Grizzly T25920 Owner'S Manual Download Page 34

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Model T25920/T25926 (Mfd. Since 08/14)

Symptom

Possible Cause

Corrective Action

Vibration noise while
machine is running; noise
changes when speed is
changed.

1. Belt cover loose.

1. Tighten the knobs that secure the belt cover; if nec-

essary install a soft, vibration dampening material
between the belt cover and the headstock casting.

Excessive vibration (with
workpiece installed).

1. Workpiece mounted incorrectly.

2. Headstock, tailstock, or tool rest not

securely clamped to lathe bed.

3. Workpiece warped, out of round, or

is flawed.

4. Spindle speed is set too fast for

mounted workpiece.

5. Lathe is resting on an uneven sur-

face.

6.  Motor mount bolts are loose.
7.  Belt is worn or damaged.
8.  Spindle bearings are worn.

1. Re-mount workpiece, making sure that centers are

embedded in true center of workpiece.

2. Check clamp levers and tighten if necessary.

3. Cut workpiece to correct, or use a different

workpiece.

4. Reduce the spindle speed.

5. Shim base or adjust feet on workbench to remove

any wobbles.

6. Tighten motor mount bolts.
7. Replace belt (

Page 33).

8. Replace spindle bearings.

Chisels grab or dig into
workpiece.

1. Tool rest set too low.
2. Tool rest set too far from workpiece.

3. Wrong chisel/tool being used.

4. Chisel/tool dull.

1. Set tool rest higher (

Page 20).

2. Move the tool rest closer to the workpiece

(

Page 20).

3. Use the correct chisel/tool; educate yourself by

reading books, trade magazines, or seeking help
from an experienced lathe operator.

4. Sharpen or replace the chisel/tool you are using.

Bad surface finish on
workpiece.

1. Wrong spindle speed.
2. Dull chisel or wrong chisel being

used for the operation.

1. Use trial-and-error to find a better spindle speed.
2. Sharpen chisel or try a different chisel.

Tailstock moves under
load.

1. Tailstock mounting bolt loose.
2. Bed surface is oily or greasy.

1. Tighten.
2. Clean bed surface to remove excess oil/grease.

Can't remove tapered tool
from tailstock barrel.

1. Tailstock barrel not retracted all the

way back into the tailstock.

2. Debris was not removed from taper

before inserting into barrel.

1. Turn the barrel handwheel until it forces taper out of

barrel.

Always make sure that taper surfaces are clean.

Wood Lathe Operation

Summary of Contents for T25920

Page 1: ...manufactured since 03 16 COPYRIGHT DECEMBER 2014 BY GRIZZLY INDUSTRIAL INC REVISED APRIL 2016 WK WARNING NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL INC AWWK17009 PRINTED IN CHINA T25920 T25926 V2 04 16 ...

Page 2: ...ng grinding tool integrity and the usage of personal protective equipment The manufacturer will not be held liable for injury or property damage from negligence improper training machine modifications or misuse Some dust created by power sanding sawing grinding drilling and other construction activities contains chemicals known to the State of California to cause cancer birth defects or other repr...

Page 3: ...ng Tailstock 19 Adjusting Tool Rest 20 Installing Removing Headstock Center 21 Installing Removing Tailstock Center 21 Removing Installing Faceplate 22 Selecting Turning Tools 23 Spindle Turning 24 Faceplate Turning 26 Sanding Finishing 27 SECTION 5 ACCESSORIES 28 SECTION 6 MAINTENANCE 30 Schedule 30 Cleaning Protecting 30 Lubrication 30 SECTION 7 SERVICE 31 Troubleshooting 31 Tensioning Replacing...

Page 4: ... help Before calling make sure you write down the Manufacture Date and Serial Number from the machine ID label see below This information is required for us to provide proper tech support and it helps us determine if updated documenta tion is available for your machine Manufacture Date Serial Number Manual Accuracy We stand behind our machines If you have ques tions or need help contact us with th...

Page 5: ... 81 4 x 143 4 x 101 4 Foot Print Width Depth 5 x 24 51 2 x 43 4 Shipping Dimensions Type Cardboard Weight 210 lbs Width side to side Depth front to back Height 37 x 27 x 45 Electrical Power Requirement 110V or 220V Single Phase 60 Hz Full Load Current Rating at 110V w o 5 Restrictor 18 8 Amp Full Load Current Rating at 110V w 5 Restrictor 15 8 Amp Full Load Current Rating at 220V w o 5 Restrictor ...

