain kerosene. Carefully remove ball slides from the rails, as the balls can fall out. hen the rails are tilted without the stopper, the ball slides may move along the rail and fall out. hen ball slides are used upside down (for example, when the rails are attached to the ceiling with the ball slides down), take special precautions such as installing a safety device to prevent the ball slides from falling. 4

4 Dimensions SK inear Guides for Contaminated nvironments VH-A (high load/low type) VH-A (high load/high type) VH- (super high load/low type) VH- (super high load/high type) xample: VH A C 2 - K5 1 - Size o. o code: single rail Preload code: refer to able 5 all slide shape code: refer to able 1 Material/surface treatment code: refer to able 3 Accuracy grade code: refer to able 4 umber of ball slides per rail ithout protector ith protector Specification for counterbores on a rail top face ød h K1 1 4 M K M H1 G ød n 0 (G) Specification for tapped holes on a rail bottom face A, A type, type A, A type, type M able Dimensions Roller slide Model o. Height idth ength apped mounting hole Grease nipple H 2 M1 Pitch K K1 Mounting hole 1 VH15A M VH φ VH20A M VH M VH25A 36 M VH25A 40 M M VH25 36 M VH25 40 M VH30A 42 M VH30A 45 M M VH30 42 M VH30 40 M VH35A 48 M VH35A 55 M VH35 48 M M VH35 55 M VH45A 60 M VH45A 70 M VH Rc1/8 M VH45 70 M VH55A 70 M VH55A 80 M VH Rc1/8 M VH55 80 M igure inside < > is the dimension when equipped with the protector. igure inside [ ] is applied to stainless products. Rail asic load rating all diameter eight Rail width Rail height Pitch Counterbore apped hole G Maximum Dynamic length Static Static moment ( m) all slide Rail 1 H1 d D h M2 Pitch 2 3 (recommended) 0max C () C0() MR0 MP0 MY0 D (kg) (kg/m) M [1 800] M M M M M M

5 Dimensions SK inear Guides for Contaminated nvironments VH- (high load/low type) VH-G (super high load/low type) xample: VH C 2 - K5 1 - Size o. o code: single rail Preload code: refer to able 5 all slide shape code: refer to able 1 Material/surface treatment code: refer to able 3 Accuracy grade code: refer to able 4 umber of ball slides per rail ithout protector ød 1 1 ith protector 1 1 Specification for counterbores on a rail top face H 1 h ød G n (G) 0 type type Specification for tapped holes on a rail bottom face M M M H G type 3 1 G type 7 able 11 Dimensions Roller slide Model o. Height idth ength apped mounting hole Grease nipple H 2 M1 Pitch K K1 Mounting hole 1 VH M VH15G φ VH M6 1 5 VH20G M VH M VH25G [M ] [12] 5 M VH M VH30G [M ] [15] 5 M VH M VH35G M VH M VH45G Rc1/ VH M VH55G Rc1/ igure inside < > is the dimension when equipped with the protector. igure inside [ ] is applied to stainless products. Rail asic load rating all diameter eight Rail width Rail height Pitch Counterbore apped hole G Maximum length Dynamic Static Static moment ( m) all slide Rail 1 H1 d D h M2 Pitch 2 3 (recommended) 0max C () C0() MR0 MP0 MY0 D (kg) (kg/m) M [1 800] M M M M M M

6 Dimensions SK inear Guides for Contaminated nvironments VH- (high load/low type) VH-M (high load/low type) VH-H (super high load/low type) VH-GM (super high load/low type) xample: VH C 2 - K5 1 - Size o. o code: single rail Preload code: refer to able 5 all slide shape code: refer to able 1 Material/surface treatment code: refer to able 3 Accuracy grade code: refer to able 4 umber of ball slides per rail ithout protector Specification for counterbores on a rail top face ith protector Specification for tapped holes on a rail bottom face M, GM type, H type, H type M, GM type able 12 Dimensions Roller slide Model o. Height idth ength apped mounting hole Grease nipple Q1 1 H 2 M1 Pitch 1 Q K K1 Mounting hole 1 VH VH15M M VH15H VH15GM M φ VH VH20M M VH20H VH20GM M M [7 11.5] VH M VH25M [M ] [7 11.5] [12] VH25H M M VH25GM [M ] 9 12 [9 14.5] VH30 M VH30M [M ] VH30H 9 12 [9 14.5] 9 33 [15] M VH30GM [M ] 5 M VH VH35M M VH35H VH35GM M M VH VH45M M VH45H VH45GM M Rc1/ VH VH55M M VH55H VH55GM M Rc1/ igure inside < > is the dimension when equipped with the protector. igure inside [ ] is applied to stainless products. Rail asic load rating all diameter eight Rail width Rail height Pitch Counterbore apped hole G Maximum length Dynamic Static Static moment ( m) all slide Rail 1 H1 d D h M2 Pitch 2 3 (recommended) 0max C () C0() MR0 MP0 MY0 D (kg) (kg/m) M M M M [1 800] M M M

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