SN71C

SN71C is universal centre lathe designed for piece and small-lot production for turning workpieces of bigger dimensions.It is suitable for maintenance and repair divisions as well.  It has wide range of operational speeds and its unique execution ensures high stability in material machining.

Most important features:

  • Easy maintenance
  • Long lifetime
  • Low operating costs
  • Easy and ergonomic control
  • High turning precision
  • Various versions with wide range of optional accessories

 

CHARACTERISTIC FEATURES:

Important parts of the machine are made of grey cast iron – minimization of generating vibrations throughout machining Hardened bed guide ways – long lifetime and constant accuracy of machining Hand scrapping of the important parts – high precision during machining
Bed gap for increasing the swing and delta-shape bed – high resistance against deformation and continuous chip conveyance Spindle drive through clutches and brake – smooth movement stop Single lever for four way control of feeds with adjustable feed clutches

 

Machines of outstanding performance designed for piece and small-lot production suitable also for maintenance and repair divisions. TRENS lathes are precise and reliable machines in wide range of versions and optional accessories.

MAIN ADVANTAGES:

  • Easy maintenance
  • Long lifetime
  • Low operating costs
  • Simple and ergonomic control
  • High turning precision
  • Possibility to cut all types of threads with wide range of pitches
  • Wide range of optional accessories – digital read-outs, quick-change tool posts, steady and follow rests, rolling contact bearings for steadies, micrometric stops, taper turning attachments, faceplates and chucks

 
Universal centre lathes belong to the most requested products of production portfolio of company TRENS SK, a.s.. Since half of the twentieth century they were known under the brand TOS (currently TRENS) and are still fulfilling the highest customers´ requirements. Thanks to persistent quality and sustaining development TRENS SK reaches leading places among world producers of universal center lathes. The result is more than 100 000 sold lathes throughout the globe and satisfied customers that repeatedly choose brand TRENS.

Typ stroja jedn. SN32 SN50C SN71C SN500SA SN710S SUI80
               
Working range :              
Max. swing over bed mm 330 500 710 505 720 800
Max. swing over cross slide mm 168 270 420 270 430 520
Max. swing in bed gap mm 520 700 960 700 960 870
Bed gap width mm 230 230 300 230 300 320
Distance between centers mm 750, 1000 1000,1500, 2000 1500, 2000, 3000, 4000 1000, 1500, 2000 1500, 2000, 3000, 4000 1500, 2000, 3000, 4000, 6000, 8000
Height of centers mm 160 250 355 250 355 395
Bed width mm 340 340 450 340 450 550
               
Main spindle :              
Spindle nose DIN (ISO702-III)   B6 B6 B8 B8/B11* B8/B11* B11
Spindle nose Camlock (ISO702-II)   D6* D6* D8* D8*/D11* D8*/D11* D11*
Internal spindle taper   MORSE 6 MORSE 6 METRIC 80 METRIC 90/110* METRIC 90/115*/-* METRIC 100
Spindle bore mm 52 52 73,5 77/105* 77/105*/130* 92
Spindle diameter in front bearing mm 80 80 110 110/140* 110/140*/170* 140
Min. spindle speed min -1 14 22 10 12,5 10/12,5* 14
Max. spindle speed min -1 2500 2000 1000 2000/1600* 1600/1250* 1400
Number of gears   16 24 16 18 18 17
               
Spindle drive :              
Main motor output kW 4 5,5 7,5 7,5 7,5/11* 15/18,5*
Max. torque Nm 40 45 20 50 40/50* 45
Limit speed for max. torque min -1 1000 1200 2400 1450 1650/2000* 3200
               
Carriages :              
X-axis              
Working range of cross feed mm.rev -1 0,12-1,6 0,025-3,2 0,025-3,2 0,025-3,2 0,025-3,2 0,03-6,5
Cross rapid traverse mm.min -1 without rapid traverse 1500 1500 1500 1500 2400
Working travel mm 250 300 400 300 400 440
Tool slide working travel mm 140 140 180 140 180 195
Z-axis              
Working range of longitudinal feed mm.rev -1 0,025-3,2 0,05-6,4 0,05-6,4 0,05-6,4 0,05-6,4 0,06-13
Longitudinal rapid traverse mm.min -1 without rapid traverse 3000 3000 3000 3000 4800
Working travel mm depends on clamping device depends on clamping device depends on clamping device depends on clamping device depends on clamping device depends on
clamping device
               
Toolposts              
Standard toolpost   4-way toolpost 4-way toolpost 4-way toolpost 4-way toolpost 4-way toolpost 4-way toolpost
Max. tool size mm 20x20 32x32 40x40 32x32 40x40 40x40
               
Quick change toolpost   MultiSuisse B* MultiSuisse C* MultiSuisse C* MultiSuisse C* MultiSuisse C* MultiSuisse D*
Max. tool size mm 20x20* 32x32* 32x32* 32x32* 32x32* 40x40
               
Tailstock :              
Tailstock sleeve internal taper     MORSE 5 MORSE 5 MORSE 5 MORSE 5 MORSE 6
Tailstock sleeve diameter mm 70 70 90 80 100 110/120*
Tailstock sleeve travel mm 180 180 240 180 240 210
Tailstock control mm            
Tailstock control   manual manual manual/mechanical* manual manual/tailstock tow* manual/mechanical*
Cross resetting mm ±12 ±12 ±10 ±12 ±10 ±10
               
Threads :              
Metric threads               
- number   26 29 29 29 29 43
- pitch mm 0,25-20 0,5-40 0,5-40 0,5-40 0,5-40 0,5-160
Whitworth threads              
- number   38 38 38 38 38 40
- pitch záv./1" 2-160  1-80  1-80  1-80  1-80  1/8-40
Modular threads                 
- number   21 26 26 26 26 36
- pitch mm 0,125-10 0,25-20 0,25-20 0,25-20 0,25-20 0,25-48
Diametral Pitch threads              
- number   32 31 31 31 31 42
- number of DP threads   4-160  2-72  2-72  2-72  2-72  3/8-80
               
Machine dimensions :              
Height mm 1445 1500 1560 1525 1635 1700
Width mm 1010 1100 1130/1445* 1100 1275 1570
Length/Weight :              
750 mm / kg 2615 / 1540          
1000 mm / kg 2640 / 1620 2640 / 1735   2595 / 2300    
1500 mm / kg   3140 / 1835 3445 / 2960 3095 / 2400 3515 / 3090 3560 / 5180
2000 mm / kg   3640 / 1940 3945 / 3080 3595 / 2600 4015 / 3250 4060 / 5440
3000 mm / kg     4945 / 3330   5015 / 3620 5060 / 5970
4000 mm / kg     5945 / 3580   6015 / 3890 6060 / 6400
6000 mm / kg           8060 / 7670
8000 mm / kg           10060 / 8630
               
Weight (without optional accessories)              
https://www.trens.sk/en/sites/default/files/TRENS_SN_32_50_71_ENG_0.pdf