Tube Guide Shafts, Both End Threaded with Wrench Flats
Brand :
MISUMI
Caution
Product Description
Product Overview
The linear guide shaft is a high-precision shaft product that can be used in conjunction with linear bearings and other bushing-type products, offering excellent wear resistance.
The hollow section of the tube shaft can be used for wiring. It is a lightweight linear guide shaft.
The hollow section of the tube shaft can be used for wiring. It is a lightweight linear guide shaft.
Dimensional Drawing
■ Material specifications
The tube shaft end face and inner bore are not surface treated, so rust may occur.
When measuring hardness, due to structural reasons, using a Rockwell hardness tester (HRC) for small diameter specifications may result in significant errors. It is recommended to use a Vickers hardness tester (HV) for testing.
| TYPE | D tolerance |  Equivalent material |  Hardness |  Surface treatment | |
| Internal thread type on both ends | Internal thread type on both ends With wrench slot type | ||||
| E-PSPJW | E-PSPWR | g7 | GB: 45 JIS: S45C | High-frequency quenching 55HRC~ For effective hardened layer depth, please click  Surface hardness reference | Hard chrome plating Plating hardness HV750~ Plating thickness 3µ or more |
The tube shaft end face and inner bore are not surface treated, so rust may occur. When measuring hardness, due to structural reasons, using a Rockwell hardness tester (HRC) for small diameter specifications may result in significant errors. It is recommended to use a Vickers hardness tester (HV) for testing.Specification Table
■ Size specifications
| Type | L Specified unit: 1 mm | M (coarse thread) · N (coarse thread) Selection | Wrench slot size | d | C | |||||
| TYPE | D | Outer diameter g7 | SC | W | ℓ1 | |||||
| Internal thread on both ends type E-PSPJW Internal thread on both ends type With wrench slot type E-PSPWR | 6 | -0.004 -0.016 | 20–600 | 3 | SC = specified unit 1 mm When D ≤ 25 SC + ℓ1 ≤ L – N × 2 SC ≥ M × 2 When D ≥ 30SC + ℓ1 ≤ L SC ≥ 0 | 5 | 8 | 2 | 0.5 or less | |
| 8 | -0.005 -0.020 | 20–800 | 4 | 5 | 7 | 3 | ||||
| 10 | 20–800 | 5 | 6 | 8 | 4 | |||||
| 12 | -0.006 -0.024 | 20–1000 | 8 | 10 | 10 | 6 | ||||
| 13 | 25–1000 | 10 | 11 | 7 | ||||||
| 16 | 30–1200 | 12 | 14 | 10 | ||||||
| 20 | -0.007 -0.028 | 30–1200 | 16 | 17 | 14 | 1.0 or less | ||||
| 25 | 35–1200 | 20 | 22 | 15 | ||||||
| 30 | 35–1500 | 20 | 27 | 15 | 18 | |||||
■ Additional machining
Accuracy Reference
■ Roundness, straightness, and L dimension accuracy
■ Roundness of section D
■ Roundness of section D
| Shaft diameter (greater than) | Shaft diameter (up to) | Shaft tolerance g6 | Shaft tolerance g7 (economy type) |
| 6 | 10 | 0.004 | 0.012 |
| 10 | 13 | 0.004 | 0.012 |
| 13 | 16 | 0.005 | 0.016 |
| 16 | 20 | 0.005 | 0.016 |
| 20 | 30 | 0.006 | 0.020 |
■ Method for measuring straightness
■ Straightness
■ Straightness
| Shaft diameter | Overall length | Shaft tolerance g6 | Shaft tolerance g7 (economy type) |
| 6–30 | ≤ 100 | Less than 0.01 | Less than 0.025 |
| > 100 | (L/100) × less than 0.01 | (L/100) × less than 0.025 |
■ Tolerance of L dimension (Y dimension)
| Dimension (greater than) | Dimension (up to) | Shaft tolerance g6 | Shaft tolerance g6 (economy type) |
| 6 | 30 | ±0.2 | |
| 30 | 120 | ±0.3 | |
| 120 | 400 | ±0.5 | |
| 400 | 1000 | ±0.8 | |
| 1000 | 1500 | ±1.2 | |
■ Coaxiality, perpendicularity
Product Features
Feature 1: The product is lightweight, with the tube shaft weighing 35% less than a solid shaft.
