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Surface Grinder

STP-618 Series

Saddle Type

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Feature

3 HP V3 grade spindle motor for powerful output to achieve precision work and better grinding capability.

Cartridge spindle w/4 preloaded class 7(p4) bearings and run-out of taper nose better than 0.000060" T.I.R provides quiet, vibration free operation for better work pieces accuracy.

Manually operated 0.000050" micro down feed and micro cross feed. (STD on STP-618CII, optional on all other models)

Vertical handwheel at the waist level. (STP Only)

The table traverses on linear ball bearings with hardened and ground guide ways to ensure a smooth and easy movement.

Double V cross ways are hand scraped and Turcite-B coated for greater flatness and high wear resistance.

All castings are tempered and stress relieved twice to assure stability of the machine structure and resist deflection under load.

Hardened & ground column ways with cast spindle slide is precision fit for no "hang-up" gravity down-feed.

Indexable table handwheel for ease of operation. (618M only)

Work table flatness shall be within 0.00012".

Grinding Cycles

Cll Grinding mode

Step cross

Step cross

Plunge

Plunge

Crisscross

Crisscross

CXll Grinding mode

Step cross

Step cross

Plunge

Plunge

Crisscross

Crisscross

Slice

Slice

Specification

Model STP-618M STP-1A618 STP-2A618 STP-618CII STP-618CXII
General Capacity
Table Size 6" x 18" (150 x 450mm) 6" x 18" (150 x 450mm) 6" x 18" (150 x 450mm) 6" x 18" (150 x 450mm) 6" x 18" (150 x 450mm)
Max. Grinding Length 19" (480mm) 19" (480mm) 19" (480mm) 19" (480mm) 19" (480mm)
Max. Grinding Width 6" (170mm) 6" (170mm) 6" (170mm) 6" (170mm) 6" (170mm)
Distance from Table Surface to Spindle Centerline 19.3" (490mm) 19.3" (490mm) 19.3" (490mm) 19.3" (490mm) 19.3" (490mm)
Standard Magnetic Chuck Size 6" x 18" (150 x 450mm) 6" x 18" (150 x 450mm) 6" x 18" (150 x 450mm) 6" x 18" (150 x 450mm) 6" x 18" (150 x 450mm)
Longitudinal Movement
Manual Travel 20.9" (530mm) 20.9" (530mm) 20.9" (530mm) 20.9" (530mm) 20.9" (530mm)
Hydraulic Travel - 20" (510mm) 20" (510mm) 20" (510mm) 20" (510mm)
Table Speed (infinitely variable) - 16-82 fpm (5-52m/min) 16-82 fpm (5-52m/min) 16-82 fpm (5-52m/min) 16-82 fpm (5-52m/min)
Cross Movement
Manual Travel 7" (180mm) 7" (180mm) 7" (180mm) 7" (180mm) 7" (180mm)
Rapid Travel, approx. - - 38ipm(960mm/min) 38ipm(960mm/min) 38ipm(960mm/min)
Automatic Traverse Travel - - 6-3/4"(170mm) 0.02-0.24"(0.4-6mm) 0.02-0.24"(0.4-6mm)
Automatic Traverse Increment - - 0.02-0.24"(0.4-6mm) 0.02-0.24"(0.4-6mm) 0.0001-0.002"(0.001-0.05mm)
Handwheel per Graduation 0.001" (0.02mm) 0.001" (0.02mm) 0.001" (0.02mm) 0.001" (0.02mm) -
