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Makishinko Co., Ltd.
catalog_Screw-Jack

catalog_Screw-Jack

Product catalog summary

Overview: The document provides a comprehensive technical comparison between trapezoid screws and ball screws, detailing their features, specifications, and applications. It also covers the JA series screw jacks, including their specifications and performance metrics.

Trapezoid vs. Ball Screws:

Trapezoid Screws: Known for their self-locking feature, providing safety by preventing falling. They are cost-effective but have higher backlash compared to ball screws.
Ball Screws: Offer high efficiency and reduced backlash but lack self-locking capabilities and are more expensive.

Whirl Stop Function: Essential to prevent the screw shaft from rotating in the same direction as the worm wheel, converting rotational force into thrust.

JA Series Screw Jacks:

Capacity: Standardized capacities range from 2kN to 1250kN, suitable for various applications.
Lubrication: Grease is used for lower capacities (5kN, 10kN), while oil splash methods are used for higher capacities (25kN and above).
Design: Features include solid housing, ideal bearing structures, and high precision components. Housing material varies with size, using cast steel or ductile cast iron.
Performance: Detailed tables on nominal capacities, screw shaft dimensions, reduction ratios, and efficiency metrics for different JA models.

Specifications and Performance Metrics:

Tables provide data on nominal capacity, screw shaft diameter, screw pitch, reduction ratios, and efficiency at various input speeds.
Performance metrics include load capacities, speed, efficiency, lost power, and power requirements for different JA models and sizes.

Conclusion: The document serves as a comprehensive guide for selecting the appropriate screw type and JA series model based on specific application requirements, emphasizing the importance of self-locking features, efficiency, and capacity.

Specifications: Detailed specifications for motor units and geared motor units, including motor speed, load capacity, and reduction ratios. The motor speed increases by about 20% under no load conditions. The motor is a 3-phase induction motor with AC200V, 4P, operating at frequencies of 50Hz and 60Hz.

Procedures: Installation instructions for the geared motor, emphasizing the use of an enclosed adjust bolt for centering the jack with an accuracy of 0.1mm. Installation of size 005 and 010 jacks and gearbox units is outlined.

Norms and Standards: Use of a brake motor for driving force due to the lack of a self-locking feature in ball screws compared to trapezoid screws. Insulation grade and protection method for the motor are specified.

Recommendations: For high-speed operations, a larger lead ball screw is recommended for reduced noise and higher efficiency. Guidelines for permissible axial direction load and operation speed are provided.

Data and Charts: Includes tables and charts detailing operation speed, load capacity, efficiency, and power requirements for various motor and jack configurations. A load-velocity chart ensures operations are within safe limits.

Key Parameters:

Motor Capacity: 60W and 90W
Voltage: 200V
Frequency: 50/60Hz
Braking Torque: 0.5Nm
Efficiency: Varies with load and speed

Limitations: Highlights the lack of self-locking in ball screws and the need for brake motors. Specifies maximum input speed and standard stroke lengths for different configurations.

Best Practices: Ensure accurate centering during installation and adhere to specified load and speed limits to maintain operational safety and efficiency.

Switches and Encoders Overview: Technical specifications and handling procedures for various types of switches and encoders, including counter switches, cam switches, and electronic counters.

Counter Switch Specifications:

Types: L02, L12, L04, L14
Display: Red and white letters
Setting Range: 0000 to 9999
Switch Type: V5514D (Panasonic electric) [AC250V-5A]
Allowable Input Speed: 2000rpm
Ambient Temperature: -20°C to 70°C
Humidity Range: Less than 85% RH
Direction of Rotation: Clockwise (CW)

Cam Switch Specifications:

Types: C02, C12
Setting Method: Adjustment of cam position
Allowable Input Speed: 2000rpm
Cam Revolution: 1000:1
Ambient Temperature: -20°C to 70°C
Humidity Range: Less than 85% RH

Encoder Specifications:

Type: Incremental
Power Supply Voltage: DC5-12V ±5%
Output Signal: 90° phase difference, 2 signals
Max Reaction Speed: 30KHz
Allowable Max Speed: 6000rpm
Temperature Range: -10°C to 70°C

