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RYOBI 12 in. DRILL PRESS W/LASER MODEL NO. DP121L REPAIR SHEET
RYOBI 12 in. DRILL PRESS MODEL NUMBER DP121L
The model number will be found on a plate attached to the motor housing. Always mention the model number in all correspondence regarding your DRILL PRESS or when ordering repair parts.
PARTS LIST FOR FIGURE A
KEY PART NO. NUMBER 3 TDP07001 * 5 13401002A 6 TDP03001 * * 8 13401003A 9 13201010A 12 TDP06001 * * 16 13401004B 19 16101013A 21 TDP12B03009 * 23 13103006M13103006M 27 13303001A 29 13303002A 31 TDPTDP089140200036 * * DESCRIPTION KEY PART QTY. NO. NUMBER 38 16104007A 41 TDP12BTDP06002 * * * * * * 65 TDP13302023A DESCRIPTION QTY.
BEVEL STOP..1. RPM LABEL..1 SCREW (M5 X 6 mm PAN HD.).9. BASE..1. COLUMN HOLDER.1 SET SCREW (M8 X 10 mm HEX SOC.)..3 BOLT (M10 X 30 mm HEX).4. TUBE COLUMN.1 RACK..1 COLUMN COLLAR.1 KNOB..1 HEX NUT (M8)..2. CRANK.1. SCREW (M6 X 8 mm HEX SOC.).3 GEAR SHAFT..1 TABLE SUPPORT.1. WORM GEAR..1 GEAR..1 TABLE LOCK HANDLE.2 TABLE..1 SCREW (M12 X 25 mm HEX HD.)..1. ARM-TABLE..1 CHUCK KEY.1 CHUCK..1 ARBOR..1. CHUCK TOOL (DRIFT).1. SPINDLE..1 BEARING (80204).1 QUILL TUBE.1 QUILL GASKET.1. BALL BEARING (60201)..1. RETAINING RING (11).1 SCREW (M3.5 X 9.5 mm PAN HD.).4. SWITCH.1 SCREW (M5 X 25 mm PAN HD.).2.
LIGHT SWITCH..2 SWITCH BOX.1. SPRING RETAINER.1. TORSION SPRING.1. CAP SPRING..1 HEX NUT (M12).2. KNOB..4 HANDLE CLAMP.1 FEED HANDLE.1. V BELT..1 HEX NUT (M10 mm).1. LOCK WASHER (20-1).1 SPEED ADJUST-HUB..1 SCREW (M5 X 12 mm PAN HD.).3. COLLAR SHAFT..1 KEY (M3 X 6 mm)..1. PINION SHAFT..1. SCREW (M6 X 5 mm HEX SOC.).2 SCREW (M4 X 16 mm PAN HD.).2. SENSOR..1 SCREW (M2.2 X 6.5 mm).4. SCREW (M5 X 8 mm HEX SOC.).2 SPINDLE PULLEY-LOWER.1 SPINDLE PULLEY-UPPER.1. C-CLIP (SPINDLE PULLEY)1 BEARING (61907).1 RETAINING RING (35)..1 DRIVE PLATE..1 RETAINING RING (24)..1 RETAINING RING (17)..1 BALL BEARING (60203)..2. SPACER.1 INSERT PULLEY.1 KEY (M4 X 60 mm).1. POWER CORD.1. HEX KEY (5 mm).1
* Standard Hardware Item May Be Purchased Locally
KEY PART NO. NUMBER TDP089140300049 * * 80 13202014A * * 89 TDP089140388 * * 108 089140200089
KEY PART QTY. NO. NUMBER * * * 115 TDP08001 119 TDP03002 * * 122 13406002A * 983000642 06-06-08 (REV:06)
HEX KEY (4 mm).1 HEX KEY (3 mm).1 PULLEY COVER.1 SCREW (SET W/DOG POINT M8 X 16 mm HEX SOC.).1 RACK..1 SCREW (M4 X 8 mm PAN HD.).4. SENSOR SEAT.1. RUBBER GROMMET.2 CORD CLAMP W/SLEEVE.2. GEMEL SEAT..2 MOTOR PULLEY-LOWER.1 MOTOR PULLEY-UPPER.1 RETAINING RING (14)..1 SCREW (M4.2 X 9.5 mm PAN HD.).4. GEMEL CLAMP.2 GEMEL.1. SCREW (M8 X 25 mm HEX SOC.)..4 LOCK WASHER (M8).4 WASHER (M8)..4 MOTOR PULLEY SPRING.1 HOOD SPRING..1 PALLET SPRING.1 KEY (M4 X 75 mm).1. MOTOR..1 ROLL PIN (D6 X 16 mm).1 HEAD STOCK..1 SCREW (M4.2 X 13 mm COUNTERSUNK HD.).2. GEAR SHAFT..1 SHAFT SEAT.1 RETAINING RING (16)..1 DEPTH STOP RING.1 ROD..3 KNOB DEPTH SCREW.1 HUB..1 ROLL PIN (D2.5 X 12 mm).1 BULB SOCKET W/NUT.1 BULB SOCKET-BRACKET.1.