Handwheel per Revolution 0.2" (5mm) 0.2" (5mm) 0.2" (5mm) 0.2" (5mm) -
Vertical Downfeed
Rapid Travel, approx. - - - 4ipm (100mm/min) 4ipm (100mm/min)
Automatic Traverse Increment - - - 0.0001-0.002" (0.001-0.05mm) 0.0001-0.002" (0.001-0.05mm)
Handwheel per Graduation 0.0001" (0.005mm) 0.000050"(0.0001mm)-Option 0.0001" (0.005mm) 0.000050"(0.0001mm)-Option 0.0001" (0.005mm) 0.000050"(0.0001mm)-Option 0.000050"(0.0001mm) micro downfeed 0.000050"(0.0001mm) micro downfeed
Handwheel per Revolution 0.050" (1mm) 0.050" (1mm) 0.050" (1mm) 0.050" (1mm) micro downfeed 0.050" (1mm) micro downfeed
Grinding Wheel
Wheel Size (OD x W x B) ø8" x 1/2" x ø1-1/4" (ø203 x 12.7 x ø31.75mm) ø8" x 1/2" x ø1-1/4" (ø203 x 12.7 x ø31.75mm) ø8" x 1/2" x ø1-1/4" (ø203 x 12.7 x ø31.75mm) ø8" x 1/2" x ø1-1/4" (ø203 x 12.7 x ø31.75mm) ø8" x 1/2" x ø1-1/4" (ø203 x 12.7 x ø31.75mm)
Speed (50Hz/60Hz) 2850rpm/3450rpm 2850rpm/3450rpm 2850rpm/3450rpm 2850rpm/3450rpm 2850rpm/3450rpm
Motor
Spindle Motor 3HP (2.3kw) 3HP (2.3kw) 3HP (2.3kw) 3HP (2.3kw) 3HP (2.3kw)
Crossfeed Motor - - 25w 25w 1/2HP (0.4kw)
Elevating Motor - - - 1/2HP (0.4kw) 1/2HP (0.4kw)
Hydraulic Motor - - 1HP (0.75kw) 1HP (0.75kw) 1HP (0.75kw)
Floor Space
Total Space Required 76" x 43" x 69" (1950 x 1100 x 1770mm) 76" x 43" x 69" (1950 x 1100 x 1770mm) 76" x 43" x 69" (1950 x 1100 x 1770mm) 76" x 43" x 69" (1950 x 1100 x 1770mm) 76" x 43" x 69" (1950 x 1100 x 1770mm)
Weight
Net, approx. 1588lbs (722kgs) 1588lbs (722kgs) 1775lbs (807kgs) 1775lbs (807kgs) 1775lbs (807kgs)
Gross, approx. 1808lbs (822kgs) 1808lbs (822kgs) 1995lbs (907kgs) 1995lbs (907kgs) 1995lbs (907kgs)
Other
Total Rated Power, approx. 3HP (2.3kw) 4HP (3kw) 4.1HP (3.1kw) 4.6HP (3.5kw) 5HP (3.8kw)
Packing Dimension (L x W x H) 58" x 44" x 76" (148 x 110 x 194cm) 58" x 44" x 76" (148 x 110 x 194cm) 58" x 44" x 76" (148 x 110 x 194cm) 61" x 49" x 76" (155 x 124 x 194cm) 61" x 49" x 76" (155 x 124 x 194cm)

Accessories

Standard Accessories
Diamond Dresser
Splash Guard (except 618M)
Wheel Extractor
8" x ½" x 1¼" wheel and wheel flange
Balancing Arbor
Machine Lamp
Dust Guard
0.000050" Micro downfeed (STP-618CII only)
Optional Accessories
MAGNETIC CHUCKS AND CONTROLS
Electromagnetic chuck
Auto. Demagnetizer
Permanent magnetic chuck
DIGITAL READOUT SYSTEMS
One axis (Elevating) digital readout
Two axis (Z & Y axis) digital readout
COOLANT SYSTEMS
Coolant system w/mag. sep.& paper filter (20L/min, 100L)
Combination coolant & dust collector (50L)
Dust collector
Splash guard
OTHER ACCESSORIES
Manual parallel dressing attachment
Balancing stand
Spare wheel 8" x ½" x 1¼"
Spare wheel flange
Micro down feed (0.000050")
Micro cross feed (0.000050")

PROMOTIONS

PROMOTIONS