Page 6: ...Tool Rest Post Length 3 in 23 8 in Tool Rest Base Height 11 4 in 13 8 in Construction Headstock Cast Iron Bed Cast Iron Frame Cast Iron Base Cast Iron Tailstock Cast Iron Paint Urethane Other Country of Origin China Warranty 1 Year Serial Number Location ID Label ISO 9001 Factory Yes Assembly Time 10 Minutes Model Number T25920 T25926 Operation Information 12 in 93 4 in Swing Over Bed 12 in 93 4 i...

Page 7: ... Tailstock Identification A B To reduce your risk of serious injury read this entire manual BEFORE using machine Become familiar with names and locations of controls and features shown below to better understand instructions in this manual D C L K H G E I Tool Rest Lock Lever J Base Lock Lever K Belt Tension Lever L Lathe ON OFF Switch M Spindle Speed Dial N Headstock Handwheel O Digital Readout F...

Page 8: ...or releasing of workpiece Quill Lock Lever Locks quill in place to prevent loosening during operation of lathe Tailstock Lock Lever Unlocks tailstock to allow quick position adjustments Quill Handwheel Quill Lock Lever Tailstock Lock Lever Figure 4 Tool rest control levers Tool Rest Tool Rest Lock Lever Base Lock Lever Tool Rest Provides a stable resting position for turning tools Tool Rest Lock L...

Page 9: ...d proof DANGEROUS ENVIRONMENTS Do not use machinery in areas that are wet cluttered or have poor lighting Operating machinery in these areas greatly increases the risk of accidents and injury MENTAL ALERTNESS REQUIRED Full mental alertness is required for safe operation of machin ery Never operate under the influence of drugs or alcohol when tired or when distracted For Your Own Safety Read Instru...

Page 10: ...with moving parts or flying debris Make sure they are properly installed undamaged and working correctly BEFORE operating machine FORCING MACHINERY Do not force machine It will do the job safer and better at the rate for which it was designed NEVER STAND ON MACHINE Serious injury may occur if machine is tipped or if the cutting tool is unintentionally contacted STABLE MACHINE Unexpected movement d...

Page 11: ...stop on its own Never put hands or another object on workpiece to stop it SAFELY MEASURE WORKPIECE Only measure workpiece after it has stopped Trying to measure a spinning workpiece increases entanglement risk SANDING POLISHING To reduce entanglement risk remove tool rest before sanding Never completely wrap sandpaper around workpiece CHECK WORKPIECE INTEGRITY Verify each workpiece is free of knot...

Page 12: ...y if connected to an undersized circuit To reduce the risk of these hazards avoid over loading the machine during operation and make sure it is connected to a power supply circuit that meets the specified circuit requirements For your own safety and protection of property consult an electrician if you are unsure about wiring practices or electrical codes in your area Note Circuit requirements in t...

Page 13: ...n cord size gets longer and the gauge size gets smaller higher gauge numbers indicate smaller sizes Any extension cord used with this machine must be in good condition and contain a ground wire and matching plug receptacle Additionally it must meet the following size requirements Grounding Plug Requirements Figure 6 Typical 5 15 plug and receptacle Grounding Prong Neutral Hot 5 15 PLUG GROUNDED 5 ...

Page 14: ...inventory them If any non proprietary parts are missing e g a nut or a washer we will gladly replace them or for the sake of expediency replacements can be obtained at your local hardware store Box 1 Figure 7 Qty A Knockout Rod 1 B Hex Wrenches 3 6 8mm 1 Ea C Live Center 1 D Handwheel Handle 1 E Spur Center 1 F Rubber Feet M8 1 25 x 15 4 NOTICE If you cannot find an item on this list care fully ch...

Page 15: ... 5 10 minutes 3 Wipe off the surfaces If your cleaner degreas er is effective the rust preventative will wipe off easily If you have a plastic paint scraper scrape off as much as you can first then wipe off the rest with the rag 4 Repeat Steps 2 3 as necessary until clean then coat all unpainted surfaces with a quality metal protectant to prevent rust NOTICE Avoid chlorine based solvents such as a...

