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has detected too great a depth of cut and/or too 
fast a feed rate.  

This change in conveyor speed may affect the 
finish surface. If the finish is affected, make 
another sanding pass without changing any 
settings. If the finish is still affected, make 
adjustments by slowing the conveyor and/or 
decreasing the depth of cut and run the stock 
through again. 

Also try a faster feed rate or less depth of cut if 
the stock you are working begins to show burn 
marks. With cherry, hard maple or other 
hardwoods, using a shallower depth of cut and a 
faster feed rate will help minimize burn marks. 
Slightly angling the stock as it is fed into the 
machine will also help prevent burning the stock. 

Because of the wide range of variables, it is 
important to experiment with your specific 
conditions and make adjustments to achieve the 
optimum feed rate. If problems occur, first check 
and adjust the feed rate, referring to the 

Troubleshooting

 sections in this manual. 

Tips for Maximum Performance 

The versatility designed into the 22-44 Pro-3 
drum sander allows it to be used for a wide 
variety of tasks that will boost the return on your 
investment. For example, its capabilities range 
from taking the place of a sander to thickness 
rough stock, to speeding up fine sanding work 
often done with slower, dust-generating hand 
sanders. 

Learning how to use its adjustments and 
controls will allow you to fine-tune the machine 
for maximum results. The best results come 
from experimenting with different abrasive grits 
and machine adjustments to fit the job at hand. 
Following is a list of useful tips which can help 
you improve performance of your sander. 

Dust Collection 

When connecting dust collectors, remember that 
straight pipe will not restrict airflow as much as 
flexible tubing. Y’s and elbows will restrict airflow 
less than T’s. Also, a hose smaller than 2-1/2” 
diameter should not be used. 

Multiple-Piece Sanding Runs 

When abrasive planing (or thickness sanding) a 
run of similar pieces that you want to have the 
same thickness, it is best to determine the 
thickness of the thinnest piece and process all 
pieces to that same thickness in one session. Be 
aware that the sander will remove cups and 
crowns in the workpiece; consider this when 
measuring and processing stock to the same 
thickness. 

Sanding Multiple Pieces At Once 

When sanding multiple pieces simultaneously, 
make sure to stagger (step) the pieces across 

the width of the conveyor belt. This provides 
better contact with the tension rollers. Try to 
process only multiple pieces of similar thickness. 
If there is a significant thickness difference, the 
thinner pieces can slip on the conveyor belt if 
they do not contact the tension rollers. Also note 
that pieces thicker than 3/4” should be longer 
than the minimum normally recommended to 
prevent tipping of the stock. 

Edge Sanding 

When edge sanding, the sander will mimic the 
opposite edge of the stock which is lying on the 
conveyor belt. Because of this, it is important for 
the stock edge to have been ripped at the proper 
angle to the face before the sanding process. 
When edge sanding stock that is less than 3/4” 
wide or more than 2” high, it is good procedure 
to stack and clamp several pieces together to 
prevent them from slipping or tipping on the 
conveyor belt. 

Sanding Imperfect Stock 

When sanding stock with a cup or crown, place 
the crown up. This will stabilize the stock to help 
prevent tipping or rocking during sanding. After 
the crown has been removed and the top is flat, 
turn the stock over and sand the opposite side. 
To avoid personal injury, take special care when 
sanding stock that is twisted, bowed, or 
otherwise varies in thickness from end to end. If 
possible, support such stock as it is being 
sanded to keep it from slipping or tipping. Use 
extra roller stands, help from another person, or 
hand pressure on the stock, to minimize 
potentially hazardous situations. 

Face Frames and Raised Panel Doors 

It is very important to have the proper abrasive 
contact when doing this type of sanding. If the 
machine is set to take an excessive depth of cut, 
the result can be a gouge or dip as the drum 
goes from sanding the rails at full width to 
sanding just a few inches of width on the stiles. 
To prevent this, make sure that when using 
abrasives finer than 80 grit the drum is in contact 
with the wood but can still be spun by hand. If 
there is room, angling the stock on the conveyor 
belt can also help. Slowing the conveyor feed 
when coming to a rail in the stock can help 
prevent a dip or gouge. This allows the abrasive 
to work the wider width with less effort, and to 
achieve better consistency of the finished 
surface. 

Stock Feeding Angle 

Some pieces, because of their dimensions, will 
need to be fed into the machine at a 90° angle 
(perpendicular to the drum). However, even a 
slight offset angle of the stock will provide for 
more effective stock removal. The optimum 
feeding angle for stock removal is about 60° 
(see Figure 37).  

