Screw Jack Series(NJ・NJV・TJ・BTV・RJ・JA・JTA)
Ball Screw Jack Series(BSJ・BXJ・BJV・BTJ・BTV・JB・JTB)

INSTRUCTION FOR
INSTRALLTION AND MAINTENANCE
Contents
General Precautions .................................................... １
Definitions and Symbols .............................................. １
Recommended conditions for Products ....................... ２
Product type to be explained in this instruction............ ２
To use our products safely ........................................... ２
Inspection upon our product ........................................ ４
Precautions on relocation ............................................ ４
Precautions on mounting ............................................. ５
Precautions on connection to a machine ..................... ６
Precautions on operation ............................................. ７
Handling the accessories............................................. ９
Daily inspection maintenance ...................................... 10
Recommended oil and grease and its capacity ......... 11
Daily and periodic inspection ....................................... 13
Trouble shooting Information ....................................... 14
The Product warranty .................................................. 16

This Instruction Document must be read thoroughly installing or operating Screw
Jack series or Ball Screw Jack series so that unit would be used for long time.
Get through the instructions contained herein before installing and operating the
product. Keep this document available on file for future reference.
Regardless of the warranty period, contact your local distributor or service section when
you want to inquire about our productMakishinko Co., Ltd
4-206 Shin-Tanimachi Dai 3 Bld.7-chome, Tanimachi, Chuo-ku,
Osaka 542-0012 Japan
Tel. 06-6763-2101 Fax 06-6763-2100
E-mail eservice@makishinko.co.jp

■ General Precaution●

This Instruction document should be made available for setting
companies to install our products.
In the case of installing (or operating) our products, please make clear thecautions and attentions during operating them to end users, besides giving thisbook.
● This Instruction Document must be read thoroughly when the end users install or
operate Screw Jack series or Ball Screw Jack series.
Setting companies: User to install our products.
End users: User to operate actually the products to be installed.

Caution● Leave the treatment of the products to qualified or well-experienced engineers intheir relocation, installation, use, operation, maintenance and inspection.
● Unauthorized modification of the product will nullify Makishinko accountability
for its warranty.
● Don't use the product for other purposes and manners than those designated in
its nameplate, so that our products are damaged.
● When you discard the product or used lubricating oil, treat it as general industrial
waste.

■ Definitions and Symbols
Negligence of those instructions contained herein may result in injury and/or damage.
In this document, potentialities of injury and damage are classified into "Danger",“Caution” and "Notice", depending on the extent of their seriousness. Theirdefinitions are as follows.

DangerWarning
Caution

Negligence of this precaution will produce a dangerous condition, which
may result in major injuries or death.
Negligence of this precaution will produce a dangerous condition, which
may result in major injuries or death.
Negligence of this precaution will produce a dangerous condition, which
may result in moderate or minor injuries and/or damage.

1

■ Recommended conditions for Products
Temperature-15℃ ～ 80℃
Humidity
80% or below(no dewdrops)
There is no erosion gas and powder dust

■ Product type to be explained in this instruction
NJ,NJV, JA ・Screw Jack (Standard Type)

BSJ・Ball Screw Jack

(Standard Type)

TJ, ,NTV,JTA・Screw Jack (Traveling Nut Type)

BXJ, BJV,JB・Ball Screw Jack

(Standard Type)・Screw Jack

RJ

(Reverse Load Type)

BTJ, BTV,JTB ・Ball Screw Jack(Traveling Nut Type)

1. Comparison table between new and old model
Old model
NJ,NJV
TJ,NTVBSJ
New model
JA
JTA－

BXJ,BJVJB

BTJ,BTV
JTB

RJ
JA

2. Comparison table between new and old typeOld model
NJ, NJV,TJ,NTV, BSJ, BXJ,BJV, BTJ,BTV, RJ(The type shows the distance from center of Jack )New model
Old type
New type

JA, JTA, JB, JTB (The type shows the load dose )
－
25
32
40
50
60
70
002
005
010
025
050
075
100

Old type
New type

100
300

120
400

135
500

155
750

175
1000

195
－

80
150

－
200

90
250

200
1250

■ To use our products safely
Before installing and operation our products, the following cautions must
be read thoroughly, understood and fulfilled.