Page 16: ...nstalled Tailstock Handwheel Handwheel Handle Bench Mounting Figure 11 Direct Mount setup Machine Base Workbench Lag Screw Flat Washer Another option is a Direct Mount see example below where the machine is secured directly to the workbench with lag screws and washers The base of this machine has mounting holes that allow it to be fastened to a workbench or other mounting surface to prevent it fro...

Page 17: ... or unexpect ed results that can lead to serious injury death or machine property damage Serious injury or death can result from using this machine BEFORE understanding its controls and related safety information DO NOT operate or allow others to operate machine until the information is understood To test run machine 1 Clear all setup tools away from machine 2 Connect machine to power supply 3 Tur...

Page 18: ...e of this overview is to provide the nov ice machine operator with a basic understanding of how the machine is used during operation so the machine controls components discussed later in this manual are easier to understand Due to the generic nature of this overview it is not intended to be an instructional guide To learn more about specific operations read this entire manual and seek additional t...

Page 19: ... or break the turning tool which might then fly apart Always visually inspect your workpiece for these items If they can t be removed DO NOT turn the workpiece Large Loose Knots Loose knots can become dislodged during the turning operation Large knots can cause a workpiece to completely break in half dur ing turning and cause machine damage and personal injury Choose workpieces that do not have la...

Page 20: ...speed recommendations chart in Figure 16 to choose the appropriate RPM for your operation Then choose the speed range that will include the selected RPM Always choose correct spindle speed for your operation Using wrong speed may lead to workpiece breaking loose or being thrown from lathe at a high rate of speed causing fatal or severe impact injuries To change speeds 1 DISCONNECT MACHINE FROM POW...

Page 21: ...nting Nut 4 Locate desired speed on speed chart on top of control box then move belt to necessary grooves on motor and spindle pulleys see Figure 19 6 After verifying belt tension is correct re install rear cover and close side access cover Pulley Deflection Pulley Figure 20 Checking belt deflection 1 2 A B C High Range 1600 3800 RPM Mid Range 1250 2800 RPM Low Range 650 1450 RPM A B C Spindle Mot...

Page 22: ...ents to fine tune the clamping pressure as needed Figure 23 Typical tool rest controls to adjust position and height Tool Rest Lock Lever Tool Rest Base Lathe Bed Base Lock Lever Adjusting Angle or Height 1 Loosen the tool rest base lock lever and the tool rest lock lever to adjust the position of the tool rest 2 Position the tool rest approximately 1 4 away from the workpiece and approximately 1 ...

Page 23: ...ing spur center 4 Check that center is securely installed by giv ing it a quick tug A properly installed center will not pull out by hand Installing Headstock Center 1 DISCONNECT MACHINE FROM POWER 2 Make sure surface of center and spindle are free of debris and oily substances before inserting center 3 Insert tapered end of center into spindle and push it in quickly and firmly see Figure 25 Figur...

Page 24: ...face plate refer to Faceplate Turning on Page 26 Removing Faceplate 1 DISCONNECT MACHINE FROM POWER 2 Hold headstock handwheel securely while turning faceplate counterclockwise until it is removed If the spur center is installed it will be removed during this process Installing Faceplate 1 DISCONNECT MACHINE FROM POWER 2 Thread faceplate onto spindle shaft until secure against shoulder on spindle ...

Page 25: ...ls to aid in hollowing bowl making cutting profiles etc The Swan Neck Hollowing Tool shown on Page 29 is a good example of a specialty tool Selecting Turning Tools Lathe tools come in a variety of shapes and sizes and usually fall into five major categories Gouges Mainly used for rough cutting detail cutting and cove profiles Rough gouge is a hollow double ground tool with a round nose and detail ...

Page 26: ...r of workpiece on both ends 3 Using 1 4 drill bit drill 1 4 deep hole at center mark on end of workpiece to be mounted on headstock spur center 4 To help embed spur center into workpiece cut 1 8 deep saw kerfs in headstock end of workpiece along diagonal lines marked in Step 1 5 If your workpiece is over 2 x 2 cut corners off workpiece lengthwise to make turning safer and easier see Figure 35 6 Dr...

Page 27: ...ce Otherwise spin ning workpiece could force lathe tool out of your hands or entangle your hands with workpiece Failure to heed this warning could result in serious personal injury Do not press workpiece too firmly with tailstock or bearings will bind and over heat Do not adjust tailstock too loosely or workpiece will spin off lathe Use good judg ment and care otherwise serious personal injury cou...