SCREW (M4 X 12 mm PAN HD.).2. SCREW (M8 X 16 mm HEX SOC.)..1 WASHER (M8)..1 SPRING..1. LASER LIGHT..2 ROLL PIN (D2.5 X 16 mm).1 EXT. TOOTH LOCK WASHER (M5)..2 LED ASSEMBLY.1. BAFFLE..1 SPECIAL SET SCREW.1. HEX SCREW (M8 X 8 mm).1. SCALE LABEL (FOR BRACKET).1 SCREW (M5 X 8 mm PAN HD.).2. TABLE INDICATOR..1 DEPTH (STROKE) INDICATOR. 1. LASER WARNING LABEL-1.1 WARNING LABEL.1 DATA LABEL.1 SPEED ADJUST LABEL..1. LOGO LABEL..1 LAMP WATT LABEL..1 DEPTH SCALE LABEL.1 LASER WARING LABEL-2.1 SWITCH KEY..1 VISE (2.5 in.)..1. WASHER..3 LASER LABEL..1. HEX NUT (M10 mm).1. CAPACITOR (MOTOR) DP121L.1 CABLE CLAMP..1 INSULATING TAPE.1. WASHER..1 MOTOR CUSHION.1 OPERATORS MANUAL
* Standard Hardware Item May Be Purchased Locally
WHITE RED RED WHITE LED
WHITE GREEN BLACK
BLACK (SMOOTH) TO CENTER BLACK (RIDGE)TO EDGE
THREE DIFFERENT Drive systems deliver different levels of slippage under torque
Spindle sander pulley Idler pulley Spindle pulley Drive pulley Spindle pulley Drive pulley
Benchtop Drill Presses
Three-pulley systems (left) provide more speed selection and slipped less under torque than stepped two-pulley systems (center) in our tests. For continuous variable speed, Ryobis shiv pulleys (right) open and close as you change the speed setting. At top speed, as shown, the drive pulley closes down to run the belt near its outer perimeter, while the spindle pulley opens its widest. For the slowest speed, the drive pulley opens up and the spindle pulley closes down. The variable-speed presses in our test also exhibited little, if any, slippage under torque.
Benchtop drill presses do the job for less money
Despite their small size, benchtop models offer workpiece capacities pretty close to full-size presses. All eight machines we tested offer 1214" of swing (giving you 67" between the chuck center and column), compared with the 17" swing typical of a floor-model drill press. Seven feature at least a 3" stroke (the maximum depth you can plunge a bit). Stationary presses range from a 312" to 5" stroke. Here again, how often do you drill deeper than a 3" hole? Although a few have less, most of the tested presses have 12- to 34 -hp motors, equal to those on typical floor models. Most have ample power to bore holes larger than 212" without forcing the bit to stall, although two machines struggled in that test.