Electronic Counter Specifications:

Type: G48-315
Display: Backlight LCD, 6 digits
Setting Range: -99999 to 999999
Input Mode: Connection/open collector
Count Speed: Selectable 30Hz, 1kHz, 5kHz
Power Supply: AC100-240V, DC12V
Protection Structure: IP54

Handling and Setting Procedures:

Counter Switch: Involves unfastening screws, adjusting ring letters, and ensuring correct alignment.
Cam Switch: Requires loosening screws, adjusting cam positions, and ensuring correct alignment with micro-switch rollers.
Encoder: Transmits input shaft revolution as pulse signal, compact design for direct mounting.
Electronic Counter: Involves setting pre-scale values, decimal positions, and output modes.

Wiring and Connection: Detailed wiring diagrams are provided for each type of switch and encoder, specifying terminal connections and power supply requirements.

Notes and Recommendations:

Ensure display figures are centered during setup.
Check spacer positions and clearances to prevent gear damage.
Confirm cam positions and tighten adjustment screws adequately.
Follow specified procedures for setting and adjusting switches and encoders.

Specifications and Setup Procedures:
1. The system starts in acting mode upon power on. The pre-scale setting can be adjusted using the MODE key, with a default factory setting of 1.000. Desired values can be input using keys 1-5 and are automatically saved after 3 seconds or when the mode is changed.
2. For double setting types, both set 1 and set 2 can be displayed using the DISP key. Negative values can be input using the upper figure key.

Technical Data and Maintenance:
- Detailed technical data on allowable lateral loads, shaft holding lengths, and input shaft overhung loads for various models (JA, JB, JTA, JTB).
- Specifications for oil and grease quantities, recommended lubricants, and the importance of using guides to prevent screw shaft bending.

Q&A Section:
- Methods for controlling stroke include installing a counter switch and coder on the input shaft.
- Concerns about screw shaft detachment are addressed with the presence of a stopper.
- Oil lubricants are preferred over grease for better efficiency and high-speed operations.
- For environments with dust or water, the use of bellows is recommended.

Parts List:
- Detailed parts lists for various sizes and models, including input/output oil seals, bearings, and grease fittings.

Additional Notes:
- Includes graphs and tables illustrating lateral loads and shaft holding lengths, emphasizing the importance of not applying lateral loads on certain models and using guides to prevent bending.
- Special materials for bellows are available for different environmental conditions, such as neoprene for heat and chemical resistance and steel for durability.

Catalog excerpts

JB005&010 shaft end connecter, Installation JB025-1250 shaft end connecter, installation Nominal capacity, reduction ratio … 6 JA005&010 shaft end connecter, installation JB life time traveling distance ……… 42 Model number selection ………… 7 JA025-1250 shaft end connecter, Installation 25 JA002 shaft end connecter, installation 27 JTA allowable axial direction load 49∼50 JB capacity table (reduction ratio H) JB capacity table (reduction ratio L) JA capacity table (reduction ratio H) … 15 JB allowable moving load/moving JA capacity table (reduction ratio rate L) 16 velocity (reduction ratio H) ……...

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Create fostering unique technology Prominent jack Keep ahead of the industry Challenge the unlimited possibility 005&010 jack system example 76 Bevel jack outline dimension ……98 JYB025-200 outline dimension table 005&010 jack, motor specification, Accessory (stroke controller) …99 Bevel jack nominal type basic specification …97 Counter switch (type W) specification structure 100 Motor/gear motor/bevel gear … 64 High lead specification(JAH type) 78 Counter switch (type W) setting dimension table 101 Capacity table with motor … 65 Counter switch (type L) specification structure 102 Outline dimension...

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List of products JB standard type please select according to app;ocation. And requiremeent Screw type Ball screw Nominal capacity(KN) Screw shaft direction Input arrangement Screw shaft end design With bellows With screw stopper With motor With greared motor With hydraulic motor Stroke controller With counter switch With encoder With electronic counter Reduction ratio Driving machine Jack specification Trunnion bracket Lubricant Fittings method Page grease lubricant grease lubricant grease lubricant grease lubricant grease lubricant grease lubricant Self lock Efficiency ●Can be manufacture ▲require...