Danger● Don’t use our products in an explosive atmosphere. Its use in such an atmosphere may
cause an explosion, ignition, fire, electric shock, injury or damage.
● When the product is lifted up for relocation, don't step in the area below the product. Its
accidental drop will result in injury and/or death.

Warning● Check to see that the supply current does not exceed the rated one mentioned on the
product's nameplate.

2

● During operation, keep away from the products and their elevating parts in order toprevent an accident resulting in injury and/or damage, which is caused by the productstart or the sudden fall of their elevating parts.
● During operation, don't touch the rotating parts such as shafts. If you touch them, it may
cause an accident resulting in injury.

Caution● Use always lifting bolts or other lifting devices to prevent the injury and/or damage
caused by the damage of lifting bolts, dropdown or turnover of the product.
● Don't touch the product's shaft key way with a bare hand to avoid the injury.
● When you relocate the product, don't hold its shaft end or don’t attach the lifting belt tothe shaft.
● Before starting operation of the product, exchange the attached air freezer.
If you are failed to do, neither oil nor grease leaks from the product.
● Adjust to proper centering. Improper centering work causes to the product's mechanicaltrouble or the expiration of its service life.
● Periodic replacement of grease is required to the prolongation of product’s service life.
● Check to see that the proper capacity of lubricating oil is filled before starting theoperation.
A lack of lubricating oil causes to the product damage.

3

■ Inspection upon our productUpon the delivery of the product, conduct the following inspections.

Caution
Before opening the package of our product, conform the upper and lower sides of it,which may drop down or turn over.
● Check to see that the delivery conforms to your purchase order.
● Check to see that the product is intact without damage during transportation.

● When you don’t operate the product at once and hold it for a time, install it in the dry andwell-ventilated area,■ Precautions on relocation
Take a good care of the following matters when you relocate or transport
the product.
If you lift the product with the device such as a wire, use thelifting device such as a bolt to prevent an accident resulting ininjury and/or damage to be caused by the sudden fall.
Don't tie the input shaft or the screw shaft directly with a wire,and don’t touch it with a bare hand.
(If you have no lifting bolt, please hang the product on the nylon
sling, lifting in two points such as case and the other proper parttightly and safely.)

Danger● When the product is lifted up for relocation, don't step in the area below the
product. Its accidental dropdown will result in injury and/or death.

● When you carry the screw shaft of Ball Screw Jack series, don’t forget to fix its end.

Caution● Use always lifting bolts or other lifting devices to prevent the injury and/or damage
caused by the damage of lifting bolts, dropdown or turnover of the product.
● Don't touch the product's shaft key way with a bare hand to avoid the injury.
● Take a good care of the product when you relocate or transport it, which may drop downor turn over.

● When you relocate the product, don't hold its shaft end or don’t attach the lifting belt tothe shaft.

4■ Precautions on mounting
When you mount the product, observe the following environmental
conditions in its installation area.
● The direction to be mounted
Check to see that the mounting surface of unit is proper.
Inadequate direction may cause the damage of the product's bearing, gear tooth andshaft.
● The stand to be mounted
Before mounting the product on your machine, check to see that the machine's
construction and rigidity conform to the product. Inadequate construction and rigidity ofthe machine will generate abnormal vibration and cause an accident resulting in injury
and/or damage.
● The surface to be mounted
Check to see that the mounting surface of unit is washed in order to keep the productadequate angles of screw shaft.
Support the mounted surface to be stained with painting and rust-proof enamel.
● Adjust to proper centering. Improper centering work causes to the product's mechanicaltrouble or the expiration of its service life.

Caution● Adjust to proper centering. Improper centering work causes to the product's mechanicaltrouble or the expiration of its service life.
● BoreThere is the bore part on the mounting surface to adjust the proper place. To adjust thecenter of screw shaft and the center of the elevating system, process it on the mountedbase.
● Eccentric load
When you connect the screw shaft with the elevating part, adjust
the proper mounting.
The product has the screw guide. But take good care of theeccentric load or horizontal load.
For the upright model on a base plate, we recommend to use theguide roller, the guide shaft and so on.
● Mounting of NJ, RJ, BSJ, BXJ, JA, JB model
Mount the screw shaft of them to be at right angle to the surface of them.
● Mounting of TJ, BTJ, JTA, JTB model
Mount the screw shaft of them to be parallel to the surface of them.
● Mounting of the long stroke model
Take measure to avoid horizontal load.When you mount the product on a base plate or aflange, tighten its bolts at a designated torque by lifting the screw shaft (in the case of NJ,
RJ, BSJ, BXJ) or the traveling nut (in the case of TJ, BTJ).

