Since 1978Since 1978

MANUFACTURER

APEX PRECISION TECHNOLOGY CORP.MANUFACTURER

APEX PRECISION TECHNOLOGY CORP. JAPAN BRANCH OFFICE

PLT JAPAN CO.,LTDJAPAN BRANCH OFFICE

PLT JAPAN CO.,LTD

www.plt.com.tw

Precision Arbor PressOperation Manual

[ Model:GR-338 ]

錩錩 鋼鋼錩錩 鋼鋼

Intellectual Property Right. Copying is not permitted.

Contents

Equipment Specification

Spindle Structure

Slide Base Stroke Adjustment

Spindle Fine Tuning

Adjustment of the Haft Handle

Foolproof Mechanism

Counter

Bottom Base and Jig Installation Notice

Maintenance

Page

We reserve the right to make changes, subject to change without notice

-1-

Equipment Specification:(See Figure 1 ) Model: GR-338

Capacity: 50kg

Working height: 60mm～210mm (adjustable)

Spindle under pressure stroke: 50mm

Spindle fine tuning upper and lower space: 10mm (every 0.05mm)

Die head collect specification: ER20N-A nutER20-A wrench 30mmER20 spring collet (4mm～13mm)according to customer’s requested inner diameter

Table dimension : 150(W)*120(D)*center hole ø25

T-slot specification: #10

T-slot screw: M8

Machine fixed screw space: 187*140(M10*4PCS)

Counter: Mechanical, “5” digits

Position indicator: Mechanical, “4” digits

Machine dimension: 220mm (W) 240mm (D) 500mm (H)

Machine weight: 38/kgStandard accessories

Item Designation Specification Quantity1 T nuts #10 (M8 x P1.25) 2PCS2 Metric hexagonal wrench set 1PCS3 ER20-A wrench 1PCS4 Socket-head screw M10 x P1.5 x L35 4PCS5 Spring washer M10 4PCS6 Flat washer M10 x 2T 4PCS

-2-

Description:

Figure 1 Equipment Specifications

A-A Enlarged view

T nut dim.

T slot dim.

Mac

hine

hei

ght M

AX

-620

, MIN

470

Spin

dle

unde

r pre

ssur

e st

roke

50m

m

Lifti

ng st

roke

140

Spin

dle

stro

ke w

orki

ng h

eigh

tM

AX

-210

, MIN

-60

-3-

Spindle Structure:2.1. Spindle Structure Part Name:

Figure 2 Spindle Structure

Spindle

Spindle guide rod

Scale cursor

Stroke guide tube

Upper spring retainer

Spring mounting pin

Spin

dle

tele

scop

ic sp

ace

Fine

tuni

ng sp

ace

0~10

mm

Und

er p

ress

ure

spac

e50

mm

Scale indicator fixing screwsM4*6

Spindle fixing handle

Scale cursor

Spring washer

Stroke guide tube

Scale ring fixing screwScale ringFine tuning nutWave springScale indicatorSpring fixing pinUpper spring retainer

Regression spring

Lower spring retainer

Slide base

-4-

Spindle Structure:2.2. Regression Spring Replacement:2.2.1 Remove the spindle fixed handle and the cursor.2.2.2 Clip the “scale” with a duckbill pliers.2.2.3 Unscrew hexagon socket screws-M6 and rotate the scale counter-

clockwise and take out the scale ring and wave spring.2.2.4 Unscrew 6 pieces of hexagon socket screws-M6 and take out the scale

indicator.2.2.5 Remove the “fine tuning nuts” by turning counter-clockwise.2.2.6 Remove the “fixing screws” by turning counter-clockwise with a 6mm

fixing spanner.2.2.7 Remove the spring.2.2.8 Remove the upper spring retainer.2.2.9 Remove the lower spring retainer.2.2.10 Replace with new springs.2.2.11 Assemble the machine by backward steps.

2.3. Adjustable Handle – Adjustment Methods2.3.1 Pull out the handle outwards until it dispatches from the ratchet.2.3.2 Hold the handle to the left or to the right until it reaches the desired

position.2.3.3 Put the handle back to the ratchet and the adjustment would be done.