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NX BX bavel gear jack ・ Roller bearing Roller bearing Trapezoid & roller bearing Screw type Nominal capacity(KN) Input arrangement Reduction ratio With bellows With screw stopper With motor With greared motor With hydraulic motor With counter switch With encoder With electronic counter Trunnion bracket grease lubricant grease lubricant Screw shaft direction Screw shaft end design grease lubricant Reducer grease lubricant grease lubricant grease lubricant grease lubricant grease lubricant Screw yes Self lock ●Can be manufacture ▲require meeting ×can't be manufactured or not required

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Nominal type Shaft arrengement Screw shaft direction Reduction ratio Screew shaft end design With whirl stop Motor gear motor Position controller No Without bellows J With bellows Clevis end Screw end Flange end Plane end H Movingspeed high L Moving speed low Uprlght type Input shaft rotation direction Movlng direction Uprlght type Input shaft B(with motor) Scerw shaft A(with motor) Motor and gear motor Input shaft rotation direction Uprlght type Input shaft rotation direction Load direction Movlng direction Uprlght type Input shaft rotation direction Movlng direction Load direction Load direction...

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Nominal capacity. Reduction ratio Trapezoidal screw Type Ball screw Note:actual ratio H is one third of L (H=L/3) Note:JAS type, size 025-100 Note:JAH, size 025-100] Note:actual ratio H is one third of L (H=L/3) Note:JBH type, size 025-200 With motor

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Model number selection (5)Calculate required power (Pw) per following Required condition for selection Push-pull force W: load of each jack (kN) Support condition of load Ｖ: operation speed (m/min) (2) Operation conditions Stroke Operation speed η : jack efficiency (decimal) ＪＮ: input shaft speed (rpm) Input shaft speed Ｔ1: torque of jack, no load (N・m) (3) Condition of use With or without screw shaft stopper Operation speed Prime mover Number of condition (screw jack) (4) Actual operation conditions Ｒ:reduction ratio Installation, mounting position (6)Take the transmission efficiency in the...

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Example of selection Use two sets of jacks in the following equipment, and lifting stroke is 300㎜ in a minute, please select the jack model number. In addition, the usage load of one is 30KN, and the jack is self lock. (1） Select JA type from the list of products. (2） According to basic specification of JA (E-14), select JA050-H whose nominal capacity is 50KN. (3) It is suitable since 50KN at operation speed of −0.3m/min is permissible operation load per load speed chart (E-17). (4) Observe curve 2 of permissible axial direction load (E-20) ηf＝1 L＝530 it is suitable since permissible axial direction...

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System example Example 1 saving space Example 5 saving power Counter Shaft Motor Jack with gear box Example 2 equally distribution Example 6 equally distribution SW Encoder Jack Reducer with motor Counter Shaft Jack Motor Example 3 Effectively use middle of equipment Example 7 Effectively use middle of equipment Geared Motor Jack with gear box Jack with gear box Reducer with motor Jack with gear box Counter Shaft Example 4 equally distribution of power Example 8 equally distribution of power Geared Motor Reducer with motor Counter Shaft

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Installation position Standard mounting UP Oil filler Plug Oil level gauge Drain plug Special assemble (please send out instruction) ①Ceiling mounting type01 ②Input shaft vertical type 02 Drain plug ③Input shaft top type 03 ④Input shaft bottom type 04 Oil filler Plug Oil level gauge Drain plug Drain plug

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Permissible load of jack while rest and operating is equal or not. permissible load at rest is more than 1.2-2 times of operating load. R e s t The force to rotate toward same direction as worm wheel is acting on screw shaft. Function of whirl stop is to stop rotation of screw shaft. and to change that force into thrust. Can hold 1.2-2 times more Why need screw shaft whirl stop Guard against rotate together must have lock pin What is the difference between trapezoid screw and ball screw? Trapezoid screw has self protection (self-lock) function. It has excellent safety such as prevent falling....

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