84 ENGINEERING Shop Mate 48 User manual

© 84 Engineering 2021
Rev 1
Assembly and Operating Instructions
Shop Mate 48
48 inch Belt Grinder
84 Engineering Pty Ltd
www.84engineering.com.au
Made in Australia

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WARNING:
This manual provides manufactures information on
the assembly, set up and operation of this equipment. Failure to
understand the contents of this document may result in
serious harm or injury.
The owner/operator of this equipment is responsible for the safe
assembly and operation of the equipment. 84 Engineering is
not liable for any injury or damage as a result of operator
negligence, misuse of the machine, failure to utilise approved
accessories or spare parts or unauthorised modifications to the
machine.
If there are any questions or comments. Please contact your 84
Engineering equipment provider.
WARNING:
All dust created as a result of grinding on this
machine should be considered harmful to human health at all
levels of exposure.
Appropriate respiratory masks should be used whenever the
machine is being operated.
WARNING:
Packing materials may present a choking or
suffocation hazard to children or pets. Dispose of all packing
materials in an environmentally responsible manner.

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Table of Contents
1. Safety instructions ................................................................................................. 4
1.1. General Machinery ...................................................................................... 4
1.2. Grinders ...................................................................................................... 4
1.3. Dust Extraction Systems ............................................................................. 5
2. Technical Data ........................................................................................................ 6
3. Assembly ................................................................................................................ 7
3.1. Component assembly ................................................................................. 7
3.2. Component assembly ................................................................................. 7
3.3. Securing the Grinder ................................................................................. 10
3.4. Variable frequency drive (VFD) and power switch mounting ..................... 10
4. Accessories and Spares ...................................................................................... 11
4.1. Accessories............................................................................................... 11
4.2. Spare parts ............................................................................................... 11
5. Operation .............................................................................................................. 11
5.1. Belt fitting and start up .............................................................................. 11
5.2. Small wheel attachment and arm .............................................................. 12
5.3. Cleaning and maintenance ........................................................................ 13
5.4. Bench and Pedestal Mount ....................................................................... 13
6. Trouble Shooting .................................................................................................. 14

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1. Safety instructions
1.1. General Machinery
 Read and understand the entire manual before assembling or operating machinery.
 Always use correct safety equipment including hearing protection, eye protection and
respiratory protection.
 Wear suitable clothing. Remove loose clothing, remove jewellery such as rings and necklaces
and keep loose hair tied back or contained.
 Keep machinery and work area clean and tidy and free of trip hazards.
 Do not use machinery when tired or under the influence of prescription drugs, non-prescription
drugs or alcohol.
 All machinery operators must be properly trained in the operation of the equipment and suitably
supervised.
 Do not reach over an operating machine and ensure footing is secure.
 Check machine for damaged components and maintain as necessary.
 Only use original manufactures accessories and spare parts.
 Do not force the machine or exceed its capacity.
 Do not leave the machine running when unattended and ensure the machine has come to a
stop before walking away following machine operation.
 Ensure machine is securely mounted or where mobile bases are utilised ensure wheels are
locked prior to operating the machine.
 Keep children and visitors away from operating machines and consider childproofing the
workshop area.
 Do not use machine in wet or damp areas or in areas that may have flammable or noxious
fumes.
 Ensure there is sufficient lighting around the machine and on the machine workface.
 If the machine is powered using an extension cord ensure that the extension cord is the correct
amperage and the cord is correctly sized for the length of extension cordage. Ensure cord is
installed in a manner that ensures it cannot be damaged. Inspect cord prior to starting the
machine.
 Disconnect power before servicing the machine.
1.2. Grinders
 Make sure that the grinder is turned off and has come to a complete rest before moving the belt
tension adjuster, loosen or adjust support arms or tool rest or carrying out cleaning or inspection
of the belt grinder.
 Never start or operate a grinder that is damaged or excessively worn.
 Ensure all lock levers are sufficiently tightened prior to operating the grinder.
 Do not operate the grinder with damaged or torn belts or damaged or torn abrasives on disc
grinders.
 Ensure belts that are marked with a direction of travel on the reverse side are correctly
orientated on the belt grinder.

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 Ensure the direction of travel for the belt is commensurate with the task being performed.
 All dusts should be considered harmful to human health. Suitable respirators should be worn
whenever using the belt grinder. Some dusts may cause allergic reactions to skin and surface
membranes.
 Do not wear gloves while operating grinders.
 Do not turn on grinders with the workpiece in contact with the abrasive grinding surface.
 When operating disc grinders, only grind on the portion of the disc rotating in a downwards
direction.
 Never leave the grinder running whilst unattended.
 The grinder is a hand hazard. Keep fingers and hands clear of moving parts and moving
abrasive surfaces.
1.3. Dust Extraction Systems
WARNING
:
Dust extraction systems may present a fire hazard when grinding metallic materials due to
potential build-up of hot/inflammable grinding debris.