5■ Precautions on connection to a machine
When you connect the product's shaft to a load or a motor, check thefollowing matters.

Caution● Check to see the connecting permissible accuracy when they are connected to eachother directly. If such connections are destroyed during operation, they may cause theproduct damage and/or machine damage.
● Before connecting the product to a machine, make sure of their rotating directions.
Rotation in a wrong direction may cause injury and/or damage.
● Don't touch the rotating parts. Cover them with protective guards to prevent an accident
resulting in injury.

● Install the non-rotate device to the screw shaft of the ball screw jack, in order to preventthe injury caused by dropdown accident● Adjust to the proper centering position in connecting to anothermachine.
● Input shaft, screw shaft’s end
・Wipe off the rust inhibitor from the product's screw shaft end or input shaft with a solvent
such as thinner. Notice the shaft oil seal not to be strained with its solvent to avoid the oilseal damage.
・Fit quality of the shaft with a coupling should be around H7 (JIS B 0401) and key system is
introduced B 1301-1976(New JIS)(the parallel ordinary sized key model).
・When you attach a coupling, sprocket or gear to the product's shaft, treat the shaft withgrease for anti-seizure and don't give the physical force unjustly to the product's bearing to
avoid damage.

● The connection device to the machine・ When you connect the shaft of our product to the machine’s shaft with a coupling
Adjust the centering of the shaft to follow the recommended proper by the couplingmaker in the above work.
・When you connect the shaft of our product to the machine’s shaft with a pulley or sprocket
Connect them rightly, using the recommended proper belt tension or pulley tension by the
maker.
The tightening or slack of the belts or pulley may generate stress on the product.
Position sprocket or pulley as close to the product body as possible so that the shaft can
carry loads at its root. If the load point is in the edge of the shaft, it causes to the productdamage.

● Fixing of metal attachments on the shaft end
・ C (Clevis end)
The connecting pin must be made from the tenacity materials and you should retain it.

6

・ S (Screw end)
Tighten the screw end after screwing down it. Without fit drive in the screw shaft, please
mount the fit drive device to be rigid regarding the screw torque・ F (Flange end)
Without fit drive in the screw shaft, please mount the fit drive device to be rigid regarding
the screw torque.

■ Precautions on operation
Before starting the operation, check the following matters.

Caution● When you use the product at first time, exchange fasten plug for attached air
breather. If you forget to mount it, the leak of lubricating oil may cause injury and/or the
product damage.
● Whenever you notice something abnormal, stop operation immediately to avoid
injury, fire and/or the product damage.
● When you want to mount the product without our recommended design, get intouch with your local distributor or our service section.
The leak of lubricating oil or grease may cause injury and/or the product damage.
● Check the lubricating oil or grease
Check to see if the product is filled with the standard amount of lubricant
Oil bath lubricating type: To be the oil surface in the center (NJ, TJ, JA, JB, JTA, JTB, BSJ type)
Grease lubricating type: To fill grease to the grease nipple and to drain it from the relief fitting. (RJ type)

When there is a shortage of the lubricating oil or grease, add the same recommended
lubricating oil or grease as it is used.
● Check air vent cock
For the grease-lubricating product, grease is sealed
in it in our factory before its delivery to avoid oilleakage.
When you use the product at first time, exchange
fasten plug for attached air breather. In the case ofBall screw Jack with an air breather, mount theattached air freezer in exchange for the plug.
Square-head plug

Oil surface gauge

Air breather

Attached air breather

Oiling cap

Oil surface gauge
Drain oil cap

Drain oil cap

Mount air breather

7

● Fitting operation
The worm wheel gives full play to its ability by fitting operation. Please operate it for twoor three hours by adding between 1/3 and 1/2 load of the rated load in starting operation.