Figure 3. Handle Adjustment Methods

1. Pull the handle outwards.

2. Rotate the handle to the left or to the right until it reaches the desired position.

-5-

Spindle Structure:2.4. Spring Collet Holder –Install and Removal2.2.1 Fix the nuts (Refer to Figure 4)2.4.2 Hook the “spring collet” to the latch. (Figure 5)2.4.3 Push it to the center from the side of the collet.2.4.4 Push until a click is heard. (Figure 5)

2.4.5 Push the spring collet holder from the upper side to the nut latch (Figure 5).

2.4.6 The nut can be removed when it jumps out from the spring collet holder.

Figure 4

Figure 5 Figure 6

2.5. Die Head Dimension and Installation: 2.5.1 The die clip shall not be over 36mm. It will touch the bottom of the

spindle endospores. The collet will be damaged when the nut is screwed tight and the die will be skewed.

2.5.2 The die head must be more than Ø22 (so the die head will not shrink duringthe operation). The outer diameter of the die head design should fit the innerdimension of the collet. (Figure 7).

2.5.4 The die head shall be screwed tight to the nut when locking the collet.2.5.5 Loosen the nut clockwise and screw it counter-clockwise.

Figure 7 Dimension of the Die Head Figure 8 Installation Diagram of the Die Head

Finish

1. Push from the side of the latch.

2. The collet jumps out from the latch.

2. Push to the center.

1. Hook the groove to the latch.

Removal Installation

More than Ø22

Loosen the spring collet Main tapping

clockwise

Die head

Tighten the nut counter-clockwise

“Shoulder end face” must be closed to the “nut or collet” andthe nut can be tightened.

Eccentric circle

LatchNotch

-6-

Slide Base Stroke Adjustment:3.1. Upper and Lower Adjustment of the Slide Base 3.1.1 Loosen the 2 fixing handles.3.1.2 Rotate the handle wheel clockwise upwards and counter-clockwise

downwards to adjust to the desired working height. The position indicator shows the present height between the spindle and the table. (Figure 9)

3.1.3 Adjust the machine to the desired height and tighten the handle. 3.1.4 The maximum value for the position indicator is 999 mm. The minimum

value for the frist 3 digits is 1mm and 0.1mm for the forth digit.

Figure 9 Upper and Lower Adjustment of the Slide Base

Handwheel

Fixing handle

Adjust clockwise to lift the slide base

Adjust counter-clockwiseto lower the spindle

Maximum value 999(mm) Each grid 0.l mm

Position indicatorPosition indicator

Lifting the slide base –to a suitable position

Spin

dle

wor

king

hei

ght

MA

X-2

10, M

IN-6

0

-7-

Spindle Fine Tuning:4.1. Spindle Fine Tuning4.1.1 Loosen the fixing handle of the spindle and the scale fixing screws.

(Do not turn the scale before loosening the spindle or it may causedistortion).The smallest grid is 0.05 mm and each coil is 1 mm, adjust to the numberof the big direction (counter-clockwise), the spindle is elongated to the smallest direction and the spindle is shortening (clockwise).The scale ring of the display has back lash structure and it is available to beadjusted directly. (The fine tuning scale is adjusted to the upper and lower limit. Do not turn the scale or it will lead to the stick-locked effect. Please turning back to the “0” position and re-fine)Tighten the spindle fixing screws and the scale fixing screws.(Note 1: Please make sure the spindle fixing screw is tightened so that the accuracy won’t change during the operation.)(Note 2: The scale cursor is sometimes deflected and cause the interference of the guide tube interference. Please relocate the position.)

4.1.2

4.1.3

4.1.4

Figure 10 Spindle Fine Tuning

Loosen the scale fixing screwTighten the scale fixing screwNotice: Do not interfere

Scale cursor

The spindle is moving upwards and downwards when finetuning the scale.Moving distance 0~10mm

Loosen the spindle fixing screwTighten the spindle fixing screw

Slide base body

Spindle guide tube

Spindle

Die head

-8-

Adjustment of the Haft Handle5.1. Haft Handle Adjustment5.1.1 The adjustment of the haft handle is to enable the operator to fit the

design of the machine.5.1.2 The haft handle can be adjusted to the angle that fits the operator.5.1.3 Loosen the M6 screws and twist the handle base to a suitable angle

and tighten the M6 screws. Check the handle when pressing down after the adjustment and make sure the handle interfere with other part of the machine. (Figure 11)

5.1.4 Loosen the M6 screws and the handle can be stretched longer or shorter to the suitable angle. Make sure the handle interferes with other part of the machine after the M6 screw is tightened. (Figure 12)

Figure 11 Handle Base Angle Adjustment Figure 12 Upper and Lower Adjustment of the Handle

Loosen the hexagon socket screws-M6The angle of the handle base is adjustable

Loosen the hexagon socket screws-M6

Displacement of the handle length

Dis

plac

emen

t of t

he

hand

le le

ngthThe handle angle position

is adjustable

-9-

Foolproof Mechanism:6.1. Foolproof Mechanism6.1.1 Foolproof – it is a special designed confirmation to prevent defective

mechanism from manual operation.6.1.2 The handle cannot be regressed when it is not pressed to the bottom.