Page 28: ...24 2 Center faceplate on workpiece and attach with wood screws that do not have tapered heads see Figure 38 3 Thread and secure faceplate onto head stock spindle refer to Removing Installing Faceplate on Page 22 for faceplate mount ing instructions If wood screws cannot be placed in the workpiece the faceplate can be mount ed to a backing block attached to the workpiece see Mounting Workpiece to B...

Page 29: ...Make backing block from a suitable size piece of scrap wood Note The faces of the backing block must be flat and parallel to each other or the uneven surfaces will cause the workpiece to spin eccentrically causing unnecessary vibration and runout It is best to mount the backing block to the faceplate and turn the other sur face flat prior to mounting 2 Locate and mark center of workpiece and backi...

Page 30: ...lting in serious personal injury or machine damage To reduce this risk only install accessories recommended for this machine by Grizzly NOTICE Refer to our website or latest catalog for additional recommended accessories order online at www grizzly com or call 1 800 523 4777 T27327 22 Bed Extension Need a longer lathe but don t want to dedicate the space to another machine then add this 22 bed ext...

Page 31: ...roblem of dig in Production turners can also load and unload their work while the lathe is still running Figure 45 Model H5954 MT 2 Stebcentre T10117 Big Mouth Dust Hood with Stand Capture dust from any machine operation with this Big Mouth Dust Hood Simply attach a 4 dust collection hose and adjust the hood right where you need it The free standing base eliminates complicated machine set ups and ...

Page 32: ...rom wood dust does not remain on bare metal surfaces Keep the bed rust free with regular applications of products like G96 Gun Treatment SLIPIT or Boeshield T 9 Cleaning Protecting To reduce risk of shock or accidental startup always disconnect machine from power before adjustments maintenance or service For optimum performance from your machine follow this maintenance schedule and refer to any sp...

Page 33: ...table 3 Feed rate cutting speed too fast for task 4 Belt slipping 5 Motor connection is wired incorrectly 6 Pulley slipping on shaft 7 Plug receptacle at fault 8 Motor has overheated 9 Potentiometer variable speed dial at fault 10 Motor brushes at fault 11 Pulley sprocket slipping on shaft 12 Motor is at fault 1 Use sharp lathe tools reduce feed rate depth of cut 2 Only cut wood ensure moisture is...

Page 34: ...wobbles 6 Tighten motor mount bolts 7 Replace belt Page 33 8 Replace spindle bearings Chisels grab or dig into workpiece 1 Tool rest set too low 2 Tool rest set too far from workpiece 3 Wrong chisel tool being used 4 Chisel tool dull 1 Set tool rest higher Page 20 2 Move the tool rest closer to the workpiece Page 20 3 Use the correct chisel tool educate yourself by reading books trade magazines or...

Page 35: ... tension lever down then tighten belt tension screw 4 Press belt with moderate pressure in center to check tension Belt is correctly tensioned when there is approximately 1 2 deflection when pushed as shown in Figure 51 If there is more than 1 2 deflection repeat the tensioning procedure until it is correct If tension cannot be achieved replace belt 1 2 Pulley Deflection Pulley Figure 51 Checking ...

Page 36: ...features an on board fuse designed to protect sensitive electrical parts from ther mal damage in the event of an overload If the machine does not start check the fuse To replace fuse 1 DISCONNECT MACHINE FROM POWER 2 Remove 4 Phillips head screws holding electrical box to side access cover see Figure 54 Figure 55 10A fuse location on circuit board 3 Carefully remove fuse then insert new fuse shown...

Page 37: ...d Qty Hex Wrench 6mm 1 Flat Head Screwdriver 2 1 T25920 T25926 Both models use same motor replacement brushes Part PT25920084 1 DISCONNECT MACHINE FROM POWER 2 Loosen belt tension screw raise motor to gain access to lower brush cap then tighten belt tension screw 3 Unscrew brush cap with flat head screwdriver see Figure 56 Replacing Lathe Motor Brushes 4 Carefully remove brush from motor see Figur...

Page 38: ...urrent at the time of printing but may not match your machine If you find this to be the case use the wiring diagram inside the motor junction box CAPACITORS INVERTERS Some capacitors and power inverters store an electrical charge for up to 10 minutes after being disconnected from the power source To reduce the risk of being shocked wait at least this long before working on capacitors EXPERIENCING...

