1) GRANITE SURFACE PLATE

Size mm
Thickness mm
Flatness Tolernce in microns
DIN 876
IS 7327 - 2003
00
0
1
0
1
2
3
400X400
70
3
6
14
4.5
9
17
34
630X400
80
3
7
16
5
10
21
42
630X630
80
3
7
16
5
10
21
42
1000X630
150
4
8
20
6
12
24
49
1200X800
150
4
8
20
7
14
28
56
1000X1000
150
4
8
20
7
14
28
56
1600X1000
200
5
10
26
8
16
33
66
2000X1000
200
6
12
30
9.5
19
38
75
2000X1500
200
8
14
34
12
22
42
80

 

Alfa Granite Surface plates are provided with a certificate of accuracy traceable to National Standards.
Smooth bearing points protects of both surfaces and tools used on it.
High modulus of rigity.
Industry's finest foundation for precise measurements.

ACCESSORIES
Steel Fabricated Stand with adjustable levelling screws
Rexine cover
Steel T-Slot as per customer requirements.

Granite Surface Plate

   
  2) CAST IRON SURFACE TABLE  
 
Used as a precision reference datum for inspection, tool making, gauging, spotting, marking, and layout.
Surface plates are made as per IS: 2285-1991 in two grades of accuracies and have handscraped finish.

Size in mm
Flatness tolerance in microns
Grade 1
                400x400
9
                630x400
10
                630x630
10
                1000x630
12
                1200x900
14
                1000x1000
14
                1600x1000
14
                2000x1000
16
                2500x1000
22











Cast Iron Surface Table





 
  3) GRANITE SURFACE PLATE WITH CONCENTRICITY CHECKING CENTRE
 

Granite surface plate with metal inserts and T-Slot can be used as a surface Table and a concentricity checking attachment.

Base Size mm
Admit B/W Centres mm
Centre height mm
1000x630x150
600
1000x1000x150
600
125, 160, 200
1600x1000x200
1200


Granite Surface plate With concentricity Checking Centre
 
  4)  PRECISION INSPECTION BENCH CENTRE
 

Used for inspecting work between centres for checking concentricity, true running and facial or radial run-out.
One centre is spring loaded for easy loading and unloading of job.
Fine alignment of centres is ensured by slot and tenon.
Available in following sizes (in mm):
Admit between centres: 300, 500, 750, 100
Height of centre: 125, 160 200
Co-axiality of centres as per IS 5980


Precision inspection bench Centre
 
  5) GEAR TESTING ATTACHMENT
 

FOR CHECKING CONCENTRICITY OF PCD OF GEARS

For inspecting concentricity and cumulative error of gears with respect to gear axis. A set of locating balls cover the range of modules (1.5 to 7) and the corresponding diametrical pitches.

Gear testing attachment

   
  6) MINI BENCH CENTRE
 

For application such as checking the concentricity of cylindrical and tapered parts.
Adjustable rigid bodies provided with positive fastening
Co-axiality of centres as per IS 5980
Admit between centres 200mm
Height of centre 75mm

Mini Bench Centre

   
  7) CAST IRON ANGLE PLATE
 

Used for clamping and holding work in vertical position for layout, tooling and machining.
Made as per IS:2554 in Grade-1 and 2 accuracies. Precision Angle Plates as per IS:6973 made on request. Angle Plate with T-slots on vertical side and elongated holes on table face made upon request at extra cost.

Sizes in mm
L X B X H
Grade of accuracy
Flatness of working face Microns
Squareness of working faces over dim. 'H' Microns
175 x 100 x 125
1
5
10
250 X 150 X 175
1
8
15
2
38
75
450 X 300 X 350
1
10
18
2
50
100


Cast Iron Angle Plate

   
  8) CAST IRON BOX ANGLE PLATE
 

Used for inspection, layout, tooling and machine set-ups. Also used as parallels, right angles or squares. Made as per IS:2632. Box Angle Plates in matched pairs offered upon request at extra cost. Precision Box angle Plates as per IS:6985 can also be offered.

Size in mm
L X B X H

Grade of accuracy
Flatness of working faces microns
Squareness of working faces over dim. 'H' microns
Parallelism of opposite faces Microns
250 X 150 X 175
1
8
15
18
2
38
75
88
350 X 200 X 250
1
8
18
20
2
38
75
88
450 X 300 X 350
1
10
18
20
2
50
100
113




Cast Iron Box Angle Plate
   
  9) CAST IRON I – SECTION STRAIGHT EDGE
 


ALFA Cast Iron Straight Edges are widely used for setting up and leveling machinery and for checking and spotting bearing surfaces during hand scraping operations. Properly supported, they may be used with various indicating devices to check surface flatness of large machined areas like Surface Tables, Machine Tables and Bed, Machine ways etc.

Sizes

25 x 40 x 300mm
30 x 60 x 500mm
80 x 80 x 500mm
100 x 100 x 1000mm
170 x 200 x 1500mm

 


Cast Iron I Section Straight Edge
   
  10) CAST IRON BASE COMPARATOR
 


Used widely in tool room, inspection rooms, machine shops, and die shops for measurement of work piece by direct comparison with master.

Model
Overall Height (mm)
        CSP200(200 X 150 X50MM)
250
        CSPT 200(Spiral Pillar)
250
        CICS200 ( Cross arm)
250
        CICS 200 (Spiral Pillar with Cross arm)
250
        CICST 200 (Spring Fine adjustment)
250
        CS 300 SF (Spring Fine adjustment)
250

Cast Iron Base Comparator
   
  11) DIAL STAND
 

Rugged triangular construction provides extra stability. Three point contact surface allows statically perfect positioning. Moves over surfaces with maximum ease and absolutely free from vibration.
Convenient hand grip facilities for easy operations. Post and support arm made of stainless steel.
Indicator swivels support provided with fine adjustment.

Model
Base mm
Overall height mm
Post dia mm
Mounting bore for indicator (mm)
DST
150X150
300
18
8
DSR
300X50
300
18
8

Dial Stand
   
  12) GRANITE BASE COMPARATOR
 

Base made of fine grain Black Granite. Precision comparator stand with fine adjustment consists of a strong and rigid parallel ring assembly locks with knurled knob. Heavy duty comparator with threaded and ground pillar bracket assembly provide extra rigidity for heavy duty application.

Model
Overall Height (mm)
        CS 200(200 X 150 X50MM)
250
        CST 200(Spiral Pillar)
250
        CSC 200 ( Cross arm)
250
        CS 200 SF (Spring Fine adjustment)
250
        CS 300 ( 300 x 200 x 50mm)
250
        CST 300(Spiral Pillar)
250
        CSC 300 ( Cross arm)
250
        CS 300 SF (Spring Fine adjustment)
250




Granite Base Comparator
  13) VERTICAL BENCH CENTER
 
 

For application such us checking the concentricity of cylindrical and tapered parts in vertical position.
Co-axiality of centres as per 1S 5980
Admit between centres 150mm
Height of centre 75mm

  

  14)Surface Rufness Tester Stand
 
ALFA make surface tester stand provided with custom built mounting bracket suitable for various models of surface roughness tester. Also offers cast iron base with T-slot and threaded inserts.
                          Size
                      Stroke
                   500 x 300 x 80                         250
 
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