(It is that the spindle’s “die head” is pressed to the bottom and regressed that the work is done. (Figure 13)

6.1.3 The “handle” needs to be kept pressing to the bottom for regression whenthe “handle” is stopped and cannot be regressed.

6.2. Fool proof Mechanism – Troubleshooting6.2.1 The handle cannot be pressed down to the bottom and regressed due to

the workpiece failure. Troubleshooting must be preceded.6.2.2 There is a lever under the foolproof mechanism. Push the lever forward

and the lever can be regressed.(The lever must be held by the right hand so that it will not cause any inappropriate impact.) (Figure 14)

6.2.3 The foolproof mechanism is set up when it leaves the factory. Do not redeploy the mechanism again.

6.2.4 There is a l mm clearance between the foolproof mechanism when it is pressed down to the bottom dead center. It is a normal phenomenon for the structure design.

Figure 13 Foolproof Mechanism Figure 14 Troubleshooting

During the troubleshooting,the foolproof is pressed forward and settled.

Original status

Troubleshooting Lever

The handle is regressed when it is pressed down to the bottom.

A cycle is completed when it is regressed to the bottom

Maj

or st

oke

50m

m

Forward

-10-

Counter:7.1. Counter7.1.1 When the handle is pressed down once, the counter then “count” once

and keeps adding the counting number.7.1.2 Set to 0: Turning the knob counter-clockwise until the 0 shows up.7.1.3 Adjust the pole jack when there is no need for the counter.7.1.4 Please refer to the following figure for other details.

Figure 15 Counter

Foolproof mechanism

Counter

Counter swing arm

Press down the handle

Notice: Adjust the counter swing from lever when the "handle"is pushed to the bottom or the counter will be broken.Return to zero turning knob

Return to zero adjustment:Turning the knob counter-clockwise until all the 0 appears

Loosen the screw with a flatheadscrewdriver. The counter swing arm can be adjusted to the appropriate position or the counter doesn’twork.

The counter lever mechanism

Press down the counter lever

A sound of a “click”will appear when the counter swing arm is twisted.The counter is then skipped to another number.

-11-

Bottom Base and Jig Installation Notice: 8.1. Jig Installation Notice8.1.1 The fixing screw of the jig must not be too long. (Figure 16).8.1.2 The fixing screw of the jig must be more than 2 pieces so that the

positioning can be stable.8.1.3 Smaller parts or simple installation can be selected as the center hole of

the bottom base. Fixing method and dimensions of the simple jig isshown in the right picture below.

8.1.4 Keep the table and jig base clean while fixing. (Deckle edge and grit will cause the pitting ).

8.1.5 T-slot dimension T-slot size (Figure 17).

Figure 16 The Screw must not be too long Figure 17 T-slot Dimension T-slot Nut Dimension

8.1.6. The screw is better to fix on the working plate for stability (Figure 18).

Figure 18 Base Installation

M8 screw

Jig plate

Bottom base

Error: The screw is too long to touch the base.

T-nut

Error: bearing clearance

1. Base fixing screw M10*4pcs2. M10 spring washer *4pcs3. M10 flat washer *4pcs

Base

Jig plate

Jig fixing screw M8*2pcs

-12-

Maintenance:9.1. Maintenance9.1.1 Please do not bump and damage the base. When there is a jut, burr or rust,

polish the base with oil-stone.9.1.2 When it’s done, clean the table and jig with engine oil or anti-rust oil.9.1.3 Use a plastic bag to cover the table when not using.9.1.4 Lubricate the steel jacket, spindle in usual, collet and nut as shown

below.9.1.5 Clean and use plastic bags to cover the machine when not using for a long time.

Figure 19. Bottom Base Figure 20. Guide Rod and Spindle

Guide rodPour the engine oil to lubricate the steel jacket once a week.

Slide base

Lower down the guide rodPour oil once a week Wipe with the

anti-rust oil on aregular basis

Please keep the table cleanand do not collide in prevention to get burr.Wipe with the anti-rust oil.