Dont let a small package betray the power inside
lever locks excel at tension
Tension lever lock
Powering a 212" Forstner bit into hard maple is a tough challenge for any drill press, but these smaller machines managed the task as well as floor models.
With nearly as much capacity and power as floor-standing units, these brutes get the job donefor half the price.
hinking about buying a floormodel drill press? Consider this: How often do you bore into the long axis of a workpiece (a lamp base, for example)? Nearly all drilling in
woodworking calls for the table to be situated within 4" of the chuck. That means a benchtop drill press not only can handle most of your drilling needs but it also costs about half as much as a
floor-standing model. Now, before you dismiss benchtop drills as toy models, read on to find out how manufacturers have narrowed the gap between them and their taller cousins.
WOOD magazine November 2007
We found lever-operated belt-tensioning systems, such as this one on the Rikon 30120, made speed changes easier.
Curious to see if these machines horsepower ratings converted to real drilling power, we force-fed each drill press a steady diet of hard maple and white oak under large bits and hole saws, trying to make the bits stall. Using a sharp 212" Forstner bit and a 234" hole saw, we drilled into 2"-thick stock, going easy at first, and then forcing it. Drill presses with three pulleys, such as the Shop Fox, shown above left, handled these tough tests best without the motor stalling or the belts slipping. The two variable-speed unitsthe Delta DP-350 and Ryobi DP121Lalso performed well, as their wide V-belts transferred power from the pulleys to the spindle without slipping. On the other hand, Craftmans 21914 and Deltas DP300L proved easier to stall with their narrow V-belts and smallish pulleys. For speed changes, you just cant beat the ease of the variable-speed controls on the Delta DP350 and Ryobi drill presses, shown at right. We like this feature because it encourages us to actually change speedscome on, weve all been guilty of not changing speeds for different sizes of bits, right?by making it so darned easy. With variable-speed presses, the drive and spindle pulleys open and close, as shown at top right, changing the chuck speed as you adjust the speedcontrol handle. We give extra kudos to Ryobi for including a digital display that shows the spindle speed. Variable-speed control eliminates the nuisance of moving belts to make speed changes, which can be difficult, especially on taller models like the Grizzly
G0485 and G7943 and the Rikon 30120. On multispeed units like these, we prefer the lever-style locks, shown at bottom left, on the Grizzly G7943 and Rikon 30-120, which make it easy to adjust motor tension. Spring-loaded rods on others proved more troublesome.
variable-speed control proves useful
Change speeds on the Ryobi (top) by swinging the lever; the digital readout shows the speed. Adjust Deltas DP350 (bottom) by turning the dial. With no markings, though, you have to guess the speed.
Left to right
Threaded-rod depth stops with two locking nuts proved the most reliable in our test. Deltas DP350 has a quickrelease nut for making large depth adjustments quickly. Dial stops, like this one on the Rikon, stop the quill-feed handle rotation to control drilling depth.
THREE STYLES OF depth stops vary in dependability
Expect your depth stops to be accurate, repeatable
Every drill press should have a sturdy, reliable stop for drilling multiple holes to the same depth. The Ryobi and Delta DP350 did not. These eight units feature two styles of depth stops (shown above): a threaded rod on the left side of the
100 holes prove whos best
Not so good
head or a dial stop on the handle shaft. To test the effectiveness of each units stop, we drilled 100 holes using a 38" Forstner bit, and then measured the depth of the first and last holes with a digital caliper, noting any variation. Threaded-rod stops with locking nuts performed flawlessly in our tests, with hole depths varying less than.005". The quick-release nut on Deltas DP350, however, rotated about a quarter-turn during the testing, resulting in a difference of.018" from the first hole to the last. We found mixed results with the dial stops, with hole depths on three machines changing from.003" to.008". However, Ryobis 100th hole was.062" (116") deeper than its first.