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2. Technical Data
Table 1 – Technical Data
Specification Shop Mate 48
Shop Mate 48
Belt Length 1220 x 50mm (2 x 48”)
Weight (Excl motor) Approx. 13 kgs
Max Belt Speed 4500 surface feet per
minute belt speed
Platen Size 150mm platen backing
4 way rotating platen Yes
Slack belt operation Yes
2 and 3 inch contact wheels Yes
Belt Tracking Flat plane belt tracking
Grinder Frame Fully Welded Frame
Arm Slots 3
Work Rest Fixed work rest
Spark Guard Yes
Variable Speed Motor 1.5 hp
Deluxe Shop Mate
48
Variable Speed Drive 1.5 hp
Universal Tool Rest Yes
Small Wheel Attachment Yes, complete with 19mm
and 25mm wheels
Grinder Mount Bench mount or pedestal
stand
Vertical or Horizontal operation Yes

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3. Assembly
3.1. Component assembly
Your Shop Mate comes fully assembled other than the fitting of the top of the gas strut (No. 6)
to the tension arm (No. 17). This is done by screwing in the mounting bolt and securing with a
12mm spanner.
3.2. Component assembly
Figures 1 to 5 below show the detail assembly of the Shop Mate 48. A full parts list for the Shop Mate
48 grinder is shown in Table 2 below.
NOTE:
The parts list covers the base grinder components only.
Figure 1 – 48” Grinder Body Assembly (refer Table 2 for parts list)
Refer Figure 2

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Figure 2 – 48” Tension Arm Assembly (refer Table 2 for parts list)
Figure 3– 48” Platen Assembly (refer Table 2 for parts list)

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Figure 4 – 48” Platen Stop Collar Detail
Figure 5 – 48” Final Assembly

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Parts List
Table 2 – Main Assembly and Belt Tracker
Item Qty Part Name Bolt Torque Required
1
1
1.5HP/1.1KW 2 pole motor
2 1 SM-48-FRAME
3 1 SM-48 drive wheel
4
1
SM
-
48 Rest
5 1 SM-48 Platen arm
6
1
SM Gas strut
10NM
7
1
M10x30 Adjustable handle
8 2 M8x20 Adjustable handle
9
2
SM
-
48 Tension arm spacer
10 1 M10x50 SHCS
11
1
M10 Nylock nut
10NM
12
1
M6x40 SHCS
10NM
13 8 M6x16 SHCS 10NM
14
5
M6 Washer
15
1
M10 Washer
16 2 M8 Nut 10NM
17
1
SM
-
48 Tension arm
18 1 SM Spark Guard
19
1
Tracking wheel
20
1
Tracking mechanism
21 1 M8 Star grip
22
2
M6x20 SHCS
10NM
23 1 M12x75 SHCS 40NM
24 1 M12 Washer
PLATEN
25 1 SM-48 Platen support
26
1
2” Idler wheel
27
1
3” Idler wheel
28 1 SM-48 Platen
29
2
Platen brackets
30 1 M10 Spigot
31
1
Stop collar
32
1
M5x5 Grub screw
4NM
33 2 M10x50 SHCS 35NM
34
1
M10x25 SHCS
60NM
3.3. Securing the Grinder
The grinder or grinder stand (if used) must be securely fixed to a work bench or surface that is of
adequate strength and stability.
3.4. Variable frequency drive (VFD) and power switch mounting
Operation and maintenance details for the VFD are contained in a separate manual provided with the
VFD.
The VFD is supplied pre-programmed to maximise performance with the Shop Mate 48. Do Not alter
or modify the VFD program.
C
AUTION:
The VFD or power switches should be mounted in locations that do not require the
operator to lean over or across the grinder to operate the VFD or power switch.

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4. Accessories and Spares
WARNING:
Only genuine 84 Engineering supplied accessories, optional equipment or replacement
spare parts should be utilised on the Shop Mate 48 grinder.
4.1. Accessories
Refer to your local 84 Engineering equipment supplier for full list of options and availability. Key
accessories are shown below.
Table 2 Accessories List
Radius platen (36”, 48” and 72” diameter)
Small wheel attachments complete with 12.7mm and 6mm wheels or 19mm and 25mm
wheels
Large contact wheels (5”, 8”, 10”)
Bench mount tilting pedestal for use with Shop Mate 48
Height adjustable tilting pedestal stand for use with Shop Mate 48
Angle adjustable rest
Strap on surface grinder attachment
Universal tool rest
4.2. Spare parts
Refer to your local 84 Engineering equipment supplier for full details of available spares.
5. Operation
5.1. Belt fitting and start up
 Loosen and move the tool rest to allow sufficient clearance to fit the belt.
 Prior to fitting belts, ensure the belt is in good condition, the belt join is secure and there are no
rips or tears.
 Ensure if belts are marked on the back as unidirectional that belts are running in the correct
direction.
 Move and hold the tension arm to the full down position.
 The platen location should be such that when the belt tension arm is raised, it is at
approximately 80-90% of the full travel of the tension arm when the arm is raised without a belt.
 Move the tool rest to ensure a 1 - 2mm clearance between belt and the tool rest and fully rotate
the belt by hand to ensure the belt is free to move and there are no obstructions prior to starting
the grinder.
 Ensure all locking levers for the tool rest and platen arm are securely tightened prior to starting
the grinder.