Caution● Whenever you notice something abnormal, stop operation immediately to avoid injury,
fire and/or the product damage.
● Don't operate the product at a load exceeding its rated capacity to avoid injury, fire and/or
the product damage.
● Don't operate the product at a rotation exceeding its rated capacity to avoid injury, fire
and/or the product damage.
● Cautions on the stroke
The stroke can overrun up and down in both direction within 5mm to 30mm.
When the stroke overrun more than above width, the screw shaft will be stopped at theplace where the stopper to be mounted with the screw shaft bump the case stopper
But don't try to conduct any work when the product is energized. Always turn off thepower switch supply to avoid the product damage. So that the screw shaft is locked then,you must take off the cover of the output shaft. We recommend you to use the safety
device such as torque limiter and so on. But the over load for the stopper may cause theproduct damage

CautionCheck to see that the supply current does not exceed the rated one mentioned on the
nameplate. If the stroke is over, the screw shaft is locked. Then the over load for the stopper
may cause the product damage● Caution during operating
Keep away from the products and their elevating parts. When you must approach tothem, turn off the power switch and then operate after confirming the full safety bypropping up the elevating part.
Turn off the power switch

Prop

Cautions during operation

Caution● During operation, keep away from the products and their elevating parts in order toprevent an accident resulting in injury and/or death, which is caused by the product startor the sudden fall of their elevating parts.

8■ Handling the accessories● One with bellows
The standard bellow is made from nylon tarpaulin. Whenever you work in such badenvironment as outdoor or the area filled with dust or cutting powder.

● One with key to avoid rotating(NJ, RJ, JA)
This is the type that the screw shaft is possible to move up and down in itself. The key isfixed to cover of output screw and the key way is in the screw shaft.
After being used for a long period of time, its frictional face wore out, widening the gap
between the brake disks. When the key way exceeds a certain distance, excitation of
the screw shaft does no longer activate its armatures. Then replace it.

● One with the motor
This is the type the flange type motor is connected directly to the product by coupling.
As it adopts the oil bath system in reduction part, it can move at high speed. (Confirm
the attached instruction written by the motor maker.)● One with the bevel gear box
This is the type the bevel gear box is connected directly to the product. As you canposition input shaft at right angles to the standard input shaft direction, it is useful toconnect many devices.
Don’t add the over hung load on the bevel gear side.

9■ Daily inspection and maintenance
Please take care of the following matters in daily inspection andmaintenance.
● Replacement of lubricating oil
In the case of oil bath lubricating type, replace it at the first time after 50 hours. After then,you should replace it in every 6 months. Especially, the first replacement is required toremove the wear dust in the fitting operation.
In the case of grease lubricating type, fill grease to the grease nipple and to drain it fromthe relief fitting. (RJ type)

Caution● Periodic replacement of grease is required to the prolongation of product’s service
life.
● Replacement of lubricating grease in the part of screw shaft.
Screw shaft employs the grease lubricating system, it is recommended to replace withnew grease in about one week in the initial operation. In replacing the grease, wipe off
old grease then supply new one. When you don’t operate the unit for long time (over 6
months), we recommend to replace grease with new one before using it again.

Caution● Wipe off old grease in screw shaft periodically and supply new one.
It will prevent undesirable accidents and prolong the product's service life.
● When you do not operate the unit for a long time
You must operate the unit two or three to-and-fro movement a month to keep the innerpart free of rust.
● Inspection of internal thread wear(NJ, TJ, RJ, JA, JTA)
Check the amount of the wear. When the thread of the screw becomes about 1/3, supply
new one.
● Caution on the environmental condition
When you mount the product on a machine like a food processor, which must be fee ofindustrial oil, provide an oil pan or any other adequate measures against possible oilspillage caused by the product's mechanical trouble or the expiration of its service life.
When you discard the used lubricant of the product in Japan, you may treat it as generalindustrial waste.