clamping to tables: good luck WITH THAT
attachment, fussing with adding and aligning a fence, and adjusting the depth stops, its hardly worth the effort. Instead, we believe its worth the money to invest in a benchtop mortiser. Come on, baby, light my work. Incandescent lights mounted inside the head behind the chuck produce a lot of light, but large bits create a shadow on the centerpoint you need to see. We prefer incandescent lights mounted on flexible necks (on both Delta models) so you can direct light exactly where you need it. Craftsmans flexible LED light proved too dim to offer much help. Its a handy sander, too. Shop Foxs W1668 converts to an oscillating spindle sander, shown at far right, with a simple belt change. Insert one of the three sanding drums into the chuck, and then swing the table so the drum can drop through the 214" hole. Switches do make a difference. You only need a power switch to turn a
handle offers good form
sanding option works great
Craftsmans horizontal handle proved effective and comfortable, even with large bits that require more force.
When using Shop Foxs drill press as an oscillating spindle sander, attach your shop vacuum hose to the 214" dust port.
machine on and off. But it matters most when you need it in an emergency. We like front-mounted paddle-style switches because theyre easiest to turn off,
especially if you cant take your eyes off your work. Shop Foxs side-mounted paddle switch proved more difficult to find quickly.
Gussets Grizzly G7943
Meet the benchtop drill team
The undersides of these three tables show how difficult it can be to find good clamping area, except on the Ryobi.
Dont look for the ideal drill-press table here
These three test samples show the depth difference between the 100th and first holes for the Ryobi (top), Delta DP350 (center), and Grizzly G0485 (bottom).
With all the improvements made to drill presses recently, manufacturers continue to overlook tables. All tested models have cast-iron tablesbetter suited for metalworkingwith rack-and-pinion
crank lifts. Large, deep gussets and extended rims underneath make it difficult to clamp workpieces to the tables. The best of the bunch is on the Ryobi with a 2"-wide perimeter underneath, as shown above. We could clamp a fence or jigs to this table easier than the others.
Other features to influence your buying decision
Spindle runout was a pesky, but not major problem. Runoutthe wobble of the spindle as it spinsvaried from.001" to.009" with the eight machines when measured with a precision steel rod locked in the chucks. (Industry standards vary, but several manufacturers say they demand.006" or less of spindle runout.) But when we drilled holes with each machine using a 2" Forstner bit, we found almost no difference in diameter, even on the machines with the greatest runout. We did find that the wobble in the worst machines made it slightly tougher to 64
place the point of a spinning bit precisely onto a crosshair. Lasers prove helpful. The Craftsman, Delta DP300L, and Ryobi have bright-red crosshair lasers to aid in aligning your drill bit. Once calibrated, they proved dead-on at marking the centerpoint of any bit. Ryobi gets praise for easy adjustment and for being wired to the machine. (The others are battery-operated.) Deltas laser mounts to the column just below the head, so it provides the best angle, especially for large bits that can block the others. Craftsmans laser location led us to accidentally knock it out of adjustment several times during testing.
Handle leverage proves critical for larger bits. A long handle provides more force than a short one on a drill press. The handles on two tested models (Rikon and Deltas DP300L) proved uncomfortably short. One of Craftsmans three handles, shown on the next page, top, produced good leverage and the most comfortable and ergonomic feel of any handle. Mortising with these presses requires great patience. Sure, you can use mortising attachments on most of these machines. (All but Ryobi offer them as accessories.) But between removing equipment (lasers, chuck guards, etc.) to make room for the
Craftsman 21914, $200
800-383-4814, craftsman.com We like the unique quill-feed handle and digital depth scale, but the drive belt on this light-duty machine slipped easily while drilling with large bits. With high spindle runout, we had difficulty placing bits onto a pinpoint crosshair. The LED worklight is a good idea, but too dim. You need to removeand later recalibratethe laser from the quill to install a mortising attachment.
Delta DP300L, $200
800-223-7278, deltaportercable.com Like the Craftsman, this machine is light-duty, with the belt slipping easily when using large bits and hole saws. Its handles are small and toyish, it has an inch less of quill stroke than the other models, and it has the smallest table. The DP300Ls laser proved accurate and helpful, and we liked the flexible worklight. Its dial depth stop performed well in testing.