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 Roll the belt over by hand to ensure the tracking is close to correct.
 Start the grinder and adjust tracking mechanism as required.
WARNING:
Do not replace or adjust the tool rest or platen arm while the grinder is in operation.
5.2. Small wheel attachment and arm
The small wheel attachment assemblies connect directly to the standard platen arm in lieu of platen.
Figure 6 – Small Wheel Attachment Connection
Figure 7 shows the different assembly connection detail for the 6mm/12.7mm attachment versus the
20mm/25mm attachment.
Figure 7 – Small Wheel Attachment Connection
6mm and 12mm small wheel attachment
arrangement
20mm and 25mm small wheel attachment
arrangement

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WARNING:
When operating the grinder using the small wheel attachment, the grinder speed must
not exceed 25% of the maximum VFD speed setting or the small wheels will be damaged
by excessive heat build and may fail. The 6mm/12mm small wheel attachment cannot
be operated with the fixed speed Shop Mate.
5.3. Cleaning and maintenance
 The grinder should be kept free of excessive dust build up.
 Regularly check bolts for condition and tightness.
 Regularly check wheels for excessive surface or bearing wear and replace as necessary.
WARNING:
Never used compressed air to clean the grinder or components. Compressed air may
drive dust into bearings and fittings leading to damage and premature failure.
5.4. Bench and Pedestal Mount
 The bench mount pedestal allows the grinder to be mounted above the level of the bench by
approximately 200mm.
 The height adjustable pedestal mount allows the grinder to be free standing. The height
adjustment allows the grinder height to be adjusted so that the universal tool rest can be moved
from a height of approximately 750mm to 1050mm above floor level.
 The bench mount pedestal allows the Shop Mate 48 to be rotated 90degrees from a vertical to
a horizontal operating position.
 The height adjustable pedestal mount allows Shop Mate 48 grinder to be rotated 90 degrees
from a vertical to a horizontal operating position.
 The bench mount pedestal or the height adjustable pedestal mount must be securely fixed to a
workbench or floor prior to mounting the grinder on the pedestal.
HELPFUL HINT:
 If the floor is not suitable for fixing directly onto the floor, the stand may be fixed to a
board large enough so that you can stand on the board whilst grinding to ensure
stability. We recommend a minimum board thickness of 18mm.
WARNING:
The grinder must be stopped and stationary before the grinder is flipped from the vertical
to horizontal position or the horizontal to vertical position.
C
AUTION:
The pedestal locking handle must be tightened before operating the grinder in the vertical
or horizontal operating position.

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6. Trouble Shooting
Table 4
Issue Possible Cause Action
Grinder will not start No power supply Check power supply at local outlet and
main board
Damaged power cord Check power cord and replace as
necessary
Motor or VFD failure. Have equipment checked by a qualified
electrician
Grinder not operating at full
speed
Check VFD speed setting Adjust as necessary
Excessive length or incorrect
current carrying capacity of
extension cords.
Reduce length or upgrade extension
cord.
Poor belt tracking Incorrect adjustment of
tracking mechanism
Adjust as necessary
Worn or damaged belt Replace belt
Incorrect location of grinding
wheels or platen in relation
to support arm
Adjust wheels and platen location as
necessary
Worn grinder wheels or
damaged wheel bearings
Check and replace as necessary
Slack Belt/Belt slipping Belt tensioner fully raised Adjust platen support arm to correct
location
Worn grinder gas strut Replace strut
Excessive grinding pressure Reduce grinding pressure
Excessive wheel wear Incorrect wheel alignment Check wheel alignment
Debris on wheel surfaces Clean and adjust as necessary
Excessive vibration Damaged or worn belt Inspect and replace belt
Damage or worn drive,
tricking or idler wheels
Inspect and replace wheels
Loose or unstable mounting
of the pedestal mount.
Check and secure pedestal mount
Unstable work bench (bench
mounted grinder)
Check and secure workbench.
Operation damaging belts Belts running in the incorrect
direction
Adjust belts to run in the direction
marked on the back of the belt.
Insufficient space between
the belt and tool rest
Adjust the position of the tool rest
Ground surface not square Tool rest not square to
platen
Adjust platen and/or tool rest angle