10

■ Recommended oil and grease and its capacity(Table-1) Oil lubrication
Ambient temperature-15℃ to 40℃

40℃ to 80℃

ISO Grade

VG 150

VG 320JIS Grade

K2219 -class2 No.4

K2219 -class2 No.6

Mobil oil

Mobil Gear 629

Mobil Gear 632

Idemitsu oil

Daphne Super Gear 150

Daphne Super Gear 320

Shell oil

Omara #150

Omara #320

Esso oil

Spartan EP 150

Spartan EP 320

Nippon oil

Bonnox M 150

Bonnox M 320

Jomo oil

Reductus EP 150

Reductus EP 320(Table-2) Grease lubrication
Ambient temperature-20℃ to 80℃

Mobil oil

Mobilux EP 2 (SHC 460)

Idemitsu oil

Daphne Eponex SR 2

Showa Shell oil

Sunlite EP 2 (Alvania EP 2)

Nippon Mitsubishi oil

Epinox AP 2

We use Showa Shell oil Omara #150 lubricating oil and Idemitsu Daphne Eponex SR 2 grease.
※Model Type 002 use Nippon oil Bonnox M 220 lubricating oil (ISO VG 220)11

(Table-3) Capacity of oil and grease
Model

Oil(ℓ)Grease(g)(Reduction unit part)
NJ,TJ,NJV
BSJ,BXJ,BTJ
NTV,JA,JTA
BJV,BTV,JB,JTB

GreaseGrease (Screw unit part)

RJ

NJ,TJ,NJV
NTV,JA,JTA

RJ

BSJ,BXJ,BTJ
BJV,BTV,JB,JTB

(002)

0.07ℓ

-

-

5g

-

-

25 (005)

40g

40g

-

8g

-

8g

32 (010)

50g

50g

-

10g

-

10g

40 (025)

0.3ℓ

0.3ℓ

-

40g

-

30g

50 (050)

0.5ℓ

0.5ℓ

-

50g

-

40g

60 (075)

0.8ℓ

0.8ℓ

800g

60g

60g

50g

70 (100)

1.0ℓ

1.0ℓ

-

80g

-

60g

80 (150)

1.2ℓ

1.2ℓ

1200g

100g

100g

70g

(200)

1.3ℓ

1.3ℓ

-

110g

-

90g

90 (250)

1.8ℓ

1.8ℓ

1800g

120g

120g

90g

100 (300)

2.6ℓ

2.6ℓ

2600g

150g

150g

110g

120 (400)

4.0ℓ

4.0ℓ

4000g

180g

180g

130g

135 (500)

6.0ℓ

6.0ℓ

-

220g

-

160g

155 (750)

8.0ℓ

8.0ℓ

8000g

280g

280g

200g

175 (1000)

10.0ℓ

10.0ℓ

-

350g

-

250g

195

-

-

1000g

-

400g

-

200 (1250)

12.0ℓ

12.0ℓ

-

450g

450g

320g

Model RJ and Type 25(005),32(010) adopts the grease-lubricating system in the reduction part, so capacityof grease is listed.
Capacity of grease (Screw part) is listed when stroke size is 300mm.

12

■ Daily and periodic inspection(Table-4) Daily and periodic inspection
Item
Confirm amount of oil (grease) in
the speed reduction section
Supply grease into the screw
shaft

Daily inspection
Check before operation every day
Frequent use(Less than 10～30 times par day)In the case of Ball Screw Jack
(More than 30 times par day)

Replace grease in the speed
reduction section
Replace grease in the screw shaft

Periodic inspection

Frequent use(Less than 10 times par day)In the case of Ball Screw Jack(Less than 30 times par day)The beginning andEvery 2 ～ 6 months
The beginning andEvery 2 ～ 3 months
Every 2 ～ 12 months
Every 2 ～ 12 months
Every 2 ～ 3 months

Loose bolts
External surface damage
Wear of the internal thread(NJ, TJ, RJ, JA, JTA)
Screw shaft damage
Every 2 ～ 12 months
Bellows damage
Every 2 ～ 12 months
Locking gap
Every 2 ～ 3 months(NJ, RJ, JA)
Clean the screw shaft
Every 2 ～ 3 months
Other items to be checked
The stroke for the frequency in usage is showed in the case of 300 mm. The stroke correlates closely withthe frequency in usage,

13

■ Trouble shooting Information
Whenever you notice something abnormal such as the followings, stop the operation
immediately to avoid an accident.
ProblemCausesRemedies