Delta DP350, $240
800-223-7278, deltaportercable.com We love the versatility of this units variable speed, although the addition of speed markings on the scale would make this good drill press even better. The depth stops quick-release nut makes for fast adjustments but slipped more than we like in our 100-hole test. Large quillfeed handles provide good leverage, and the flexible incandescent worklight puts bright light where needed.
Most perform well; Heres what wed buy
Grizzly G0485, $190
800-523-4777, grizzly.com This no-frills drill press proved itself capable and accurate beyond our expectations, given its low price. It had the least amount of quill and spindle runout, and its depth stop produced 100 holes of identical depththe best in the test. With a bottom-end speed of 230 rpm and top speed of 3,270 rpm (16 total), the G0485 provides a wider speed range than most, for large and small bits. Its the only unit to include a clearplastic safety guard around the chuck.
Grizzly G7943, $225
800-523-4777, grizzly.com Capacity, capacity, capacity: The G7943s 14" swing, 34 -hp motor, and 58" chuck were all tops among the eight tested machines. It also has a generous table, and weighed the most at 140 pounds. With a test-best slow speed of 140 rpm, it has the low-end torque to handle large boring jobs with ease, and its threadedrod depth stop proved reliable. Our lone knock: With the most spindle runout in the test, we had difficulty placing bits onto a pinpoint crosshair.
Rikon 30-120, $250
877-884-5167, rikontools.com Rikons 42"-tall machine provides the largest vertical capacities in the test. But it also required a step-stool to change speeds. The 30-120s low-end 220 rpm proves a plus for large bits, and its 3,600 rpm top speed was highest among the eight machines. With the largest table center hole (118"), it also has replaceable inserts. The handles are short and awkward to use, though, and we bumped our hand regularly on the motor tensioning lever when lowering the quill.
Ryobi DP121L, $170
800-525-2579, ryobitools.com The DP121L sports big-machine features (variable speed, digital speed display, and a reliable laser crosshair that never needs batteries) at a benchtop drill-press price. It has the best table for clamping with an adjustable tilting scale, and the price includes a work-holding vise. Only one thing stood between the DP121L and our Top Tool award: Its depth stop slipped the most in our testing. If you dont do much multiple-hole drilling, though, get this machine.
Shop Fox W1668, $260
800-840-8420, shopfox.biz The W1668 is an average-performing drill press that doubles as an oscillating spindle sander and comes with three drums 12" in diameter. That may make it worth the premium price to you. It has a good speed range, and its depth stop proved reliable in our testing. The sanding relief hole and dust port make clamping workpieces to the right side of the table difficult. The left-side-mounted power switch is more difficult to reach than front-mounted ones.
There was no runaway choice for Top Tool because each machine had its quirks. Nevertheless, we feel confident in recommending both the Grizzly G0485 and Delta DP350 as Top Tools. The Grizzly is a solid, no-frills machine that delivers highly accurate resultsits depth stop never budged while drilling 100 holes. We like the Delta DP350 for its variable-speed control, surprisingly high torque, flexible work light, and large knobs on long handle shafts. Wed be willing to live with a little slippage of its depth stop to have the variable speed. The unreliable depth stop on the Ryobi DP121L kept it from contending for Top Tool. But if thats a non-issue for you, this is a powerful variable-speed drill press, nicely equipped, for $70 less than the DP350. So the DP121L earns our Top Value award.