Summary of Contents for 22-44 Pro-3

Page 1: ...arts Manual Drum Sander Model 22 44 Pro 3 JET 427 New Sanford Road Part No M 649600 LaVergne Tennessee 37086 Revision B 03 2016 Ph 800 274 6848 ECR 16020409184 www jettools com Copyright 2014 JET This...

Page 2: ...nal action needed JET has Authorized Service Centers located throughout the United States For the name of an Authorized Service Center in your area call 1 800 274 6846 or use the Service Center Locato...

Page 3: ...e Tuning Drum Alignment 19 Conveyor Belt Tension and Tracking 19 Trackers 20 Conveyor Belt Replacement 20 Tension Roller Adjustment 20 Adjusting Table Supports 21 Replacing V Belt 21 Rotating Drum Bea...

Page 4: ...approved safety equipment such as face or dust masks that are specifically designed to filter out microscopic particles 10 Do not operate this machine while tired or under the influence of drugs alcoh...

Page 5: ...veyor The part will be forced down as it begins to feed causing a pinching action between the part and the conveyor bed Never reach into a running machine Turn off sander and disconnect from power bef...

Page 6: ...4 2 passes Minimum Sanding Length in 2 1 4 Maximum Sanding Thickness in 4 Minimum Sanding Thickness in 1 32 Drum Speed RPM 1600 Conveyor Feed Rate SFPM variable 0 to 10 Dust Exhaust Dust Port Outside...

Page 7: ...the 22 44 Pro 3 Sander These are referenced throughout the manual and will help to familiarize you with the operation and functions of the machine Features Read and understand the entire contents of...

Page 8: ...x1 B 02 Hex Cap Screw 5 16 x3 4 C 08 Carriage Bolt 1 4 x3 4 D 16 Flanged Lock Nuts 3 8 E 04 Hex Nut 1 2 F 04 Flat Washer 1 2 G 16 Flat Washer 3 8 H 08 Hex Nut 1 4 J 08 Flat Washer 1 4 K 02 Square Nut...

Page 9: ...e the legs R remain in contact with the plywood Z2 4 Lift the sander and remove the assembly fixtures Z1 Z2 Referring to Figure 2 5 With the sander raised install casters W to legs R First lock the ca...

Page 10: ...ust be tensioned properly before operating the sander See Conveyor Belt Tension and Tracking on page 19 Infeed and Outfeed Table Installation Referring to Figure 7 1 Remove the lower hex cap screw C a...

Page 11: ...our sander 1 Place the unit where it will be used in the shop 2 Mark the position of the legs on the floor with tape so the sander can be returned to the same position 3 Place washers on the casters a...

Page 12: ...utboard slot width its end must be trimmed back three inches as shown 2 Squeeze the fastener lever Figure 10 on the outboard end of drum and insert the tapered end of the abrasive so that it uses most...

Page 13: ...at it does not bottom out against the inside of the drum IMPORTANT Leave a gap at least 1 8 between the tapered strip and the closed end of the slot Figure 14 to allow strip to be pulled into the fast...

Page 14: ...ee prong grounding plugs and three pole receptacles that accept the tool s plug Repair or replace a damaged or worn cord immediately As received from the factory your drum sander is wired for 230 volt...

Page 15: ...djusting screws and transfer rod see Features on page 7 Also apply grease to the miter gears 3 If the height adjustment still feels stiff Check for misalignment of adjusting screw supports and table s...

Page 16: ...t consideration of the board s thickness Relative measurement Figure 19 identifies the parts of the digital scale The button functions are discussed below followed by a section giving practical exampl...

Page 17: ...critical setting for reference for the purpose of later resetting to that same setting For example In the event that sanding a board is aborted in the middle of the operation 1 Press the HOLD button...

Page 18: ...rd Figure 21 shows one of the screws Slide motor support up the column and re tighten pinch bolt 3 Because the tension roller suspension assembly Figure 22 mounts to the drum bearing bolts which are u...

Page 19: ...test again until ridge is eliminated Conveyor Belt Tension and Tracking Tension and tracking adjustments may occasionally be necessary during break in and normal operation to compensate for belt stret...

Page 20: ...make sure they are parallel to the surface of the conveyor bed To do this first center the conveyor belt on the bed Then lay a straight edge on the exposed edge of the conveyor bed on the left outboar...

Page 21: ...t that connects it to the table mounting brackets adjust and tighten the set screws Figure 3 to hold the table support in position Then tighten the hex head bolts and re loosen the set screws Re align...