Overload

Check loading and adjust to adequate level

Excess or insufficient grease

Add or remove the grease to adequate
amountOverheating

Improper grease or oil

Change to recommended grease

experienced(#005 and #010)
Change to recommended oil(#025 to #1250)

Regularnoise

Highmetallic
Abnormalnoisebuzzes

Improper adjustment of bearing

Contact Makishinko

Improper gear contact

Contact Makishinko

Bearing damaged

Replace with new bearing

Improper adjustment of coupling

Adjust to proper alignment

Incorrect bearing preloaded

Contact Makishinko

Insufficient grease of gearing

Add grease to proper amountsection(#005 and #010)

Luck of grease in screw shaft

Flush and replace with new grease

Foreign matter in unit

Flush old grease and change with new(#005 and #010)

irregular

Flush old oil and change with newnoise(#025 to #1250)
Lateral load on screw shaft

Adjust to proper mounting

Unstable continuous operation

Adjust to proper mounting

Wear of gears

Replace with new gears

Foreign matter in unit

Flush inside and add new grease(#005 and #010)

Unusual vibration

Bearing damaged

Replace with new bearing

Looseness of mounting bolts

Tighten the bolts after confirmed adjustment
of input and screw shaft

Improper mounting adjustment

14

Adjust to proper mountingProblemOil leaking

CausesRemedies

Oil seal damage

Replace with new seal

Packing damage

Replace with new packing

Lack of tightening the drain

Tighten the drain plug by seal tapeplug
Oil surface gauge damage

Replace oil surface gauge

Air vent cock failure

Take off red oiling cap or replace air vent cock

Worm gear distorted

Contact Makishinko

Screw shaft distorted

Contact Makishinko

Input and screw shaft

Locking condition at excessive

Disassemble unit and replace part if needed

will not rotate

stroke position

Slipped

input

shaft

and will not up screw
shaft
Falling down screw

Bent screw shaft

Replace screw shaft

Bearing damaged

Replace with new bearing

Foreign matter in unit

Contact Makishinko

Wear of gears

Replace gears

Damaged key

Replace key and relative parts

Damaged input shaft

Replace input and wheel

Damaged internal thread

Replace parts

Damaged internal thread

Replace parts

Falling down ball

Replace parts

shaft
Falling down screw
shaft of the Ball Screw
Jack
The mentioned above matters are general troubles. When you find something abnormal as a result of yourdaily or periodic inspection, get in touch with your local distributor or us without delay.

15

■ The product warranty
The warranty period and limits(1) When the trouble happens in the shorter period either 18 months after installing our
product or 12 months after operating the product and it is caused obviously by our
responsibility on design or produce, we will repair it without charge or install thesubstitute for trouble product or/and part.
(2) When you use the product in one of overseas countries, we will decide the warranty
contents after other previous arrangement. Without this arrangement, we will deliver thesubstitute product or/and part.
.

Beyond the limits of the warranty
The following matters are beyond the limits of the warranty.
(1) The damage or trouble of our product to be caused by your mistake operation(2) The damage or trouble to be caused by your disassembling and reassembling of our
product(3) The damage or trouble of our product to be caused by natural calamity such as
earthquake and flood, fires or other special external accidents(4) Replace the expendable supplies

Regardless of the warranty period, contact your local distributor or service section when
you want to inquire about our productMakishinko Co., Ltd
Head Office

4-206, 7-chome, Tanimachi, Chuo-ku,Osaka 542-0012 Japan
Tel. 06-6763-2101 Fax 06-6763-2100
E-mail eservice@makishinko.co.jp

Overseas section

4-128, 7-chome, Tanimachi, Chuo-ku,Osaka 542-0012 Japan
Tel. 06-6768-5671 Fax 06-6763-2100
E-mail kaigai01@makishinko.co.jp

Nabari Factory
2832, Natsumi, Nabari-city, Mie 518-0441 Japan
Tel. 0595-63-1031 Fax 0595-64-5435
Shijounawate Factory 12-7, 1-chome, Okayama, Shijounawate i-city,
Osaka 575-002 Japan
Tel. 072-877-1781 Fax 072-879-5117

16