Written by Bob Hunter with Jeff Hall
Benchtop Drill Presses under $300: More Than the Boring Facts
DIMENSIONS, INCHES DRIVE SYSTEM
ACCESSORIES (9) 1.Largest diameter workpiece you can drill to the center. (Double the distance from the chuck center to the column edge. 2. (VS) Variable speed 3. (D) Dial depth stop (Q) Threaded rod with quick-release nut (T) Threaded rod with locking nuts 4. (D) Dial stop with nut lock (L) Dial stop with lever lock (N) Threaded rod with nut lock (R) Threaded rod with lever lock 5. (B) Button (P) Paddle (T) Toggle 6. (IF) Incandescent bulb on flexible arm (IH) Incandescent bulb in head (LED) Light-emitting diode on flexible arm (N/A) No light included
A 7. Excellent B Good C Fair 8.Boring with 212" Forstner bit and 234" hole saw in hard maple and white oak. 9. (F) Fence (G) Chuck guard (K) Chuck key holder (L) Light (M) Mortising attachment (P) Switch padlock (S) Sanding drums (T) Tool tray (V) Drill vise 10.Prices current at time of article production and do not include shipping, where applicable.
CHUCK, SPINDLE, AND QUILL
HE S , IN C HE S
PERFORMANCE GRADES (7)
OP S T Y LE L-LO (3) CK S T Y LE ( 4) SIZ E , IN C HE S
T, DE G REE (5) S CKOU WO R T: YE K LI G S, NO HT (6 ) L A SE R: Y E S, NO O BS E RV ED P OW S PI N ER A D LE A ND T CCUR O RQU DEP T AC Y E (8) H-ST OP D E PE N E A SE DABI O F CH LI T Y AN G H AN IN G S D LE L PE E D E V ER S E A SE AGE OF A N G LE E A SE D DR I LLI N O F CL G A MP WO R IN G K-LIG TO TA HT E B LE M AN FFEC UAL TI V E C L AR NE S S IT Y
ES K TO TABL E
S PE E
IN C H
BA S E
, IN C
I M UM
R IG H
T H, F EE T NT Y, Y E AR S WAR RA
PACI T Y,
PR I N
T UR E
/M A X
O F SP
N C HE
GE , L
T Y LE
FO O T
C H LO
LE N G
. HE I
OV E R
O P TI
CRAFTSMAN DELTA DELTA GRIZZLY GRIZZLY RIKON RYOBI SHOP FOX
21914 DP300L DP350 G0485 G7943 30-120 DP121L W1668
VS 16 VS 12
500/3,000 620/3,100 500/3,100 230/3,270 140/3,050 220/3,600 500/3,000 250/3,050
D D Q T T D D T
D 1010 D 834834 R 912912 N 1112 dia. N 11381138 D 1178 dia. L 11 dia. N 1212 dia.
45/45 45/45 45/45 90/90 90/90 45/45 45/45 45/45
P T B P P T P P
MU-42PM11 Nokia 6265 VP-D455I Dvdr3440H-31 Transmitter DS7000 CA-200 KV-28LS35B DVX382K Series 3 72 SW ICC21-codestelecommande Memup Kazz GR-432SFA Assist Z109 SMP-U10 MD 5232 Leica M3 Lite 330 DI1811P 6280T SW AND Milk Speakers Datatraveler Chess 2 Deskjet 3650 DVP-NS315 Vectis S-1 Pocket PC Mark S807 MS-2347BS Transit C5000 HB175 SGH-A300 LS755 RSA1dtwp 32PW8717 1VF-65 NV100 F44010IM SF4000 CB 380 IP6210D Easy 110 35xx 45XX Vgn-fj270-B VP-D362 Island GA9020SF 3 Twin Manual Wheeler P SCD-XA333ES Acer S60 680 DUO Synkron 400 Benchtop Drill Press FT-1900R VCE-175 DTH6350E Drill Press DSC-W170 Parts Coolpix L21 Interpret S400 Alliance 310BVR Drill Press Review Hipath 1150 F-250 HR1364 60 Dymo 4000 RL33SB CT-S910 VP-D455 FC8601 Clipper 2 P Ekhbrd011AAY1 MO734DE GT-M7600 SB300 Silence M3A785gmh 128M D8892 LA46B650 Teac P-55 Deltax GPS Pilot XM-7547 SR-T101 Inforad K5 ES-HG90 Ixus 500 EXP221 00C Aspire 1700 EWF16780W NWZ-A847 PRO 88 Hitman-contracts C-V350 PX-716A 9600S
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