Page 22: ...ealing or are loose they may need replacing 1 Unplug sander from power source and remove dust cover 2 Raise conveyor table until the sanding drum rests on the conveyor 3 Outboard Remove the two knobs...

Page 23: ...s in the bearing collar 11 Install the driven pulley shown in Figure 35 making sure it aligns with the drive pulley on the motor Tighten the set screw 12 Install the outer half of the belt guard cover...

Page 24: ...he stock Drum should still rotate by hand Without changing drum height finish feeding the stock under the sander Start sanding drum and sand the stock at that same position Do not start drum while in...

Page 25: ...e to stagger step the pieces across the width of the conveyor belt This provides better contact with the tension rollers Try to process only multiple pieces of similar thickness If there is a signific...

Page 26: ...ely affect performance through the loading of the abrasives slippage on the conveyor table and or the accumulation of material inside the drums which can throw off the center of balance Leave the dust...

Page 27: ...the bottom slot of the Tracker Note When installed properly only the bottom lip of the Tracker will be visible The top slot is to be used if the bottom slot wears out 8 Install second Tracker opposite...

Page 28: ...eave a glossy surface which will not accept stains evenly This will vary by type of wood Oak for example is susceptible to burnishing because of its open pores Cleaning Abrasive Strips Regularly clean...

Page 29: ...otor not properly aligned Loosen housing bolts run motor re tighten bolts Transfer rod collar is worn Replace transfer rod collar Drive roller bent Replace drive roller Drum motor or conveyor motor st...

Page 30: ...Roller bushings elongated due to excessive wear Replace bushings Abrasive strip is loose Strip caught on inside edge of slot or on inboard side of drum Re adjust the strip end in the slot and or trim...

Page 31: ...rs set too low Re set tension rollers see page 21 Stock not supported properly during infeed or outfeed Support stock with roller stand tables or benches Conveyor drive roller or driven roller higher...

Page 32: ...eady To CutTM Abrasive Strip 60 Grit 60 9080 Premium Ready To CutTM Abrasive Strip 80 Grit 60 9100 Premium Ready To CutTM Abrasive Strip 100 Grit 60 9120 Premium Ready To CutTM Abrasive Strip 120 Grit...

Page 33: ...2R 40 0328 Mounting Bracket RH 2 3 TS 0081031 Hex Cap Screw 5 16 18x3 4 4 4 12 0152 Square Nut 5 16 18 4 7 TS 0060051 Hex Cap Screw 3 8 16x1 4 8 11 9103 Hardened Flat Washer 3 8 4 9 12 0209 Flanged L...

Page 34: ...Rail 2 25 30 3250 Lead Screw RH 1 26 20 1101 Miter Gear 4 27 50 3107 Oilite Bushing I D 1 2 4 28 30 3044 Inboard Column Tube 1 30 20 1103 Shaft Collar I D 1 2 2 31 30 3033 01 Transfer Rod 1 32 30 303...

Page 35: ...35 Stand Assembly...

Page 36: ...TS 0680031 Flat Washer 5 16 2 27 TS 0561021 Hex Nut 5 16 18 2 28 30 3051 02 Tension Roller 2 29 TS 0051061 Hex Cap Screw 5 16 18x1 1 4 2 30 11 0505 Internal Tooth Lock Washer 5 16 2 31 40 0015 Drum Ad...

Page 37: ...37 Drum Head Assembly...

Page 38: ...ck Washer 1 4 2 27 40 0003 Take Up Slide Bracket 2 28 30 3010 02 Driven Roller 1 29 20 1161 Wave Washer 1 4 4 30 72 2250 03 Washer 5 16 1 31 40 0002 Conveyor Bed 1 32 2244PRO3 432 Motor TEFC 3HP 230V...

Page 39: ...735141 Spacer 1 52 72 2250 02 Speed Adjustment Label 1 53 40 4018 Wiring Guard 1 54 TS 0560081 Hex Nut 10 32 2 55 TS 073203 Internal Tooth Lock Washer 10 2 56 TS 081D032 Phillips Pan Head Machine Scre...

Page 40: ...40 Electrical Schematic 2 T1 2 T1 BLACK 97 95 WHITE 96 98 GREEN 4 T2 6 T3 A2 4 T2 6 T3 14 NO 18 17 GROUND BLACK 1 L2 A1 WHITE 3 L2 5 L3 13 NO GREEN BLACK WHITE GREEN...

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