Page 39: ...A1218 AC1 AC2 M M NTC 2 5D 20 Toggle Switch viewed from behind DRO XBS2012 6 11 Ground Spindle Control Circuit Board DZ 236A1 Potentiometer B103 Circuit Breaker RU L2 6A 50VDC RU CB 8 E19 4417 Transformer Figure 59 Connections in headstock Figure 60 Electrical box Figure 58 Digital readout display board T25920 T25926 Wiring Diagram ...

Page 40: ... 57 58 59 60 61 62 77 78 63 64 65 66 67 68 69 70 71 72 73 74 74 5 6 74 76 80 81 82 83 24 25 26 28 44 45 79 29 46 84 T25920 Breakdown SECTION 9 PARTS Please Note We do our best to stock replacement parts whenever possible but we cannot guarantee that all parts shown here are available for purchase Call 800 523 4777 or visit our online parts store at www grizzly com to check for availability ...

Page 41: ...22 TOOLREST CAM FOLLOWER 64 PT25920064 CIRCUIT BOARD 23 PT25920023 ADJUSTABLE HANDLE M8 1 25 X 20 65 PT25920065 PHLP HD SCR M4 7 X 6 24 PT25920024 HEX WRENCH 3MM 66 PT25920066 SWITCH BOX 25 PT25920025 HEX WRENCH 6MM 67 PT25920067 POTENTIOMETER B103 26 PT25920026 HEX WRENCH 8MM 68 PT25920068 TOGGLE SWITCH RU CB 8 E19 4417 27 PT25920027 LIVE CENTER MT 2 69 PT25920069 SET SCREW M6 1 X 12 28 PT2592002...

Page 42: ...chase Call 800 523 4777 or visit our online parts store at www grizzly com to check for availability 1 2 2 2 2 3 4 4 5 6 7 8 9 10 11 12 13 13 14 15 16 17 18 18 19 20 21 22 23 27 30 31 32 33 34 35 36 37 38 39 40 41 41 42 43 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 77 78 63 64 65 66 67 68 69 70 71 72 73 74 74 5 6 74 76 80 81 82 83 24 25 26 28 44 45 79 29 46 84 T25926 Breakdown ...

Page 43: ... PIN 20 PT25926020 TOOLREST 145MM 62 PT25926062 POWER CORD 18G 3W 72 5 15P 21 PT25926021 TOOLREST BASE 63 PT25926063 CIRCUIT BREAKER 4A GENERAL 22 PT25926022 TOOLREST CAM FOLLOWER 64 PT25926064 CIRCUIT BOARD 23 PT25926023 ADJUSTABLE HANDLE M8 1 25 X 20 65 PT25926065 PHLP HD SCR M4 7 X 6 24 PT25926024 HEX WRENCH 3MM 66 PT25926066 SWITCH BOX 25 PT25926025 HEX WRENCH 6MM 67 PT25926067 POTENTIOMETER B...

Page 44: ...e to machine during operation 65x143 5mm 17 x 19mm 22 5 x 56 5mm 26 x 228mm 120 x 72mm 38 x 71mm To reduce risk of death or serious injury read manual BEFORE using machine To get a new manual call 800 523 4777 or go to www grizzly com WARNING Always wear ANSI approved safety glasses and face shield when using this machine EYE FACE INJURY HAZARD WARNING ENTANGLEMENT HAZARD Tie back long hair roll u...

Page 45: ... metalworker ____ 0 2 Years ____ 2 8 Years ____ 8 20 Years ____20 Years 6 How many of your machines or tools are Grizzly ____ 0 2 ____ 3 5 ____ 6 9 ____10 7 Do you think your machine represents a good value _____Yes _____No 8 Would you recommend Grizzly Industrial to a friend _____Yes _____No 9 Would you allow us to use your name as a reference for Grizzly customers in your area Note We never use ...

Page 46: ...D LINE FOLD ALONG DOTTED LINE GRIZZLY INDUSTRIAL INC P O BOX 2069 BELLINGHAM WA 98227 2069 Place Stamp Here Name_______________________________ Street_______________________________ City______________State______Zip______ Send a Grizzly Catalog to a friend ...

Page 47: ... shall be tried in the State of Washington County of Whatcom We shall in no event be liable for death injuries to persons or property or for incidental contingent special or consequential damages arising from the use of our products To take advantage of this warranty contact us by mail or phone and give us all the details We will then issue you a Return Number which must be clearly posted on the o...

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