Feature 2: The hollow section inside the tube can be used for wiring, allowing for customized routing and reducing the space occupied by cables inside the equipment.
Feature 3: It has high-precision dimensional and geometric tolerances, making it widely used in various precision equipment.
Feature 4: Made from carbon steel (S45C) and treated with high-frequency quenching, it enhances wear resistance while maintaining original toughness.
Feature 5: Various additional processing options are available to meet different usage environments.
Feature 6: Typically used in combination with linear bearing products, offering excellent linear guidance. Compared to standard shaft and bushing structures, even during high-speed reciprocating motion, there is minimal wear.
Feature 7: Optional hard chrome plating surface treatment provides excellent rust resistance, with a coating hardness reaching HV750. When used with high-hardness workpieces, it is not easily worn.
Feature 8: Compared to standard guide shaft products, the price is significantly lower.
Feature 2: The hollow section inside the tube can be used for wiring, allowing for customized routing and reducing the space occupied by cables inside the equipment.
Feature 3: It has high-precision dimensional and geometric tolerances, making it widely used in various precision equipment.
Feature 4: Made from carbon steel (S45C) and treated with high-frequency quenching, it enhances wear resistance while maintaining original toughness.
Feature 5: Various additional processing options are available to meet different usage environments.
Feature 6: Typically used in combination with linear bearing products, offering excellent linear guidance. Compared to standard shaft and bushing structures, even during high-speed reciprocating motion, there is minimal wear.
Feature 7: Optional hard chrome plating surface treatment provides excellent rust resistance, with a coating hardness reaching HV750. When used with high-hardness workpieces, it is not easily worn.
Feature 8: Compared to standard guide shaft products, the price is significantly lower.
Usage Method
| Usage example | Medium precision - tube type | Medium precision | High precision |
| Economy type g7 | Economy type g7 | g6 Standard Type / g6 Precision Type | |
 |  |  | |
| Recommended Applications | - Medium precision applications - Light load - Suitable for situations where wiring needs to be hidden inside the tube - Cost-effective design | - Medium precision applications - Light load - Used vertically and suitable for light loads - Shorter travel distance, lower frequency, and lower speed - Cost-effective design | - For high-precision applications (outer diameter, straightness, roundness) - For heavy load and high durability applications - Suitable for use in the horizontal direction and for heavy loads - Greater sliding distance, frequency, and speed |
Precautions
 | (1) Surface hardness confirmation For quenched guide shafts, the standard for the depth of the hardened layer varies depending on the outer diameter and tolerance. Please refer to the table below for details:
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 | (2) Reduced hardness in machined areas After quenching the base material, machining may cause reduced hardness due to annealing in the following areas: - All external threads -All steps -Internal threads: when M ≥ D/2, double-hole type internal threads, hard chrome-plated SUS440C products -Additional machining of wrench slots (SC-WSC-SX) -Additional machining of flat surfaces (FC-WFC) -Additional machining of V-grooves (VC-WVC) -Except for fully hardened types. | |||||||||||||||||||||||
Only the shaded area in section D is hard chrome plated. | (3) Plating after surface treatment After surface treatment of the base material, machining is performed, and the following areas are not plated: - Groove areas -External thread sections -Internal thread sections -Wrench slots, V-grooves, flat surfaces, and cut surfaces -The inside of pipe-type guide shafts is not hard chrome plated and may rust. | |||||||||||||||||||||||
Example of Use
Application Industries
| Medical | Semiconductors | Electronics and Electrical Appliances | ||
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| Smartphones | Food | Automotive | ||
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